rfc8984.original   rfc8984.txt 
Calendaring extensions N. Jenkins Internet Engineering Task Force (IETF) N. Jenkins
Internet-Draft R. Stepanek Request for Comments: 8984 R. Stepanek
Intended status: Standards Track Fastmail Category: Standards Track Fastmail
Expires: April 19, 2021 October 16, 2020 ISSN: 2070-1721 July 2021
JSCalendar: A JSON representation of calendar data JSCalendar: A JSON Representation of Calendar Data
draft-ietf-calext-jscalendar-32
Abstract Abstract
This specification defines a data model and JSON representation of This specification defines a data model and JSON representation of
calendar data that can be used for storage and data exchange in a calendar data that can be used for storage and data exchange in a
calendaring and scheduling environment. It aims to be an alternative calendaring and scheduling environment. It aims to be an alternative
and, over time, successor to the widely deployed iCalendar data and, over time, successor to the widely deployed iCalendar data
format, and to be unambiguous, extendable, and simple to process. In format. It also aims to be unambiguous, extendable, and simple to
contrast to the jCal format, which is also JSON-based, JSCalendar is process. In contrast to the jCal format, which is also based on
not a direct mapping from iCalendar, but defines the data model JSON, JSCalendar is not a direct mapping from iCalendar but defines
independently and expands semantics where appropriate. the data model independently and expands semantics where appropriate.
Status of This Memo Status of This Memo
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Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction
1.1. Motivation and Relation to iCalendar and jCal . . . . . . 5 1.1. Motivation and Relation to iCalendar and jCal
1.2. Notational Conventions . . . . . . . . . . . . . . . . . 6 1.2. Notational Conventions
1.3. Type Signatures . . . . . . . . . . . . . . . . . . . . . 6 1.3. Type Signatures
1.4. Data Types . . . . . . . . . . . . . . . . . . . . . . . 7 1.4. Data Types
1.4.1. Id . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.4.1. Id
1.4.2. Int . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.4.2. Int
1.4.3. UnsignedInt . . . . . . . . . . . . . . . . . . . . . 8 1.4.3. UnsignedInt
1.4.4. UTCDateTime . . . . . . . . . . . . . . . . . . . . . 8 1.4.4. UTCDateTime
1.4.5. LocalDateTime . . . . . . . . . . . . . . . . . . . . 8 1.4.5. LocalDateTime
1.4.6. Duration . . . . . . . . . . . . . . . . . . . . . . 9 1.4.6. Duration
1.4.7. SignedDuration . . . . . . . . . . . . . . . . . . . 10 1.4.7. SignedDuration
1.4.8. TimeZoneId . . . . . . . . . . . . . . . . . . . . . 10 1.4.8. TimeZoneId
1.4.9. PatchObject . . . . . . . . . . . . . . . . . . . . . 11 1.4.9. PatchObject
1.4.10. Relation . . . . . . . . . . . . . . . . . . . . . . 12 1.4.10. Relation
1.4.11. Link . . . . . . . . . . . . . . . . . . . . . . . . 12 1.4.11. Link
2. JSCalendar Objects . . . . . . . . . . . . . . . . . . . . . 14 2. JSCalendar Objects
2.1. JSEvent . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.1. Event
2.2. JSTask . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2. Task
2.3. JSGroup . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.3. Group
3. Structure of JSCalendar Objects . . . . . . . . . . . . . . . 15 3. Structure of JSCalendar Objects
3.1. Object Type . . . . . . . . . . . . . . . . . . . . . . . 15 3.1. Object Type
3.2. Normalization and Equivalence . . . . . . . . . . . . . . 15 3.2. Normalization and Equivalence
3.3. Vendor-specific Property Extensions, Values and Types . . 15 3.3. Vendor-Specific Property Extensions, Values, and Types
4. Common JSCalendar Properties . . . . . . . . . . . . . . . . 16 4. Common JSCalendar Properties
4.1. Metadata Properties . . . . . . . . . . . . . . . . . . . 16 4.1. Metadata Properties
4.1.1. @type . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1.1. @type
4.1.2. uid . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1.2. uid
4.1.3. relatedTo . . . . . . . . . . . . . . . . . . . . . . 17 4.1.3. relatedTo
4.1.4. prodId . . . . . . . . . . . . . . . . . . . . . . . 17 4.1.4. prodId
4.1.5. created . . . . . . . . . . . . . . . . . . . . . . . 17 4.1.5. created
4.1.6. updated . . . . . . . . . . . . . . . . . . . . . . . 18 4.1.6. updated
4.1.7. sequence . . . . . . . . . . . . . . . . . . . . . . 18 4.1.7. sequence
4.1.8. method . . . . . . . . . . . . . . . . . . . . . . . 18 4.1.8. method
4.2. What and Where Properties . . . . . . . . . . . . . . . . 18 4.2. What and Where Properties
4.2.1. title . . . . . . . . . . . . . . . . . . . . . . . . 18 4.2.1. title
4.2.2. description . . . . . . . . . . . . . . . . . . . . . 18 4.2.2. description
4.2.3. descriptionContentType . . . . . . . . . . . . . . . 18 4.2.3. descriptionContentType
4.2.4. showWithoutTime . . . . . . . . . . . . . . . . . . . 19 4.2.4. showWithoutTime
4.2.5. locations . . . . . . . . . . . . . . . . . . . . . . 19 4.2.5. locations
4.2.6. virtualLocations . . . . . . . . . . . . . . . . . . 20 4.2.6. virtualLocations
4.2.7. links . . . . . . . . . . . . . . . . . . . . . . . . 21 4.2.7. links
4.2.8. locale . . . . . . . . . . . . . . . . . . . . . . . 21 4.2.8. locale
4.2.9. keywords . . . . . . . . . . . . . . . . . . . . . . 22 4.2.9. keywords
4.2.10. categories . . . . . . . . . . . . . . . . . . . . . 22 4.2.10. categories
4.2.11. color . . . . . . . . . . . . . . . . . . . . . . . . 22 4.2.11. color
4.3. Recurrence Properties . . . . . . . . . . . . . . . . . . 22 4.3. Recurrence Properties
4.3.1. recurrenceId . . . . . . . . . . . . . . . . . . . . 23 4.3.1. recurrenceId
4.3.2. recurrenceRules . . . . . . . . . . . . . . . . . . . 23 4.3.2. recurrenceIdTimeZone
4.3.3. excludedRecurrenceRules . . . . . . . . . . . . . . . 31 4.3.3. recurrenceRules
4.3.4. recurrenceOverrides . . . . . . . . . . . . . . . . . 32 4.3.4. excludedRecurrenceRules
4.3.5. excluded . . . . . . . . . . . . . . . . . . . . . . 33 4.3.5. recurrenceOverrides
4.4. Sharing and Scheduling Properties . . . . . . . . . . . . 33 4.3.6. excluded
4.4.1. priority . . . . . . . . . . . . . . . . . . . . . . 33 4.4. Sharing and Scheduling Properties
4.4.2. freeBusyStatus . . . . . . . . . . . . . . . . . . . 33 4.4.1. priority
4.4.3. privacy . . . . . . . . . . . . . . . . . . . . . . . 34 4.4.2. freeBusyStatus
4.4.4. replyTo . . . . . . . . . . . . . . . . . . . . . . . 35 4.4.3. privacy
4.4.5. participants . . . . . . . . . . . . . . . . . . . . 35 4.4.4. replyTo
4.5. Alerts Properties . . . . . . . . . . . . . . . . . . . . 41 4.4.5. sentBy
4.5.1. useDefaultAlerts . . . . . . . . . . . . . . . . . . 41 4.4.6. participants
4.5.2. alerts . . . . . . . . . . . . . . . . . . . . . . . 41 4.4.7. requestStatus
4.6. Multilingual Properties . . . . . . . . . . . . . . . . . 43 4.5. Alerts Properties
4.6.1. localizations . . . . . . . . . . . . . . . . . . . . 43 4.5.1. useDefaultAlerts
4.7. Time Zone Properties . . . . . . . . . . . . . . . . . . 44 4.5.2. alerts
4.7.1. timeZone . . . . . . . . . . . . . . . . . . . . . . 44 4.6. Multilingual Properties
4.7.2. timeZones . . . . . . . . . . . . . . . . . . . . . . 44 4.6.1. localizations
5. Type-specific JSCalendar Properties . . . . . . . . . . . . . 47 4.7. Time Zone Properties
5.1. JSEvent Properties . . . . . . . . . . . . . . . . . . . 47 4.7.1. timeZone
5.1.1. start . . . . . . . . . . . . . . . . . . . . . . . . 47 4.7.2. timeZones
5.1.2. duration . . . . . . . . . . . . . . . . . . . . . . 47 5. Type-Specific JSCalendar Properties
5.1.3. status . . . . . . . . . . . . . . . . . . . . . . . 47 5.1. Event Properties
5.2. JSTask Properties . . . . . . . . . . . . . . . . . . . . 48 5.1.1. start
5.2.1. due . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.1.2. duration
5.2.2. start . . . . . . . . . . . . . . . . . . . . . . . . 48 5.1.3. status
5.2.3. estimatedDuration . . . . . . . . . . . . . . . . . . 48 5.2. Task Properties
5.2.4. percentComplete . . . . . . . . . . . . . . . . . . . 48 5.2.1. due
5.2.5. progress . . . . . . . . . . . . . . . . . . . . . . 48 5.2.2. start
5.2.6. progressUpdated . . . . . . . . . . . . . . . . . . . 49 5.2.3. estimatedDuration
5.3. JSGroup Properties . . . . . . . . . . . . . . . . . . . 49 5.2.4. percentComplete
5.3.1. entries . . . . . . . . . . . . . . . . . . . . . . . 50 5.2.5. progress
5.3.2. source . . . . . . . . . . . . . . . . . . . . . . . 50 5.2.6. progressUpdated
6. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 50 5.3. Group Properties
6.1. Simple event . . . . . . . . . . . . . . . . . . . . . . 51 5.3.1. entries
6.2. Simple task . . . . . . . . . . . . . . . . . . . . . . . 51 5.3.2. source
6.3. Simple group . . . . . . . . . . . . . . . . . . . . . . 51 6. Examples
6.4. All-day event . . . . . . . . . . . . . . . . . . . . . . 52 6.1. Simple Event
6.5. Task with a due date . . . . . . . . . . . . . . . . . . 52 6.2. Simple Task
6.6. Event with end time zone . . . . . . . . . . . . . . . . 53 6.3. Simple Group
6.7. Floating-time event (with recurrence) . . . . . . . . . . 53 6.4. All-Day Event
6.8. Event with multiple locations and localization . . . . . 54 6.5. Task with a Due Date
6.9. Recurring event with overrides . . . . . . . . . . . . . 55 6.6. Event with End Time Zone
6.10. Recurring event with participants . . . . . . . . . . . . 56 6.7. Floating-Time Event (with Recurrence)
7. Security Considerations . . . . . . . . . . . . . . . . . . . 58 6.8. Event with Multiple Locations and Localization
7.1. Expanding Recurrences . . . . . . . . . . . . . . . . . . 58 6.9. Recurring Event with Overrides
7.2. JSON Parsing . . . . . . . . . . . . . . . . . . . . . . 59 6.10. Recurring Event with Participants
7.3. URI Values . . . . . . . . . . . . . . . . . . . . . . . 59 7. Security Considerations
7.4. Spam . . . . . . . . . . . . . . . . . . . . . . . . . . 60 7.1. Expanding Recurrences
7.5. Duplication . . . . . . . . . . . . . . . . . . . . . . . 60 7.2. JSON Parsing
7.6. Time Zones . . . . . . . . . . . . . . . . . . . . . . . 60 7.3. URI Values
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 61 7.4. Spam
8.1. Media Type Registration . . . . . . . . . . . . . . . . . 61 7.5. Duplication
8.2. Creation of "JSCalendar Properties" Registry . . . . . . 62 7.6. Time Zones
8.2.1. Preliminary Community Review . . . . . . . . . . . . 63 8. IANA Considerations
8.2.2. Submit Request to IANA . . . . . . . . . . . . . . . 63 8.1. Media Type Registration
8.2.3. Designated Expert Review . . . . . . . . . . . . . . 63 8.2. Creation of the "JSCalendar Properties" Registry
8.2.4. Change Procedures . . . . . . . . . . . . . . . . . . 63 8.2.1. Preliminary Community Review
8.2.5. JSCalendar Properties Registry Template . . . . . . . 64 8.2.2. Submit Request to IANA
8.2.6. Initial Contents for the JSCalendar Properties 8.2.3. Designated Expert Review
Registry . . . . . . . . . . . . . . . . . . . . . . 64 8.2.4. Change Procedures
8.3. Creation of "JSCalendar Types" Registry . . . . . . . . . 73 8.2.5. "JSCalendar Properties" Registry Template
8.3.1. JSCalendar Types Registry Template . . . . . . . . . 73 8.2.6. Initial Contents for the "JSCalendar Properties"
8.3.2. Initial Contents for the JSCalendar Types Registry . 73 Registry
8.4. Creation of "JSCalendar Enum Values" Registry . . . . . . 74 8.3. Creation of the "JSCalendar Types" Registry
8.4.1. JSCalendar Enum Property Template . . . . . . . . . . 74 8.3.1. "JSCalendar Types" Registry Template
8.4.2. JSCalendar Enum Value Template . . . . . . . . . . . 75 8.3.2. Initial Contents for the "JSCalendar Types" Registry
8.4.3. Initial Contents for the JSCalendar Enum Values 8.4. Creation of the "JSCalendar Enum Values" Registry
registry . . . . . . . . . . . . . . . . . . . . . . 75 8.4.1. "JSCalendar Enum Values" Registry Property Template
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 81 8.4.2. "JSCalendar Enum Values" Registry Value Template
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 81 8.4.3. Initial Contents for the "JSCalendar Enum Values"
10.1. Normative References . . . . . . . . . . . . . . . . . . 82 Registry
10.2. Informative References . . . . . . . . . . . . . . . . . 84 9. References
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 85 9.1. Normative References
9.2. Informative References
Acknowledgments
Authors' Addresses
1. Introduction 1. Introduction
This document defines a data model for calendar event and task This document defines a data model for calendar event and task
objects, or groups of such objects, in electronic calendar objects, or groups of such objects, in electronic calendar
applications and systems. The format aims to be unambiguous, applications and systems. The format aims to be unambiguous,
extendable and simple to process. extendable, and simple to process.
The key design considerations for this data model are as follows: The key design considerations for this data model are as follows:
o The attributes of the calendar entry represented must be described * The attributes of the calendar entry represented must be described
as simple key-value pairs. Simple events are simple to represent; as simple key-value pairs. Simple events are simple to represent;
complex events can be modelled accurately. complex events can be modeled accurately.
o Wherever possible, there should be only one way to express the * Wherever possible, there should be only one way to express the
desired semantics, reducing complexity. desired semantics, reducing complexity.
o The data model should avoid ambiguities, which often lead to * The data model should avoid ambiguities, which often lead to
interoperability issues between implementations. interoperability issues between implementations.
o The data model should be generally compatible with the iCalendar * The data model should be generally compatible with the iCalendar
data format [RFC5545] [RFC7986] and extensions, but the data format [RFC5545] [RFC7986] and extensions, but the
specification should add new attributes where the iCalendar format specification should add new attributes where the iCalendar format
currently lacks expressivity, and drop seldom-used, obsolete, or currently lacks expressivity, and drop seldom-used, obsolete, or
redundant properties. This means translation with no loss of redundant properties. This means translation with no loss of
semantics should be easy with most common iCalendar files. semantics should be easy with most common iCalendar files.
o Extensions, such as new properties and components, should not * Extensions, such as new properties and components, should not
require updates to this document. require updates to this document.
The representation of this data model is defined in the I-JSON format The representation of this data model is defined in the Internet JSON
[RFC7493], which is a strict subset of the JavaScript Object Notation (I-JSON) format [RFC7493], which is a strict subset of the JSON data
(JSON) Data Interchange Format [RFC8259]. Using JSON is mostly a interchange format [RFC8259]. Using JSON is mostly a pragmatic
pragmatic choice: its widespread use makes JSCalendar easier to choice: its widespread use makes JSCalendar easier to adopt and the
adopt, and the ready availability of production-ready JSON ready availability of production-ready JSON implementations
implementations eliminates a whole category of parser-related eliminates a whole category of parser-related interoperability
interoperability issues, which iCalendar has often suffered from. issues, which iCalendar has often suffered from.
1.1. Motivation and Relation to iCalendar and jCal 1.1. Motivation and Relation to iCalendar and jCal
The iCalendar data format [RFC5545], a widely deployed interchange The iCalendar data format [RFC5545], a widely deployed interchange
format for calendaring and scheduling data, has served calendaring format for calendaring and scheduling data, has served calendaring
vendors for a long while, but contains some ambiguities and pitfalls vendors for a long time but contains some ambiguities and pitfalls
that can not be overcome without backward-incompatible changes. that cannot be overcome without backward-incompatible changes.
Sources of implementation errors include the following: Sources of implementation errors include the following:
o iCalendar defines various formats for local times, UTC time, and * iCalendar defines various formats for local times, UTC, and dates.
dates.
o iCalendar requires custom time zone definitions within a single * iCalendar requires custom time zone definitions within a single
calendar component. calendar component.
o iCalendar's definition of recurrence rules is ambiguous and has * iCalendar's definition of recurrence rules is ambiguous and has
resulted in differing understandings even between experienced resulted in differing interpretations, even between experienced
calendar developers. calendar developers.
o The iCalendar format itself causes interoperability issues due to * The iCalendar format itself causes interoperability issues due to
misuse of CRLF-terminated strings, line continuations, and subtle misuse of CRLF-terminated strings, line continuations, and subtle
differences among iCalendar parsers. differences among iCalendar parsers.
In recent years, many new products and services have appeared that In recent years, many new products and services have appeared that
wish to use a JSON representation of calendar data within their APIs. wish to use a JSON representation of calendar data within their APIs.
The JSON format for iCalendar data, jCal [RFC7265], is a direct The JSON format for iCalendar data, jCal [RFC7265], is a direct
mapping between iCalendar and JSON. In its effort to represent full mapping between iCalendar and JSON. In its effort to represent full
iCalendar semantics, it inherits all the same pitfalls and uses a iCalendar semantics, it inherits all the same pitfalls and uses a
complicated JSON structure. complicated JSON structure.
As a consequence, since the standardization of jCal, the majority of As a consequence, since the standardization of jCal, the majority of
implementations and service providers either kept using iCalendar, or implementations and service providers either kept using iCalendar or
came up with their own proprietary JSON representations, which are came up with their own proprietary JSON representations, which are
incompatible with each other and often suffer from common pitfalls, incompatible with each other and often suffer from common pitfalls,
such as storing event start times in UTC (which become incorrect if such as storing event start times in UTC (which become incorrect if
the timezone's rules change in the future). JSCalendar meets the the time zone's rules change in the future). JSCalendar meets the
demand for JSON-formatted calendar data that is free of such known demand for JSON-formatted calendar data that is free of such known
problems and provides a standard representation as an alternative to problems and provides a standard representation as an alternative to
the proprietary formats. the proprietary formats.
1.2. Notational Conventions 1.2. Notational Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP "OPTIONAL" in this document are to be interpreted as described in
14 [RFC2119] [RFC8174] when, and only when, they appear in all BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here. capitals, as shown here.
The underlying format used for this specification is JSON. The underlying format used for this specification is JSON.
Consequently, the terms "object" and "array" as well as the four Consequently, the terms "object" and "array" as well as the four
primitive types (strings, numbers, booleans, and null) are to be primitive types (strings, numbers, booleans, and null) are to be
interpreted as described in Section 1 of [RFC8259]. interpreted as described in Section 1 of [RFC8259].
Some examples in this document contain "partial" JSON documents used Some examples in this document contain "partial" JSON documents used
for illustrative purposes. In these examples, three periods "..." for illustrative purposes. In these examples, an ellipsis "..." is
are used to indicate a portion of the document that has been removed used to indicate a portion of the document that has been removed for
for compactness. compactness.
1.3. Type Signatures 1.3. Type Signatures
Type signatures are given for all JSON values in this document. The Type signatures are given for all JSON values in this document. The
following conventions are used: following conventions are used:
o "*" - The type is undefined (the value could be any type, although "*": The type is undefined (the value could be any type, although
permitted values may be constrained by the context of this value). permitted values may be constrained by the context of this value).
o "String" - The JSON string type. "String": This is the JSON string type.
o "Number" - The JSON number type. "Number": This is the JSON number type.
o "Boolean" - The JSON boolean type. "Boolean": This is the JSON boolean type.
o "A[B]" - A JSON object where the keys are all of type "A", and the "A[B]": The keys are all of type "A" and the values are all of type
values are all of type "B". "B" for a JSON object.
o "A[]" - An array of values of type "A". "A[]": There is an array of values of type "A"
o "A|B" - The value is either of type "A" or of type "B". "A|B": The value is either of type "A" or of type "B".
Other types may also be given, with their representations defined Other types may also be given; their representations are defined
elsewhere in this document. elsewhere in this document.
1.4. Data Types 1.4. Data Types
In addition to the standard JSON data types, the following data types In addition to the standard JSON data types, the following data types
are used in this specification: are used in this specification:
1.4.1. Id 1.4.1. Id
Where "Id" is given as a data type, it means a "String" of at least 1 Where "Id" is given as a data type, it means a "String" of at least 1
and a maximum of 255 octets in size, and it MUST only contain and a maximum of 255 octets in size, and it MUST only contain
characters from the "URL and Filename Safe" base64url alphabet, as characters from the "URL and Filename Safe" base64url alphabet, as
defined in Section 5 of [RFC4648], excluding the pad character ("="). defined in Section 5 of [RFC4648], excluding the pad character ("=").
This means the allowed characters are the ASCII alphanumeric This means the allowed characters are the ASCII alphanumeric
characters ("A-Za-z0-9"), hyphen ("-"), and underscore ("_"). characters ("A-Za-z0-9"), hyphen ("-"), and underscore ("_").
In many places in JSCalendar a JSON map is used where the map keys In many places in JSCalendar, a JSON map is used where the map keys
are of type Id and the map values are all the same type of object. are of type Id and the map values are all the same type of object.
This construction represents an unordered set of objects, with the This construction represents an unordered set of objects, with the
added advantage that each entry has a name (the corresponding map added advantage that each entry has a name (the corresponding map
key). This allows for more concise patching of objects, and, when key). This allows for more concise patching of objects, and, when
applicable, for the objects in question to be referenced from other applicable, for the objects in question to be referenced from other
objects within the JSCalendar object. objects within the JSCalendar object.
Unless otherwise specified for a particular property, there are no Unless otherwise specified for a particular property, there are no
uniqueness constraints on an Id value (other than, of course, the uniqueness constraints on an Id value (other than, of course, the
requirement that you cannot have two values with the same key within requirement that you cannot have two values with the same key within
a single JSON map). For example, two JSEvent objects might use the a single JSON map). For example, two Event objects might use the
same Ids in their respective "links" properties. Or within the same same Ids in their respective "links" properties or, within the same
JSEvent object the same Id could appear in the "participants" and Event object, the same Id could appear in the "participants" and
"alerts" properties. These situations do not imply any semantic "alerts" properties. These situations do not imply any semantic
connections among the objects. connections among the objects.
Nevertheless, a UUID [RFC4122] is typically a good choice.
1.4.2. Int 1.4.2. Int
Where "Int" is given as a data type, it means an integer in the range Where "Int" is given as a data type, it means an integer in the range
-2^53+1 <= value <= 2^53-1, the safe range for integers stored in a -2^53+1 <= value <= 2^53-1, the safe range for integers stored in a
floating-point double, represented as a JSON "Number". floating-point double, represented as a JSON "Number".
1.4.3. UnsignedInt 1.4.3. UnsignedInt
Where "UnsignedInt" is given as a data type, it means an integer in Where "UnsignedInt" is given as a data type, it means an integer in
the range 0 <= value <= 2^53-1, represented as a JSON "Number". the range 0 <= value <= 2^53-1, represented as a JSON "Number".
1.4.4. UTCDateTime 1.4.4. UTCDateTime
This is a string in [RFC3339] "date-time" format, with the further This is a string in the "date-time" [RFC3339] format, with the
restrictions that any letters MUST be in uppercase, and the time further restrictions that any letters MUST be in uppercase, and the
offset MUST be the character "Z". Fractional second values MUST NOT time offset MUST be the character "Z". Fractional second values MUST
be included unless non-zero and MUST NOT have trailing zeros, to NOT be included unless non-zero and MUST NOT have trailing zeros, to
ensure there is only a single representation for each date-time. ensure there is only a single representation for each date-time.
For example "2010-10-10T10:10:10.003Z" is conformant, but For example, "2010-10-10T10:10:10.003Z" is conformant, but
"2010-10-10T10:10:10.000Z" is invalid and is correctly encoded as "2010-10-10T10:10:10.000Z" is invalid and is correctly encoded as
"2010-10-10T10:10:10Z". "2010-10-10T10:10:10Z".
1.4.5. LocalDateTime 1.4.5. LocalDateTime
This is a date-time string with no time zone/offset information. It This is a date-time string with no time zone/offset information. It
is otherwise in the same format as UTCDateTime, including fractional is otherwise in the same format as UTCDateTime, including fractional
seconds. For example "2006-01-02T15:04:05" and seconds. For example, "2006-01-02T15:04:05" and
"2006-01-02T15:04:05.003" are both valid. The time zone to associate "2006-01-02T15:04:05.003" are both valid. The time zone to associate
with the LocalDateTime comes from the "timeZone" property of the with the LocalDateTime comes from the "timeZone" property of the
JSCalendar object (see Section 4.7.1). If no time zone is specified, JSCalendar object (see Section 4.7.1). If no time zone is specified,
the LocalDateTime is "floating". Floating date-times are not tied to the LocalDateTime is "floating". Floating date-times are not tied to
any specific time zone. Instead, they occur in each time zone at the any specific time zone. Instead, they occur in each time zone at the
given wall-clock time (as opposed to the same instant point in time). given wall-clock time (as opposed to the same instant point in time).
A time zone may have a period of discontinuity, for example a change A time zone may have a period of discontinuity, for example, a change
from standard time to daylight-savings time. When converting local from standard time to daylight savings time. When converting local
date-times that fall in the discontinuity to UTC, the offset before date-times that fall in the discontinuity to UTC, the offset before
the transition MUST be used. the transition MUST be used.
For example, in the America/Los_Angeles time zone, the date-time For example, in the America/Los_Angeles time zone, the date-time
2020-11-01T01:30:00 occurs twice: before the DST transition with a 2020-11-01T01:30:00 occurs twice: before the daylight savings time
UTC offset of -07:00, and again after the transition with an offset (DST) transition with a UTC offset of -07:00 and again after the
of -08:00. When converting to UTC, we therefore use the offset transition with an offset of -08:00. When converting to UTC, we
before the transition (-07:00) and so it becomes therefore use the offset before the transition (-07:00), so it
2020-11-01T08:30:00Z. becomes 2020-11-01T08:30:00Z.
Similarly, in the Australia/Melbourne time zone, the date-time Similarly, in the Australia/Melbourne time zone, the date-time
2020-10-04T02:30:00 does not exist: the clocks are moved forward one 2020-10-04T02:30:00 does not exist; the clocks are moved forward one
hour for DST on that day at 02:00. However, such a value may appear hour for DST on that day at 02:00. However, such a value may appear
during calculations (see duration semantics in Section 1.4.6), or due during calculations (see duration semantics in Section 1.4.6) or due
to a change in time zone rules (so it was valid when the event was to a change in time zone rules (so it was valid when the event was
first created). Again, it is interpreted as though the offset before first created). Again, it is interpreted as though the offset before
the transition is in effect (+10:00), therefore when converted to UTC the transition is in effect (+10:00); therefore, when converted to
we get 2020-10-03T16:30:00Z. UTC, we get 2020-10-03T16:30:00Z.
1.4.6. Duration 1.4.6. Duration
Where Duration is given as a type, it means a length of time Where Duration is given as a type, it means a length of time
represented by a subset of ISO8601 duration format, as specified by represented by a subset of the ISO 8601 duration format, as specified
the following ABNF [RFC5234]: by the following ABNF [RFC5234]:
dur-secfrac = "." 1*DIGIT dur-secfrac = "." 1*DIGIT
dur-second = 1*DIGIT [dur-secfrac] "S" dur-second = 1*DIGIT [dur-secfrac] "S"
dur-minute = 1*DIGIT "M" [dur-second] dur-minute = 1*DIGIT "M" [dur-second]
dur-hour = 1*DIGIT "H" [dur-minute] dur-hour = 1*DIGIT "H" [dur-minute]
dur-time = "T" (dur-hour / dur-minute / dur-second) dur-time = "T" (dur-hour / dur-minute / dur-second)
dur-day = 1*DIGIT "D" dur-day = 1*DIGIT "D"
dur-week = 1*DIGIT "W" dur-week = 1*DIGIT "W"
dur-cal = (dur-week [dur-day] / dur-day) dur-cal = (dur-week [dur-day] / dur-day)
duration = "P" (dur-cal [dur-time] / dur-time) duration = "P" (dur-cal [dur-time] / dur-time)
In addition, the duration MUST NOT include fractional second values In addition, the duration MUST NOT include fractional second values
unless the fraction is non-zero. Fractional second values MUST NOT unless the fraction is non-zero. Fractional second values MUST NOT
have trailing zeros, to ensure there is only a single representation have trailing zeros to ensure there is only a single representation
for each duration. for each duration.
A duration specifies an abstract number of weeks, days, hours, A duration specifies an abstract number of weeks, days, hours,
minutes, and/or seconds. A duration specified using weeks or days minutes, and/or seconds. A duration specified using weeks or days
does not always correspond to an exact multiple of 24 hours. The does not always correspond to an exact multiple of 24 hours. The
number of hours/minutes/seconds may vary if it overlaps a period of number of hours/minutes/seconds may vary if it overlaps a period of
discontinuity in the event's time zone, for example a change from discontinuity in the event's time zone, for example, a change from
standard time to daylight-savings time. Leap seconds MUST NOT be standard time to daylight savings time. Leap seconds MUST NOT be
considered when adding or subtracting a duration to/from a considered when adding or subtracting a duration to/from a
LocalDateTime. LocalDateTime.
To add a duration to a LocalDateTime: To add a duration to a LocalDateTime:
1. Add any week or day components of the duration to the date. A 1. Add any week or day components of the duration to the date. A
week is always the same as 7 days. week is always the same as seven days.
2. If a time zone applies to the LocalDateTime, convert it to a 2. If a time zone applies to the LocalDateTime, convert it to a
UTCDateTime following the semantics in Section 1.4.5. UTCDateTime following the semantics in Section 1.4.5.
3. Add any hour, minute or second components of the duration (in 3. Add any hour, minute, or second components of the duration (in
absolute time). absolute time).
4. Convert the resulting UTCDateTime back to a LocalDateTime in the 4. Convert the resulting UTCDateTime back to a LocalDateTime in the
time zone that applies. time zone that applies.
To subtract a duration from a LocalDateTime, the steps apply in To subtract a duration from a LocalDateTime, the steps apply in
reverse: reverse:
1. If a time zone applies to the LocalDateTime, convert it to UTC 1. If a time zone applies to the LocalDateTime, convert it to UTC
following the semantics in Section 1.4.5. following the semantics in Section 1.4.5.
2. Subtract any hour, minute or second components of the duration 2. Subtract any hour, minute, or second components of the duration
(in absolute time). (in absolute time).
3. Convert the resulting UTCDateTime back to LocalDateTime in the 3. Convert the resulting UTCDateTime back to LocalDateTime in the
time zone that applies. time zone that applies.
4. Subtract any week or day components of the duration from the 4. Subtract any week or day components of the duration from the
date. date.
5. If the resulting time does not exist on the date due to a 5. If the resulting time does not exist on the date due to a
discontinuity in the time zone, use the semantics in discontinuity in the time zone, use the semantics in
skipping to change at page 10, line 36 skipping to change at line 458
Section 3.3.6). Section 3.3.6).
1.4.7. SignedDuration 1.4.7. SignedDuration
A SignedDuration represents a length of time that may be positive or A SignedDuration represents a length of time that may be positive or
negative and is typically used to express the offset of a point in negative and is typically used to express the offset of a point in
time relative to an associated time. It is represented as a time relative to an associated time. It is represented as a
Duration, optionally preceded by a sign character. It is specified Duration, optionally preceded by a sign character. It is specified
by the following ABNF: by the following ABNF:
signed-duration = ["+" / "-"] duration signed-duration = ["+" / "-"] duration
A negative sign indicates a point in time at or before the associated A negative sign indicates a point in time at or before the associated
time, a positive or no sign a time at or after the associated time. time; a positive or no sign indicates a time at or after the
associated time.
1.4.8. TimeZoneId 1.4.8. TimeZoneId
Where "TimeZoneId" is given as a data type, it means a "String" that Where "TimeZoneId" is given as a data type, it means a "String" that
is either a time zone name in the IANA Time Zone Database [TZDB] or a is either a time zone name in the IANA Time Zone Database [TZDB] or a
custom time zone identifier defined in the "timeZones" property (see custom time zone identifier defined in the "timeZones" property (see
Section 4.7.2). Section 4.7.2).
Where an IANA time zone is specified, the zone rules of the Where an IANA time zone is specified, the zone rules of the
respective zone records apply. Custom time zones are interpreted as respective zone records apply. Custom time zones are interpreted as
described in Section 4.7.2. described in Section 4.7.2.
1.4.9. PatchObject 1.4.9. PatchObject
A PatchObject is of type "String[*]", and represents an unordered set A PatchObject is of type "String[*]" and represents an unordered set
of patches on a JSON object. Each key is a path represented in a of patches on a JSON object. Each key is a path represented in a
subset of JSON pointer format [RFC6901]. The paths have an implicit subset of the JSON Pointer format [RFC6901]. The paths have an
leading "/", so each key is prefixed with "/" before applying the implicit leading "/", so each key is prefixed with "/" before
JSON pointer evaluation algorithm. applying the JSON Pointer evaluation algorithm.
A patch within a PatchObject is only valid if all of the following A patch within a PatchObject is only valid if all of the following
conditions apply: conditions apply:
1. The pointer MUST NOT reference inside an array (i.e., you MUST 1. The pointer MUST NOT reference inside an array (i.e., you MUST
NOT insert/delete from an array; the array MUST be replaced in NOT insert/delete from an array; the array MUST be replaced in
its entirety instead). its entirety instead).
2. All parts prior to the last (i.e., the value after the final 2. All parts prior to the last (i.e., the value after the final
slash) MUST already exist on the object being patched. slash) MUST already exist on the object being patched.
3. There MUST NOT be two patches in the PatchObject where the 3. There MUST NOT be two patches in the PatchObject where the
pointer of one is the prefix of the pointer of the other, e.g., pointer of one is the prefix of the pointer of the other, e.g.,
"alerts/1/offset" and "alerts". "alerts/1/offset" and "alerts".
4. The value for the patch MUST be valid for the property being set 4. The value for the patch MUST be valid for the property being set
(of the correct type and obeying any other applicable (of the correct type and obeying any other applicable
restrictions), or if null the property MUST be optional. restrictions), or, if null, the property MUST be optional.
The value associated with each pointer determines how to apply that The value associated with each pointer determines how to apply that
patch: patch:
o If null, remove the property from the patched object. If the key * If null, remove the property from the patched object. If the key
is not present in the parent, this a no-op. is not present in the parent, this a no-op.
o Anything else: The value to set for this property (this may be a * If non-null, set the value given as the value for this property
replacement or addition to the object being patched). (this may be a replacement or addition to the object being
patched).
A PatchObject does not define its own "@type" property (see A PatchObject does not define its own "@type" property (see
Section 4.1.1). A "@type" property in a patch MUST be handled as any Section 4.1.1). An "@type" property in a patch MUST be handled as
other patched property value. any other patched property value.
Implementations MUST reject in its entirety a PatchObject if any of Implementations MUST reject a PatchObject in its entirety if any of
its patches is invalid. Implementations MUST NOT apply partial its patches are invalid. Implementations MUST NOT apply partial
patches. patches.
The PatchObject format is used to significantly reduce file size and The PatchObject format is used to significantly reduce file size and
duplicated content when specifying variations to a common object, duplicated content when specifying variations to a common object,
such as with recurring events or when translating the data into such as with recurring events or when translating the data into
multiple languages. It can also better preserve semantic intent if multiple languages. It can also better preserve semantic intent if
only the properties that should differ between the two objects are only the properties that should differ between the two objects are
patched. For example, if one person is not going to a particular patched. For example, if one person is not going to a particular
instance of a regularly scheduled event, in iCalendar you would have instance of a regularly scheduled event, in iCalendar, you would have
to duplicate the entire event in the override. In JSCalendar this is to duplicate the entire event in the override. In JSCalendar, this
a small patch to show the difference. As only this property is is a small patch to show the difference. As only this property is
patched, if the location of the event is changed, the occurrence will patched, if the location of the event is changed, the occurrence will
automatically still inherit this. automatically still inherit this.
1.4.10. Relation 1.4.10. Relation
A Relation object defines the relation to other objects, using a A Relation object defines the relation to other objects, using a
possibly empty set of relation types. The object that defines this possibly empty set of relation types. The object that defines this
relation is the linking object, while the other object is the linked relation is the linking object, while the other object is the linked
object. A Relation object has the following properties: object. A Relation object has the following properties:
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be "Relation".
Specifies the type of this object. This MUST be "Relation".
o relation: "String[Boolean]" (optional, default: empty Object)
Describes how the linked object is related to the linking object. relation: "String[Boolean]" (optional, default: empty Object)
The relation is defined as a set of relation types. If empty, the This describes how the linked object is related to the linking
relationship between the two objects is unspecified. object. The relation is defined as a set of relation types. If
empty, the relationship between the two objects is unspecified.
Keys in the set MUST be one of the following values, or specified Keys in the set MUST be one of the following values, specified in
in the property definition where the Relation object is used, or a the property definition where the Relation object is used, a value
value registered in the IANA JSCalendar Enum Values registry, or a registered in the IANA "JSCalendar Enum Values" registry, or a
vendor-specific value (see Section 3.3): vendor-specific value (see Section 3.3):
* "first": The linked object is the first in a series the linking "first": The linked object is the first in a series the linking
object is part of. object is part of.
* "next": The linked object is the next in a series the linking "next": The linked object is next in a series the linking object
object is part of. is part of.
* "child": The linked object is a subpart of the linking object. "child": The linked object is a subpart of the linking object.
* "parent": The linking object is a subpart of the linked object. "parent": The linking object is a subpart of the linked object.
The value for each key in the map MUST be true. The value for each key in the map MUST be true.
1.4.11. Link 1.4.11. Link
A Link object represents an external resource associated with the A Link object represents an external resource associated with the
linking object. It has the following properties: linking object. It has the following properties:
o @type: "String" (mandatory) @type: "String" (mandatory)
Specifies the type of this object. This MUST be "Link". This specifies the type of this object. This MUST be "Link".
o href: "String" (mandatory)
A URI [RFC3986] from which the resource may be fetched. href: "String" (mandatory)
This is a URI [RFC3986] from which the resource may be fetched.
This MAY be a "data:" URL [RFC2397], but it is recommended that This MAY be a "data:" URL [RFC2397], but it is recommended that
the file be hosted on a server to avoid embedding arbitrarily the file be hosted on a server to avoid embedding arbitrarily
large data in JSCalendar object instances. large data in JSCalendar object instances.
o cid: "String" (optional) cid: "String" (optional)
This MUST be a valid "content-id" value according to the This MUST be a valid "content-id" value according to the
definition of Section 2 in [RFC2392]. The value MUST be unique definition of Section 2 of [RFC2392]. The value MUST be unique
within this Link object but has no meaning beyond that. It MAY be within this Link object but has no meaning beyond that. It MAY be
different from the link id for this Link object. different from the link id for this Link object.
o contentType: "String" (optional) contentType: "String" (optional)
This is the media type [RFC6838] of the resource, if known.
The media type [RFC6838] of the resource, if known.
o size: "UnsignedInt" (optional)
The size, in octets, of the resource when fully decoded (i.e., the
number of octets in the file the user would download), if known.
Note that this is an informational estimate, and implementations
must be prepared to handle the actual size being quite different
when the resource is fetched.
o rel: "String" (optional)
Identifies the relation of the linked resource to the object. If size: "UnsignedInt" (optional)
set, the value MUST be a relation type from the IANA registry This is the size, in octets, of the resource when fully decoded
[LINKRELS], as established in [RFC8288]. (i.e., the number of octets in the file the user would download),
if known. Note that this is an informational estimate, and
implementations must be prepared to handle the actual size being
quite different when the resource is fetched.
o display: "String" (optional) rel: "String" (optional)
This identifies the relation of the linked resource to the object.
If set, the value MUST be a relation type from the IANA "Link
Relations" registry [LINKRELS], as established in [RFC8288].
Describes the intended purpose of a link to an image. If set, the display: "String" (optional)
"rel" property MUST be set to "icon". The value MUST be one of This describes the intended purpose of a link to an image. If
the following values, another value registered in the IANA set, the "rel" property MUST be set to "icon". The value MUST be
JSCalendar Enum Values registry, or a vendor-specific value (see one of the following values, another value registered in the IANA
"JSCalendar Enum Values" registry, or a vendor-specific value (see
Section 3.3): Section 3.3):
* "badge": an image meant to be displayed alongside the title of "badge": an image meant to be displayed alongside the title of
the object. the object
* "graphic": a full image replacement for the object itself.
* "fullsize": an image that is used to enhance the object. "graphic": a full image replacement for the object itself
* "thumbnail": a smaller variant of "fullsize" to be used when "fullsize": an image that is used to enhance the object
space for the image is constrained.
o title: "String" (optional) "thumbnail": a smaller variant of "fullsize" to be used when
space for the image is constrained
A human-readable plain-text description of the resource. title: "String" (optional)
This is a human-readable, plain-text description of the resource.
2. JSCalendar Objects 2. JSCalendar Objects
This section describes the calendar object types specified by This section describes the calendar object types specified by
JSCalendar. JSCalendar.
2.1. JSEvent 2.1. Event
Media type: "application/jscalendar+json;type=jsevent" Media type: "application/jscalendar+json;type=event"
A JSEvent represents a scheduled amount of time on a calendar, An Event represents a scheduled amount of time on a calendar,
typically a meeting, appointment, reminder or anniversary. It is typically a meeting, appointment, reminder, or anniversary. It is
required to start at a certain point in time and typically has a non- required to start at a certain point in time and typically has a non-
zero duration. Multiple participants may partake in the event at zero duration. Multiple participants may partake in the event at
multiple locations. multiple locations.
The @type (Section 4.1.1) property value MUST be "jsevent". The @type (Section 4.1.1) property value MUST be "Event".
2.2. JSTask 2.2. Task
Media type: "application/jscalendar+json;type=jstask" Media type: "application/jscalendar+json;type=task"
A JSTask represents an action-item, assignment, to-do or work item. A Task represents an action item, assignment, to-do item, or work
It may start and be due at certain points in time, may take some item. It may start and be due at certain points in time, take some
estimated time to complete, and may recur, none of which is required. estimated time to complete, and recur, none of which is required.
The @type (Section 4.1.1) property value MUST be "jstask". The @type (Section 4.1.1) property value MUST be "Task".
2.3. JSGroup 2.3. Group
Media type: "application/jscalendar+json;type=jsgroup" Media type: "application/jscalendar+json;type=group"
A JSGroup is a collection of JSEvent (Section 2.1) and/or JSTask A Group is a collection of Event (Section 2.1) and/or Task
(Section 2.2) objects. Typically, objects are grouped by topic (Section 2.2) objects. Typically, objects are grouped by topic
(e.g., by keywords) or calendar membership. (e.g., by keywords) or calendar membership.
The @type (Section 4.1.1) property value MUST be "jsgroup". The @type (Section 4.1.1) property value MUST be "Group".
3. Structure of JSCalendar Objects 3. Structure of JSCalendar Objects
A JSCalendar object is a JSON object [RFC8259], which MUST be valid A JSCalendar object is a JSON object [RFC8259], which MUST be valid
I-JSON (a stricter subset of JSON) [RFC7493]. Property names and I-JSON (a stricter subset of JSON) [RFC7493]. Property names and
values are case-sensitive. values are case sensitive.
The object has a collection of properties, as specified in the The object has a collection of properties, as specified in the
following sections. Properties are specified as being either following sections. Properties are specified as being either
mandatory or optional. Optional properties may have a default value, mandatory or optional. Optional properties may have a default value
if explicitly specified in the property definition. if explicitly specified in the property definition.
3.1. Object Type 3.1. Object Type
JSCalendar objects MUST name their type in the "@type" property, if JSCalendar objects MUST name their type in the "@type" property if
not explicitly specified otherwise for the respective object type. A not explicitly specified otherwise for the respective object type. A
notable exception to this rule is the PatchObject (Section 1.4.9). notable exception to this rule is the PatchObject (Section 1.4.9).
3.2. Normalization and Equivalence 3.2. Normalization and Equivalence
JSCalendar aims to provide unambiguous definitions for value types JSCalendar aims to provide unambiguous definitions for value types
and properties, but does not define a general normalization or and properties but does not define a general normalization or
equivalence method for JSCalendar objects and types. This is because equivalence method for JSCalendar objects and types. This is because
the notion of equivalence might range from byte-level equivalence to the notion of equivalence might range from byte-level equivalence to
semantic equivalence, depending on the respective use case. semantic equivalence, depending on the respective use case.
Normalization of JSCalendar objects is hindered because of the Normalization of JSCalendar objects is hindered because of the
following reasons: following reasons:
o Custom JSCalendar properties may contain arbitrary JSON values, * Custom JSCalendar properties may contain arbitrary JSON values,
including arrays. However, equivalence of arrays might or might including arrays. However, equivalence of arrays might or might
not depend on the order of elements, depending on the respective not depend on the order of elements, depending on the respective
property definition. property definition.
o Several JSCalendar property values are defined as URIs and media * Several JSCalendar property values are defined as URIs and media
types, but normalization of these types is inherently protocol- types, but normalization of these types is inherently protocol and
and scheme-specific, depending on the use-case of the equivalence scheme specific, depending on the use case of the equivalence
definition (see Section 6 of [RFC3986]). definition (see Section 6 of [RFC3986]).
Considering this, the definition of equivalence and normalization is Considering this, the definition of equivalence and normalization is
left to client and server implementations and to be negotiated by a left to client and server implementations and to be negotiated by a
calendar exchange protocol or defined elsewhere. calendar exchange protocol or defined elsewhere.
3.3. Vendor-specific Property Extensions, Values and Types 3.3. Vendor-Specific Property Extensions, Values, and Types
Vendors MAY add additional properties to the calendar object to Vendors MAY add additional properties to the calendar object to
support their custom features. To avoid conflict, the names of these support their custom features. To avoid conflict, the names of these
properties MUST be prefixed by a domain name controlled by the vendor properties MUST be prefixed by a domain name controlled by the vendor
followed by a colon, e.g., "example.com:customprop". If the value is followed by a colon, e.g., "example.com:customprop". If the value is
a new JSCalendar object, it either MUST include a "@type" property or a new JSCalendar object, it either MUST include an "@type" property,
it MUST explicitly be specified to not require a type designator. or it MUST explicitly be specified to not require a type designator.
The type name MUST be prefixed with a domain name controlled by the The type name MUST be prefixed with a domain name controlled by the
vendor. vendor.
Some JSCalendar properties allow vendor-specific value extensions. Some JSCalendar properties allow vendor-specific value extensions.
Such vendor-specific values MUST be prefixed by a domain name Such vendor-specific values MUST be prefixed by a domain name
controlled by the vendor followed by a colon, e.g., controlled by the vendor followed by a colon, e.g.,
"example.com:customrel". "example.com:customrel".
Vendors are strongly encouraged to register any new property values Vendors are strongly encouraged to register any new property values
or extensions that are useful to other systems as well, rather than or extensions that are useful to other systems as well, rather than
skipping to change at page 16, line 29 skipping to change at line 728
This section describes the properties that are common to the various This section describes the properties that are common to the various
JSCalendar object types. Specific JSCalendar object types may only JSCalendar object types. Specific JSCalendar object types may only
support a subset of these properties. The object type definitions in support a subset of these properties. The object type definitions in
Section 5 describe the set of supported properties per type. Section 5 describe the set of supported properties per type.
4.1. Metadata Properties 4.1. Metadata Properties
4.1.1. @type 4.1.1. @type
Type: "String" (mandatory). Type: "String" (mandatory)
Specifies the type which this object represents. This MUST be one of
the following values:
o "jsevent": a JSCalendar event (Section 2.1).
o "jstask": a JSCalendar task (Section 2.2).
o "jsgroup": a JSCalendar group (Section 2.3). This specifies the type that this object represents. The allowed
value differs by object type and is defined in Sections 2.1, 2.2, and
2.3.
4.1.2. uid 4.1.2. uid
Type: "String" (mandatory). Type: "String" (mandatory)
A globally unique identifier, used to associate the object as the This is a globally unique identifier used to associate objects
same across different systems, calendars and views. The value of representing the same event, task, group, or other object across
this property MUST be unique across all JSCalendar objects, even if different systems, calendars, and views. For recurring events and
they are of different type. [RFC4122] describes a range of tasks, the UID is associated with the base object and therefore is
established algorithms to generate universally unique identifiers the same for all occurrences; the combination of the UID with a
(UUID). UUID version 4, described in Section 4.4 of [RFC4122], is "recurrenceId" identifies a particular instance.
RECOMMENDED.
For compatibility with [RFC5545] UIDs, implementations MUST be able The generator of the identifier MUST guarantee that the identifier is
unique. [RFC4122] describes a range of established algorithms to
generate universally unique identifiers (UUIDs). UUID version 4,
described in Section 4.4 of [RFC4122], is RECOMMENDED.
For compatibility with UIDs [RFC5545], implementations MUST be able
to receive and persist values of at least 255 octets for this to receive and persist values of at least 255 octets for this
property, but they MUST NOT truncate values in the middle of a UTF-8 property, but they MUST NOT truncate values in the middle of a UTF-8
multi-octet sequence. multi-octet sequence.
4.1.3. relatedTo 4.1.3. relatedTo
Type: "String[Relation]" (optional). Type: "String[Relation]" (optional)
Relates the object to other JSCalendar objects. This is represented This relates the object to other JSCalendar objects. This is
as a map of the UIDs of the related objects to information about the represented as a map of the UIDs of the related objects to
relation. information about the relation.
If an object is split to make a "this and future" change to a If an object is split to make a "this and future" change to a
recurrence, the original object MUST be truncated to end at the recurrence, the original object MUST be truncated to end at the
previous occurrence before this split, and a new object created to previous occurrence before this split, and a new object is created to
represent all the occurrences after the split. A "next" relation represent all the occurrences after the split. A "next" relation
MUST be set on the original object's relatedTo property for the UID MUST be set on the original object's "relatedTo" property for the UID
of the new object. A "first" relation for the UID of the first of the new object. A "first" relation for the UID of the first
object in the series MUST be set on the new object. Clients can then object in the series MUST be set on the new object. Clients can then
follow these UIDs to get the complete set of objects if the user follow these UIDs to get the complete set of objects if the user
wishes to modify them all at once. wishes to modify them all at once.
4.1.4. prodId 4.1.4. prodId
Type: "String" (optional). Type: "String" (optional)
The identifier for the product that last updated the JSCalendar This is the identifier for the product that last updated the
object. This should be set whenever the data in the object is JSCalendar object. This should be set whenever the data in the
modified (i.e., whenever the "updated" property is set). object is modified (i.e., whenever the "updated" property is set).
The vendor of the implementation MUST ensure that this is a globally The vendor of the implementation MUST ensure that this is a globally
unique identifier, using some technique such as an FPI value, as unique identifier, using some technique such as a Formal Public
defined in [ISO.9070.1991]. Identifier (FPI) value, as defined in [ISO.9070.1991].
This property SHOULD NOT be used to alter the interpretation of a This property SHOULD NOT be used to alter the interpretation of a
JSCalendar object beyond the semantics specified in this document. JSCalendar object beyond the semantics specified in this document.
For example, it is not to be used to further the understanding of For example, it is not to be used to further the understanding of
non-standard properties, a practice that is known to cause long-term nonstandard properties, a practice that is known to cause long-term
interoperability problems. interoperability problems.
4.1.5. created 4.1.5. created
Type: "UTCDateTime" (optional). Type: "UTCDateTime" (optional)
The date and time this object was initially created. This is the date and time this object was initially created.
4.1.6. updated 4.1.6. updated
Type: "UTCDateTime" (mandatory). Type: "UTCDateTime" (mandatory)
The date and time the data in this object was last modified (or its This is the date and time the data in this object was last modified
creation date/time if not modified since). (or its creation date/time if not modified since).
4.1.7. sequence 4.1.7. sequence
Type: "UnsignedInt" (optional, default: 0). Type: "UnsignedInt" (optional, default: 0)
Initially zero, this MUST be incremented by one every time a change Initially zero, this MUST be incremented by one every time a change
is made to the object, except if the change only modifies the is made to the object, except if the change only modifies the
"participants" property (see Section 4.4.5). "participants" property (see Section 4.4.6).
This is used as part of iTIP [RFC5546] to know which version of the This is used as part of the iCalendar Transport-independent
object a scheduling message relates to. Interoperability Protocol (iTIP) [RFC5546] to know which version of
the object a scheduling message relates to.
4.1.8. method 4.1.8. method
Type: "String" (optional). Type: "String" (optional)
The iTIP [RFC5546] method, in lowercase. This MUST only be present This is the iTIP [RFC5546] method, in lowercase. This MUST only be
if the JSCalendar object represents an iTIP scheduling message. present if the JSCalendar object represents an iTIP scheduling
message.
4.2. What and Where Properties 4.2. What and Where Properties
4.2.1. title 4.2.1. title
Type: "String" (optional, default: empty String). Type: "String" (optional, default: empty String)
A short summary of the object. This is a short summary of the object.
4.2.2. description 4.2.2. description
Type: "String" (optional, default: empty String). Type: "String" (optional, default: empty String)
A longer-form text description of the object. The content is This is a longer-form text description of the object. The content is
formatted according to the "descriptionContentType" property. formatted according to the "descriptionContentType" property.
4.2.3. descriptionContentType 4.2.3. descriptionContentType
Type: "String" (optional, default: "text/plain"). Type: "String" (optional, default: "text/plain")
Describes the media type [RFC6838] of the contents of the This describes the media type [RFC6838] of the contents of the
"description" property. Media types MUST be sub-types of type "description" property. Media types MUST be subtypes of type "text"
"text", and SHOULD be "text/plain" or "text/html" [MEDIATYPES]. They and SHOULD be "text/plain" or "text/html" [MEDIATYPES]. They MAY
MAY include parameters and the "charset" parameter value MUST be include parameters, and the "charset" parameter value MUST be "utf-
"utf-8", if specified. Descriptions of type "text/html" MAY contain 8", if specified. Descriptions of type "text/html" MAY contain "cid"
"cid" URLs [RFC2392] to reference links in the calendar object by use URLs [RFC2392] to reference links in the calendar object by use of
of the "cid" property of the Link object. the "cid" property of the Link object.
4.2.4. showWithoutTime 4.2.4. showWithoutTime
Type: "Boolean" (optional, default: false). Type: "Boolean" (optional, default: false)
Indicates that the time is not important to display to the user when This indicates that the time is not important to display to the user
rendering this calendar object. An example of this is an event that when rendering this calendar object. An example of this is an event
conceptually occurs all day or across multiple days, such as "New that conceptually occurs all day or across multiple days, such as
Year's Day" or "Italy Vacation". While the time component is "New Year's Day" or "Italy Vacation". While the time component is
important for free-busy calculations and checking for scheduling important for free-busy calculations and checking for scheduling
clashes, calendars may choose to omit displaying it and/or display clashes, calendars may choose to omit displaying it and/or display
the object separately to other objects to enhance the user's view of the object separately to other objects to enhance the user's view of
their schedule. their schedule.
Such events are also commonly known as "all-day" events. Such events are also commonly known as "all-day" events.
4.2.5. locations 4.2.5. locations
Type: "Id[Location]" (optional). Type: "Id[Location]" (optional)
A map of location ids to Location objects, representing locations This is a map of location ids to Location objects, representing
associated with the object. locations associated with the object.
A Location object has the following properties. It MUST have at A Location object has the following properties. It MUST have at
least one property other than the "relativeTo" property. least one property other than the "relativeTo" property.
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be "Location".
Specifies the type of this object. This MUST be "Location".
o name: "String" (optional)
The human-readable name of the location.
o description: "String" (optional)
Human-readable, plain-text instructions for accessing this
location. This may be an address, set of directions, door access
code, etc.
o locationTypes: "String[Boolean]" (optional) name: "String" (optional)
This is the human-readable name of the location.
A set of one or more location types that describe this location. description: "String" (optional)
All types MUST be from the Location Types Registry [LOCATIONTYPES] This is the human-readable, plain-text instructions for accessing
as defined in [RFC4589]. The set is represented as a map, with this location. This may be an address, set of directions, door
the keys being the location types. The value for each key in the access code, etc.
map MUST be true.
o relativeTo: "String" (optional) locationTypes: "String[Boolean]" (optional)
This is a set of one or more location types that describe this
location. All types MUST be from the "Location Types Registry"
[LOCATIONTYPES], as defined in [RFC4589]. The set is represented
as a map, with the keys being the location types. The value for
each key in the map MUST be true.
Specifies the relation between this location and the time of the relativeTo: "String" (optional)
JSCalendar object. This is primarily to allow events representing This specifies the relation between this location and the time of
travel to specify the location of departure (at the start of the the JSCalendar object. This is primarily to allow events
event) and location of arrival (at the end); this is particularly representing travel to specify the location of departure (at the
important if these locations are in different time zones, as a start of the event) and location of arrival (at the end); this is
client may wish to highlight this information for the user. particularly important if these locations are in different time
zones, as a client may wish to highlight this information for the
user.
This MUST be one of the following values, another value registered This MUST be one of the following values, another value registered
in the IANA JSCalendar Enum Values registry, or a vendor-specific in the IANA "JSCalendar Enum Values" registry, or a vendor-
value (see Section 3.3). Any value the client or server doesn't specific value (see Section 3.3). Any value the client or server
understand should be treated the same as if this property is doesn't understand should be treated the same as if this property
omitted. is omitted.
* "start": The event/task described by this JSCalendar object "start": The event/task described by this JSCalendar object
occurs at this location at the time the event/task starts. occurs at this location at the time the event/task starts.
* "end": The event/task described by this JSCalendar object "end": The event/task described by this JSCalendar object occurs
occurs at this location at the time the event/task ends. at this location at the time the event/task ends.
o timeZone: "TimeZoneId" (optional)
A time zone for this location.
o coordinates: "String" (optional)
A "geo:" URI [RFC5870] for the location. timeZone: "TimeZoneId" (optional)
This is a time zone for this location.
o links: "Id[Link]" (optional) coordinates: "String" (optional)
This is a "geo:" URI [RFC5870] for the location.
A map of link ids to Link objects, representing external resources links: "Id[Link]" (optional)
associated with this location, for example a vCard or image. If This is a map of link ids to Link objects, representing external
there are no links, this MUST be omitted (rather than specified as resources associated with this location, for example, a vCard or
an empty set). image. If there are no links, this MUST be omitted (rather than
specified as an empty set).
4.2.6. virtualLocations 4.2.6. virtualLocations
Type: "Id[VirtualLocation]" (optional). Type: "Id[VirtualLocation]" (optional)
A map of virtual location ids to VirtualLocation objects, This is a map of virtual location ids to VirtualLocation objects,
representing virtual locations, such as video conferences or chat representing virtual locations, such as video conferences or chat
rooms, associated with the object. rooms, associated with the object.
A VirtualLocation object has the following properties. A VirtualLocation object has the following properties.
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be
Specifies the type of this object. This MUST be
"VirtualLocation". "VirtualLocation".
o name: "String" (optional, default: empty String) name: "String" (optional, default: empty String)
This is the human-readable name of the virtual location.
The human-readable name of the virtual location.
o description: "String" (optional)
Human-readable plain-text instructions for accessing this virtual
location. This may be a conference access code, etc.
o uri: "String" (mandatory) description: "String" (optional)
These are human-readable plain-text instructions for accessing
this virtual location. This may be a conference access code, etc.
A URI [RFC3986] that represents how to connect to this virtual uri: "String" (mandatory)
location. This is a URI [RFC3986] that represents how to connect to this
virtual location.
This may be a telephone number (represented using the "tel:" This may be a telephone number (represented using the "tel:"
scheme, e.g., "tel:+1-555-555-5555") for a teleconference, a web scheme, e.g., "tel:+1-555-555-5555") for a teleconference, a web
address for online chat, or any custom URI. address for online chat, or any custom URI.
features: "String[Boolean]" (optional)
A set of features supported by this virtual location. The set is
represented as a map, with the keys being the feature. The value
for each key in the map MUST be true.
The feature MUST be one of the following values, another value
registered in the IANA "JSCalendar Enum Values" registry, or a
vendor-specific value (see Section 3.3). Any value the client or
server doesn't understand should be treated the same as if this
feature is omitted.
audio: Audio conferencing
chat: Chat or instant messaging
feed: Blog or atom feed
moderator: Provides moderator-specific features
phone: Phone conferencing
screen: Screen sharing
video: Video conferencing
4.2.7. links 4.2.7. links
Type: "Id[Link]" (optional). Type: "Id[Link]" (optional)
A map of link ids to Link objects, representing external resources This is a map of link ids to Link objects, representing external
associated with the object. resources associated with the object.
Links with a rel of "enclosure" MUST be considered by the client as Links with a rel of "enclosure" MUST be considered by the client to
attachments for download. be attachments for download.
Links with a rel of "describedby" MUST be considered by the client to Links with a rel of "describedby" MUST be considered by the client to
be an alternative representation of the description. be alternative representations of the description.
Links with a rel of "icon" MUST be considered by the client to be an Links with a rel of "icon" MUST be considered by the client to be
image that it may use when presenting the calendar data to a user. images that it may use when presenting the calendar data to a user.
The "display" property may be set to indicate the purpose of this The "display" property may be set to indicate the purpose of this
image. image.
4.2.8. locale 4.2.8. locale
Type: "String" (optional). Type: "String" (optional)
The language tag as defined in [RFC5646] that best describes the This is the language tag, as defined in [BCP47], that best describes
locale used for the text in the calendar object, if known. the locale used for the text in the calendar object, if known.
4.2.9. keywords 4.2.9. keywords
Type: "String[Boolean]" (optional). Type: "String[Boolean]" (optional)
A set of keywords or tags that relate to the object. The set is This is a set of keywords or tags that relate to the object. The set
represented as a map, with the keys being the keywords. The value is represented as a map, with the keys being the keywords. The value
for each key in the map MUST be true. for each key in the map MUST be true.
4.2.10. categories 4.2.10. categories
Type: "String[Boolean]" (optional). Type: "String[Boolean]" (optional)
A set of categories that relate to the calendar object. The set is This is a set of categories that relate to the calendar object. The
represented as a map, with the keys being the categories specified as set is represented as a map, with the keys being the categories
URIs. The value for each key in the map MUST be true. specified as URIs. The value for each key in the map MUST be true.
In contrast to keywords, categories typically are structured. For In contrast to keywords, categories are typically structured. For
example, a vendor owning the domain "example.com" might define the example, a vendor owning the domain "example.com" might define the
categories "http://example.com/categories/sports/american-football" categories "http://example.com/categories/sports/american-football"
and "http://example.com/categories/music/r-b". and "http://example.com/categories/music/r-b".
4.2.11. color 4.2.11. color
Type: "String" (optional). Type: "String" (optional)
A color clients MAY use when displaying this calendar object. The This is a color clients MAY use when displaying this calendar object.
value is a color name taken from the set of names defined in The value is a color name taken from the set of names defined in
Section 4.3 of CSS Color Module Level 3 [COLORS], or an RGB value in Section 4.3 of CSS Color Module Level 3 [COLORS] or an RGB value in
hexadecimal notation, as defined in Section 4.2.1 of CSS Color Module hexadecimal notation, as defined in Section 4.2.1 of CSS Color Module
Level 3. Level 3.
4.3. Recurrence Properties 4.3. Recurrence Properties
Some events and tasks occur at regular or irregular intervals. Some events and tasks occur at regular or irregular intervals.
Rather than having to copy the data for every occurrence there can be Rather than having to copy the data for every occurrence, there can
a master event with rules to generate recurrences, and/or overrides be a base event with rules to generate recurrences and/or overrides
that add extra dates or exceptions to the rules. that add extra dates or exceptions to the rules.
The recurrence set is the complete set of instances for an object. The recurrence set is the complete set of instances for an object.
It is generated by considering the following properties in order, all It is generated by considering the following properties in order, all
of which are optional: of which are optional:
1. The recurrenceRules property (Section 4.3.2) generates a set of 1. The "recurrenceRules" property (Section 4.3.3) generates a set of
extra date-times on which the object occurs. extra date-times on which the object occurs.
2. The excludedRecurrenceRules property (Section 4.3.3) generates a 2. The "excludedRecurrenceRules" property (Section 4.3.4) generates
set of date-times that are to be removed from the previously a set of date-times that are to be removed from the previously
generated set of date-times on which the object occurs. generated set of date-times on which the object occurs.
3. The recurrenceOverrides property (Section 4.3.4) defines date- 3. The "recurrenceOverrides" property (Section 4.3.5) defines date-
times which are added or excluded to form the final set. (This times that are added or excluded to form the final set. (This
property may also contain changes to the object to apply to property may also contain changes to the object to apply to
particular instances.) particular instances.)
4.3.1. recurrenceId 4.3.1. recurrenceId
Type: "LocalDateTime" (optional). Type: "LocalDateTime" (optional)
If present, this JSCalendar object represents one occurrence of a If present, this JSCalendar object represents one occurrence of a
recurring JSCalendar object. If present the "recurrenceRules" and recurring JSCalendar object. If present, the "recurrenceRules" and
"recurrenceOverrides" properties MUST NOT be present. "recurrenceOverrides" properties MUST NOT be present.
The value is a date-time either produced by the "recurrenceRules" of The value is a date-time either produced by the "recurrenceRules" of
the master event, or added as a key to the "recurrenceOverrides" the base event or added as a key to the "recurrenceOverrides"
property of the master event. property of the base event.
4.3.2. recurrenceRules 4.3.2. recurrenceIdTimeZone
Type: "RecurrenceRule[]" (optional). Type: "TimeZoneId|null" (optional, default: null)
Defines a set of recurrence rules (repeating patterns) for recurring Identifies the time zone of the main JSCalendar object, of which this
calendar objects. JSCalendar object is a recurrence instance. This property MUST be
set if the "recurrenceId" property is set. It MUST NOT be set if the
"recurrenceId" property is not set.
A JSEvent recurs by applying the recurrence rules to the "start" 4.3.3. recurrenceRules
date-time.
A JSTask recurs by applying the recurrence rules to the "start" date- Type: "RecurrenceRule[]" (optional)
time, if defined, otherwise it recurs by the "due" date-time, if
This defines a set of recurrence rules (repeating patterns) for
recurring calendar objects.
An Event recurs by applying the recurrence rules to the "start" date-
time.
A Task recurs by applying the recurrence rules to the "start" date-
time, if defined; otherwise, it recurs by the "due" date-time, if
defined. If the task defines neither a "start" nor "due" date-time, defined. If the task defines neither a "start" nor "due" date-time,
it MUST NOT define a "recurrenceRules" property. it MUST NOT define a "recurrenceRules" property.
If multiple recurrence rules are given, each rule is to be applied If multiple recurrence rules are given, each rule is to be applied,
and then the union of the results used, ignoring any duplicates. and then the union of the results are used, ignoring any duplicates.
A RecurrenceRule object is a JSON object mapping of a RECUR value A RecurrenceRule object is a JSON object mapping of a RECUR value
type in iCalendar [RFC5545] [RFC7529] and has the same semantics. It type in iCalendar [RFC5545] [RFC7529] and has the same semantics. It
has the following properties: has the following properties:
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be
Specifies the type of this object. This MUST be "RecurrenceRule". "RecurrenceRule".
o frequency: "String" (mandatory)
The time span covered by each iteration of this recurrence rule frequency: "String" (mandatory)
(see Section 4.3.2.1 for full semantics). This MUST be one of the This is the time span covered by each iteration of this recurrence
following values: rule (see Section 4.3.3.1 for full semantics). This MUST be one
of the following values:
* "yearly" * "yearly"
* "monthly" * "monthly"
* "weekly" * "weekly"
* "daily" * "daily"
* "hourly" * "hourly"
* "minutely" * "minutely"
* "secondly" * "secondly"
This is the FREQ part from iCalendar, converted to lowercase. This is the FREQ part from iCalendar, converted to lowercase.
o interval: "UnsignedInt" (optional, default: 1) interval: "UnsignedInt" (optional, default: 1)
This is the interval of iteration periods at which the recurrence
The interval of iteration periods at which the recurrence repeats. repeats. If included, it MUST be an integer >= 1.
If included, it MUST be an integer >= 1.
This is the INTERVAL part from iCalendar. This is the INTERVAL part from iCalendar.
o rscale: "String" (optional, default: "gregorian") rscale: "String" (optional, default: "gregorian")
This is the calendar system in which this recurrence rule
The calendar system in which this recurrence rule operates, in operates, in lowercase. This MUST be either a CLDR-registered
lowercase. This MUST be either a CLDR-registered calendar system calendar system name [CLDR] or a vendor-specific value (see
name [CLDR], or a vendor-specific value (see Section 3.3). Section 3.3).
This is the RSCALE part from iCalendar RSCALE [RFC7529], converted This is the RSCALE part from iCalendar RSCALE [RFC7529], converted
to lowercase. to lowercase.
o skip: "String" (optional, default: "omit") skip: "String" (optional, default: "omit")
This is the behavior to use when the expansion of the recurrence
The behaviour to use when the expansion of the recurrence produces produces invalid dates. This property only has an effect if the
invalid dates. This property only has an effect if the frequency frequency is "yearly" or "monthly". It MUST be one of the
is "yearly" or "monthly". It MUST be one of the following values: following values:
* "omit" * "omit"
* "backward" * "backward"
* "forward" * "forward"
This is the SKIP part from iCalendar RSCALE [RFC7529], converted This is the SKIP part from iCalendar RSCALE [RFC7529], converted
to lowercase. to lowercase.
o firstDayOfWeek: "String" (optional, default: "mo") firstDayOfWeek: "String" (optional, default: "mo")
The day on which the week is considered to start, represented as a This is the day on which the week is considered to start,
lowercase abbreviated two-letter English day of the week. If represented as a lowercase, abbreviated, and two-letter English
included, it MUST be one of the following values: day of the week. If included, it MUST be one of the following
values:
* "mo" * "mo"
* "tu" * "tu"
* "we" * "we"
* "th" * "th"
* "fr" * "fr"
* "sa" * "sa"
* "su" * "su"
This is the WKST part from iCalendar. This is the WKST part from iCalendar.
o byDay: "NDay[]" (optional) byDay: "NDay[]" (optional)
These are days of the week on which to repeat. An "NDay" object
Days of the week on which to repeat. An "NDay" object has the has the following properties:
following properties:
* @type: "String" (mandatory)
Specifies the type of this object. This MUST be "NDay".
* day: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be "NDay".
A day of the week on which to repeat; the allowed values are day: "String" (mandatory)
the same as for the "firstDayOfWeek" RecurrenceRule property. This is a day of the week on which to repeat; the allowed
values are the same as for the "firstDayOfWeek" recurrenceRule
property.
This is the day-of-the-week of the BYDAY part in iCalendar, This is the day of the week of the BYDAY part in iCalendar,
converted to lowercase. converted to lowercase.
* nthOfPeriod: "Int" (optional) nthOfPeriod: "Int" (optional)
If present, rather than representing every occurrence of the If present, rather than representing every occurrence of the
weekday defined in the "day" property, it represents only a weekday defined in the "day" property, it represents only a
specific instance within the recurrence period. The value can specific instance within the recurrence period. The value can
be positive or negative, but MUST NOT be zero. A negative be positive or negative but MUST NOT be zero. A negative
integer means nth-last of period. integer means the nth-last occurrence within that period (i.e.,
-1 is the last occurrence, -2 the one before that, etc.).
This is the ordinal part of the BYDAY value in iCalendar (e.g., This is the ordinal part of the BYDAY value in iCalendar (e.g.,
1 or -3). 1 or -3).
o byMonthDay: "Int[]" (optional) byMonthDay: "Int[]" (optional)
These are the days of the month on which to repeat. Valid values
Days of the month on which to repeat. Valid values are between 1 are between 1 and the maximum number of days any month may have in
and the maximum number of days any month may have in the calendar the calendar given by the "rscale" property and the negative
given by the "rscale" property, and the negative values of these values of these numbers. For example, in the Gregorian calendar,
numbers. For example, in the Gregorian calendar valid values are valid values are 1 to 31 and -31 to -1. Negative values offset
1 to 31 and -31 to -1. Negative values offset from the end of the from the end of the month. The array MUST have at least one entry
month. The array MUST have at least one entry if included. if included.
This is the BYMONTHDAY part in iCalendar. This is the BYMONTHDAY part in iCalendar.
o byMonth: "String[]" (optional) byMonth: "String[]" (optional)
These are the months in which to repeat. Each entry is a string
The months in which to repeat. Each entry is a string
representation of a number, starting from "1" for the first month representation of a number, starting from "1" for the first month
in the calendar (e.g., "1" means January with the Gregorian in the calendar (e.g., "1" means January with the Gregorian
calendar), with an optional "L" suffix (see [RFC7529]) for leap calendar), with an optional "L" suffix (see [RFC7529]) for leap
months (this MUST be uppercase, e.g., "3L"). The array MUST have months (this MUST be uppercase, e.g., "3L"). The array MUST have
at least one entry if included. at least one entry if included.
This is the BYMONTH part from iCalendar. This is the BYMONTH part from iCalendar.
o byYearDay: "Int[]" (optional) byYearDay: "Int[]" (optional)
These are the days of the year on which to repeat. Valid values
The days of the year on which to repeat. Valid values are between are between 1 and the maximum number of days any year may have in
1 and the maximum number of days any year may have in the calendar the calendar given by the "rscale" property and the negative
given by the "rscale" property, and the negative values of these values of these numbers. For example, in the Gregorian calendar,
numbers. For example, in the Gregorian calendar valid values are valid values are 1 to 366 and -366 to -1. Negative values offset
1 to 366 and -366 to -1. Negative values offset from the end of from the end of the year. The array MUST have at least one entry
the year. The array MUST have at least one entry if included. if included.
This is the BYYEARDAY part from iCalendar. This is the BYYEARDAY part from iCalendar.
o byWeekNo: "Int[]" (optional) byWeekNo: "Int[]" (optional)
These are the weeks of the year in which to repeat. Valid values
Weeks of the year in which to repeat. Valid values are between 1 are between 1 and the maximum number of weeks any year may have in
and the maximum number of weeks any year may have in the calendar the calendar given by the "rscale" property and the negative
given by the "rscale" property, and the negative values of these values of these numbers. For example, in the Gregorian calendar,
numbers. For example, in the Gregorian calendar valid values are valid values are 1 to 53 and -53 to -1. The array MUST have at
1 to 53 and -53 to -1. The array MUST have at least one entry if least one entry if included.
included.
This is the BYWEEKNO part from iCalendar. This is the BYWEEKNO part from iCalendar.
o byHour: "UnsignedInt[]" (optional) byHour: "UnsignedInt[]" (optional)
The hours of the day in which to repeat. Valid values are 0 to These are the hours of the day in which to repeat. Valid values
23. The array MUST have at least one entry if included. This is are 0 to 23. The array MUST have at least one entry if included.
the BYHOUR part from iCalendar. This is the BYHOUR part from iCalendar.
o byMinute: "UnsignedInt[]" (optional)
The minutes of the hour in which to repeat. Valid values are 0 to byMinute: "UnsignedInt[]" (optional)
59. The array MUST have at least one entry if included. These are the minutes of the hour in which to repeat. Valid
values are 0 to 59. The array MUST have at least one entry if
included.
This is the BYMINUTE part from iCalendar. This is the BYMINUTE part from iCalendar.
o bySecond: "UnsignedInt[]" (optional) bySecond: "UnsignedInt[]" (optional)
These are the seconds of the minute in which to repeat. Valid
The seconds of the minute in which to repeat. Valid values are 0 values are 0 to 60. The array MUST have at least one entry if
to 60. The array MUST have at least one entry if included. included.
This is the BYSECOND part from iCalendar. This is the BYSECOND part from iCalendar.
o bySetPosition: "Int[]" (optional) bySetPosition: "Int[]" (optional)
These are the occurrences within the recurrence interval to
The occurrences within the recurrence interval to include in the include in the final results. Negative values offset from the end
final results. Negative values offset from the end of the list of of the list of occurrences. The array MUST have at least one
occurrences. The array MUST have at least one entry if included. entry if included. This is the BYSETPOS part from iCalendar.
This is the BYSETPOS part from iCalendar.
o count: "UnsignedInt" (optional)
The number of occurrences at which to range-bound the recurrence. count: "UnsignedInt" (optional)
This MUST NOT be included if an "until" property is specified. These are the number of occurrences at which to range-bound the
recurrence. This MUST NOT be included if an "until" property is
specified.
This is the COUNT part from iCalendar. This is the COUNT part from iCalendar.
o until: "LocalDateTime" (optional) until: "LocalDateTime" (optional)
These are the date-time at which to finish recurring. The last
The date-time at which to finish recurring. The last occurrence occurrence is on or before this date-time. This MUST NOT be
is on or before this date-time. This MUST NOT be included if a included if a "count" property is specified. Note that if not
"count" property is specified. Note: if not specified otherwise specified otherwise for a specific JSCalendar object, this date is
for a specific JSCalendar object, this date is to be interpreted to be interpreted in the time zone specified in the JSCalendar
in the time zone specified in the JSCalendar object's "timeZone" object's "timeZone" property.
property.
This is the UNTIL part from iCalendar. This is the UNTIL part from iCalendar.
4.3.2.1. Interpreting recurrence rules 4.3.3.1. Interpreting Recurrence Rules
A recurrence rule specifies a set of date-times for recurring A recurrence rule specifies a set of date-times for recurring
calendar objects. A recurrence rule has the following semantics. calendar objects. A recurrence rule has the following semantics.
Note, wherever "year", "month" or "day of month" is used, this is Note that wherever "year", "month", or "day of month" is used, this
within the calendar system given by the "rscale" property, which is within the calendar system given by the "rscale" property, which
defaults to "gregorian" if omitted. defaults to "gregorian" if omitted.
1. A set of candidates is generated. This is every second within a 1. A set of candidates is generated. This is every second within a
period defined by the frequency property value: period defined by the "frequency" property value:
* "yearly": every second from midnight on the 1st day of a year "yearly": every second from midnight on the first day of a year
(inclusive) to midnight the 1st day of the following year (inclusive) to midnight the first day of the following year
(exclusive). (exclusive).
If skip is not "omit", the calendar system has leap months and If skip is not "omit", the calendar system has leap months,
there is a byMonth property, generate candidates for the leap and there is a "byMonth" property, generate candidates for the
months even if they don't occur in this year. leap months, even if they don't occur in this year.
If skip is not "omit" and there is a byMonthDay property, If skip is not "omit" and there is a "byMonthDay" property,
presume each month has the maximum number of days any month presume each month has the maximum number of days any month
may have in this calendar system when generating candidates, may have in this calendar system when generating candidates,
even if it's more than this month actually has. even if it's more than this month actually has.
* "monthly": every second from midnight on the 1st day of a "monthly": every second from midnight on the first day of a
month (inclusive) to midnight on the 1st of the following month (inclusive) to midnight on the first of the following
month (exclusive). month (exclusive).
If skip is not "omit" and there is a byMonthDay property, If skip is not "omit" and there is a "byMonthDay" property,
presume the month has the maximum number of days any month may presume the month has the maximum number of days any month may
have in this calendar system when generating candidates, even have in this calendar system when generating candidates, even
if it's more than this month actually has. if it's more than this month actually has.
* "weekly": every second from midnight (inclusive) on the first "weekly": every second from midnight (inclusive) on the first
day of the week (as defined by the firstDayOfWeek property, or day of the week (as defined by the "firstDayOfWeek" property
Monday if omitted), to midnight 7 days later (exclusive). or Monday if omitted) to midnight seven days later
(exclusive).
* "daily": every second from midnight at the start of the day "daily": every second from midnight at the start of the day
(inclusive) to midnight at the end of the day (exclusive). (inclusive) to midnight at the end of the day (exclusive).
* "hourly": every second from the beginning of the hour "hourly": every second from the beginning of the hour
(inclusive) to the beginning of the next hour (exclusive). (inclusive) to the beginning of the next hour (exclusive).
* "minutely": every second from the beginning of the minute "minutely": every second from the beginning of the minute
(inclusive) to the beginning of the next minute (exclusive). (inclusive) to the beginning of the next minute (exclusive).
* "secondly": the second itself, only. "secondly": only the second itself.
2. Each date-time candidate is compared against all of the byX 2. Each date-time candidate is compared against all of the byX
properties of the rule except bySetPosition. If any property in properties of the rule except bySetPosition. If any property in
the rule does not match the date-time, the date-time is the rule does not match the date-time, the date-time is
eliminated. Each byX property is an array; the date-time matches eliminated. Each byX property is an array; the date-time matches
the property if it matches any of the values in the array. The the property if it matches any of the values in the array. The
properties have the following semantics: properties have the following semantics:
* byMonth: the date-time is in the given month. byMonth: The date-time is in the given month.
* byWeekNo: the date-time is in the nth week of the year. byWeekNo: The date-time is in the nth week of the year.
Negative numbers mean the nth last week of the year. This Negative numbers mean the nth last week of the year. This
corresponds to weeks according to week numbering as defined in corresponds to weeks according to week numbering, as defined
ISO.8601.2004, with a week defined as a seven day period, in ISO.8601.2004, with a week defined as a seven-day period,
starting on the firstDayOfWeek property value or Monday if starting on the "firstDayOfWeek" property value or Monday if
omitted. Week number one of the calendar year is the first omitted. Week number one of the calendar year is the first
week that contains at least four days in that calendar year. week that contains at least four days in that calendar year.
If the date-time is not valid (this may happen when generating If the date-time is not valid (this may happen when generating
candidates with a skip property in effect), it is always candidates with a "skip" property in effect), it is always
eliminated by this property. eliminated by this property.
* byYearDay: the date-time is on the nth day of year. Negative byYearDay: The date-time is on the nth day of year. Negative
numbers mean the nth last day of the year. numbers mean the nth last day of the year.
If the date-time is not valid (this may happen when generating If the date-time is not valid (this may happen when generating
candidates with a skip property in effect), it is always candidates with a "skip" property in effect), it is always
eliminated by this property. eliminated by this property.
* byMonthDay: the date-time is on the given day of the month. byMonthDay: The date-time is on the given day of the month.
Negative numbers mean the nth last day of the month. Negative numbers mean the nth last day of the month.
* byDay: the date-time is on the given day of the week. If the byDay: The date-time is on the given day of the week. If the
day is prefixed by a number, it is the nth occurrence of that day is prefixed by a number, it is the nth occurrence of that
day of the week within the month (if frequency is monthly) or day of the week within the month (if frequency is monthly) or
year (if frequency is yearly). Negative numbers means nth year (if frequency is yearly). Negative numbers mean the nth
last occurrence within that period. last occurrence within that period.
* byHour: the date-time has the given hour value. byHour: The date-time has the given hour value.
* byMinute: the date-time has the given minute value. byMinute: The date-time has the given minute value.
* bySecond: the date-time has the given second value. bySecond: The date-time has the given second value.
If a skip property is defined and is not "omit", there may be If a "skip" property is defined and is not "omit", there may be
candidates that do not correspond to valid dates (e.g., 31st candidates that do not correspond to valid dates (e.g., February
February in the Gregorian calendar). In this case, the 31st in the Gregorian calendar). In this case, the properties
properties MUST be considered in the order above and: MUST be considered in the order above, and:
1. After applying the byMonth filter, if the candidate's month 1. After applying the byMonth filter, if the candidate's month
is invalid for the given year, increment it (if skip is is invalid for the given year, increment it (if skip is
"forward") or decrement it (if skip is "backward") until a "forward") or decrement it (if skip is "backward") until a
valid month is found, incrementing/decrementing the year as valid month is found, incrementing/decrementing the year as
well if passing through the beginning/end of the year. This well if passing through the beginning/end of the year. This
only applies to calendar systems with leap months. only applies to calendar systems with leap months.
2. After applying the byMonthDay filter, if the day of the month 2. After applying the byMonthDay filter, if the day of the month
is invalid for the given month and year, change the date to is invalid for the given month and year, change the date to
the first day of the next month (if skip is "forward") or the the first day of the next month (if skip is "forward") or the
last day of the current month (if skip is "backward"). last day of the current month (if skip is "backward").
3. If any valid date produced after applying the skip is already 3. If any valid date produced after applying the skip is already
a candidate, eliminate the duplicate. (For example after a candidate, eliminate the duplicate. (For example, after
adjusting, 30th February and 31st February would both become adjusting, February 30th and February 31st would both become
the same "real" date, so one is eliminated as a duplicate.) the same "real" date, so one is eliminated as a duplicate.)
3. If a bySetPosition property is included, this is now applied to 3. If a "bySetPosition" property is included, this is now applied to
the ordered list of remaining dates. This property specifies the the ordered list of remaining dates. This property specifies the
indexes of date-times to keep; all others should be eliminated. indexes of date-times to keep; all others should be eliminated.
Negative numbers are indexes from the end of the list, with -1 Negative numbers are indexed from the end of the list, with -1
being the last item. being the last item, -2 the second from last, etc.
4. Any date-times before the start date of the event are eliminated 4. Any date-times before the start date of the event are eliminated
(see below for why this might be needed). (see below for why this might be needed).
5. If a skip property is included and is not "omit", eliminate any 5. If a "skip" property is included and is not "omit", eliminate any
date-times that have already been produced by previous iterations date-times that have already been produced by previous iterations
of the algorithm. (This is not possible if skip is "omit".) of the algorithm. (This is not possible if skip is "omit".)
6. If further dates are required (we have not reached the until 6. If further dates are required (we have not reached the until date
date, or count limit) skip the next (interval - 1) sets of or count limit), skip the next (interval - 1) sets of candidates,
candidates, then continue from step 1. then continue from step 1.
When determining the set of occurrence dates for an event or task, When determining the set of occurrence dates for an event or task,
the following extra rules must be applied: the following extra rules must be applied:
1. The initial date-time to which the rule is applied (the "start" 1. The initial date-time to which the rule is applied (the "start"
date-time for events; the "start" or "due" date-time for tasks) date-time for events or the "start" or "due" date-time for tasks)
is always the first occurrence in the expansion (and is counted is always the first occurrence in the expansion (and is counted
if the recurrence is limited by a "count" property), even if it if the recurrence is limited by a "count" property), even if it
would normally not match the rule. would normally not match the rule.
2. The first set of candidates to consider is that which would 2. The first set of candidates to consider is that which would
contain the initial date-time. This means the first set may contain the initial date-time. This means the first set may
include candidates before the initial date-time; such candidates include candidates before the initial date-time; such candidates
are eliminated from the results in step (4) as outlined before. are eliminated from the results in step 4 of the list above.
3. The following properties MUST be implicitly added to the rule 3. The following properties MUST be implicitly added to the rule
under the given conditions: under the given conditions:
* If frequency is not "secondly" and no bySecond property: Add a * If frequency is not "secondly" and there is no "bySecond"
bySecond property with the sole value being the seconds value property, add a "bySecond" property with the sole value being
of the initial date-time. the seconds value of the initial date-time.
* If frequency is not "secondly" or "minutely", and no byMinute * If frequency is not "secondly" or "minutely" and there is no
property: Add a byMinute property with the sole value being "byMinute" property, add a "byMinute" property with the sole
the minutes value of the initial date-time. value being the minutes value of the initial date-time.
* If frequency is not "secondly", "minutely" or "hourly" and no * If frequency is not "secondly", "minutely", or "hourly" and
byHour property: Add a byHour property with the sole value there is no "byHour" property, add a "byHour" property with
being the hours value of the initial date-time. the sole value being the hours value of the initial date-time.
* If frequency is "weekly" and no byDay property: Add a byDay * If frequency is "weekly" and there is no "byDay" property, add
property with the sole value being the day-of-the-week of the a "byDay" property with the sole value being the day of the
initial date-time. week of the initial date-time.
* If frequency is "monthly" and no byDay property and no * If frequency is "monthly" and there is no "byDay" property and
byMonthDay property: Add a byMonthDay property with the sole no "byMonthDay" property, add a "byMonthDay" property with the
value being the day-of-the-month of the initial date-time. sole value being the day of the month of the initial date-
time.
* If frequency is "yearly" and no byYearDay property: * If frequency is "yearly" and there is no "byYearDay" property:
+ If there are no byMonth or byWeekNo properties, and either - If there are no "byMonth" or "byWeekNo" properties, and
there is a byMonthDay property or there is no byDay either there is a "byMonthDay" property or there is no
property: Add a byMonth property with the sole value being "byDay" property, add a "byMonth" property with the sole
the month of the initial date-time. value being the month of the initial date-time.
+ If there is no byMonthDay, byWeekNo or byDay properties: - If there are no "byMonthDay", "byWeekNo", or "byDay"
Add a byMonthDay property with the sole value being the properties, add a "byMonthDay" property with the sole value
day-of-the-month of the initial date-time. being the day of the month of the initial date-time.
+ If there is a byWeekNo property and no byMonthDay or byDay - If there is a "byWeekNo" property and no "byMonthDay" or
properties: Add a byDay property with the sole value being "byDay" properties, add a "byDay" property with the sole
the day-of-the-week of the initial date-time. value being the day of the week of the initial date-time.
4.3.3. excludedRecurrenceRules 4.3.4. excludedRecurrenceRules
Type: "RecurrenceRule[]" (optional). Type: "RecurrenceRule[]" (optional)
Defines a set of recurrence rules (repeating patterns) for date-times This defines a set of recurrence rules (repeating patterns) for date-
on which the object will not occur. The rules are interpreted the times on which the object will not occur. The rules are interpreted
same as for the "recurrenceRules" property (see Section 4.3.2), with the same as for the "recurrenceRules" property (see Section 4.3.3),
the exception that the initial date-time to which the rule is applied with the exception that the initial date-time to which the rule is
(the "start" date-time for events; the "start" or "due" date-time for applied (the "start" date-time for events or the "start" or "due"
tasks) is only considered part of the expansion if it matches the date-time for tasks) is only considered part of the expansion if it
rule. The resulting set of date-times are then removed from those matches the rule. The resulting set of date-times is then removed
generated by the recurrenceRules property, as described in from those generated by the "recurrenceRules" property, as described
Section 4.3. in Section 4.3.
4.3.4. recurrenceOverrides 4.3.5. recurrenceOverrides
Type: "LocalDateTime[PatchObject]" (optional). Type: "LocalDateTime[PatchObject]" (optional)
A map of the recurrence ids (the date-time produced by the recurrence Maps recurrence ids (the date-time produced by the recurrence rule)
rule) to an object of patches to apply to the generated occurrence to the overridden properties of the recurrence instance.
object.
If the recurrence id does not match a date-time from the recurrence If the recurrence id does not match a date-time from the recurrence
rule (or no rule is specified), it is to be treated as an additional rule (or no rule is specified), it is to be treated as an additional
occurrence (like an RDATE from iCalendar). The patch object may occurrence (like an RDATE from iCalendar). The patch object may
often be empty in this case. often be empty in this case.
If the patch object defines the "excluded" property of an occurrence If the patch object defines the "excluded" property of an occurrence
to be true, this occurrence is omitted from the final set of to be true, this occurrence is omitted from the final set of
recurrences for the calendar object (like an EXDATE from iCalendar). recurrences for the calendar object (like an EXDATE from iCalendar).
Such a patch object MUST NOT patch any other property. Such a patch object MUST NOT patch any other property.
By default, an occurrence inherits all properties from the main By default, an occurrence inherits all properties from the main
object except the start (or due) date-time, which is shifted to match object except the start (or due) date-time, which is shifted to match
the recurrence id LocalDateTime. However, individual properties of the recurrence id LocalDateTime. However, individual properties of
the occurrence can be modified by a patch, or multiple patches. It the occurrence can be modified by a patch or multiple patches. It is
is valid to patch the "start" property value, and this patch takes valid to patch the "start" property value, and this patch takes
precedence over the value generated from the recurrence id. Both the precedence over the value generated from the recurrence id. Both the
recurrence id as well as the patched "start" date-time may occur recurrence id as well as the patched "start" date-time may occur
before the original JSCalendar object's "start" or "due" date. before the original JSCalendar object's "start" or "due" date.
A pointer in the PatchObject MUST be ignored if it starts with one of A pointer in the PatchObject MUST be ignored if it starts with one of
the following prefixes: the following prefixes:
o @type * @type
o excludedRecurrenceRules * excludedRecurrenceRules
o method * method
o privacy * privacy
o prodId * prodId
o recurrenceId * recurrenceId
o recurrenceOverrides * recurrenceIdTimeZone
o recurrenceRules * recurrenceOverrides
o relatedTo * recurrenceRules
o replyTo
o uid * relatedTo
4.3.5. excluded * replyTo
Type: "Boolean" (optional, default: false). * sentBy
Defines if this object is an overridden, excluded instance of a * timeZones
recurring JSCalendar object (see Section 4.3.4). If this property
* uid
4.3.6. excluded
Type: "Boolean" (optional, default: false)
This defines if this object is an overridden, excluded instance of a
recurring JSCalendar object (see Section 4.3.5). If this property
value is true, this calendar object instance MUST be removed from the value is true, this calendar object instance MUST be removed from the
occurrence expansion. The absence of this property, or the presence occurrence expansion. The absence of this property, or the presence
of its default value false, indicates that this instance MUST be of its default value as false, indicates that this instance MUST be
included in the occurrence expansion. included in the occurrence expansion.
4.4. Sharing and Scheduling Properties 4.4. Sharing and Scheduling Properties
4.4.1. priority 4.4.1. priority
Type: "Int" (optional, default: 0). Type: "Int" (optional, default: 0)
Specifies a priority for the calendar object. This may be used as This specifies a priority for the calendar object. This may be used
part of scheduling systems to help resolve conflicts for a time as part of scheduling systems to help resolve conflicts for a time
period. period.
The priority is specified as an integer in the range 0 to 9. A value The priority is specified as an integer in the range 0 to 9. A value
of 0 specifies an undefined priority, for which the treatment will of 0 specifies an undefined priority, for which the treatment will
vary by situation. A value of 1 is the highest priority. A value of vary by situation. A value of 1 is the highest priority. A value of
2 is the second highest priority. Subsequent numbers specify a 2 is the second highest priority. Subsequent numbers specify a
decreasing ordinal priority. A value of 9 is the lowest priority. decreasing ordinal priority. A value of 9 is the lowest priority.
Other integer values are reserved for future use. Other integer values are reserved for future use.
4.4.2. freeBusyStatus 4.4.2. freeBusyStatus
Type: "String" (optional, default: "busy"). Type: "String" (optional, default: "busy")
Specifies how this calendar object should be treated when calculating This specifies how this calendar object should be treated when
free-busy state. This MUST be one of the following values, another calculating free-busy state. This MUST be one of the following
value registered in the IANA JSCalendar Enum Values registry, or a values, another value registered in the IANA "JSCalendar Enum Values"
vendor-specific value (see Section 3.3): registry, or a vendor-specific value (see Section 3.3):
o "free": The object should be ignored when calculating whether the "free": The object should be ignored when calculating whether the
user is busy. user is busy.
o "busy": The object should be included when calculating whether the "busy": The object should be included when calculating whether the
user is busy. user is busy.
4.4.3. privacy 4.4.3. privacy
Type: "String" (optional, default: "public"). Type: "String" (optional, default: "public")
Calendar objects are normally collected together and may be shared Calendar objects are normally collected together and may be shared
with other users. The privacy property allows the object owner to with other users. The privacy property allows the object owner to
indicate that it should not be shared, or should only have the time indicate that it should not be shared or should only have the time
information shared but the details withheld. Enforcement of the information shared but the details withheld. Enforcement of the
restrictions indicated by this property are up to the API via which restrictions indicated by this property is up to the API via which
this object is accessed. this object is accessed.
This property MUST NOT affect the information sent to scheduled This property MUST NOT affect the information sent to scheduled
participants; it is only interpreted by protocols that share the participants; it is only interpreted by protocols that share the
calendar objects belonging to one user with other users. calendar objects belonging to one user with other users.
The value MUST be one of the following values, another value The value MUST be one of the following values, another value
registered in the IANA JSCalendar Enum Values registry, or a vendor- registered in the IANA "JSCalendar Enum Values" registry, or a
specific value (see Section 3.3). Any value the client or server vendor-specific value (see Section 3.3). Any value the client or
doesn't understand should be preserved but treated as equivalent to server doesn't understand should be preserved but treated as
"private". equivalent to "private".
o "public": The full details of the object are visible to those whom "public": The full details of the object are visible to those whom
the object's calendar is shared with. the object's calendar is shared with.
o "private": The details of the object are hidden; only the basic "private": The details of the object are hidden; only the basic time
time and metadata is shared. The following properties MAY be and metadata are shared. The following properties MAY be shared;
shared, any other properties MUST NOT be shared: any other properties MUST NOT be shared:
* @type * @type
* created * created
* due * due
* duration * duration
* estimatedDuration * estimatedDuration
* freeBusyStatus * freeBusyStatus
* privacy * privacy
* recurrenceOverrides. Only patches which apply to another * recurrenceOverrides (Only patches that apply to another
permissible property are allowed to be shared. permissible property are allowed to be shared.)
* sequence * sequence
* showWithoutTime * showWithoutTime
* start * start
* timeZone * timeZone
* timeZones * timeZones
* uid * uid
* updated * updated
skipping to change at page 35, line 14 skipping to change at line 1647
* start * start
* timeZone * timeZone
* timeZones * timeZones
* uid * uid
* updated * updated
o "secret": The object is hidden completely (as though it did not "secret": The object is hidden completely (as though it did not
exist) when the calendar this object is in is shared. exist) when the calendar this object is in is shared.
4.4.4. replyTo 4.4.4. replyTo
Type: "String[String]" (optional). Type: "String[String]" (optional)
Represents methods by which participants may submit their response to This represents methods by which participants may submit their
the organizer of the calendar object. The keys in the property value response to the organizer of the calendar object. The keys in the
are the available methods and MUST only contain ASCII alphanumeric property value are the available methods and MUST only contain ASCII
characters (A-Za-z0-9). The value is a URI for the method specified alphanumeric characters (A-Za-z0-9). The value is a URI for the
in the key. Future methods may be defined in future specifications method specified in the key. Future methods may be defined in future
and registered with IANA; a calendar client MUST ignore any method it specifications and registered with IANA; a calendar client MUST
does not understand, but MUST preserve the method key and URI. This ignore any method it does not understand but MUST preserve the method
property MUST be omitted if no method is defined (rather than being key and URI. This property MUST be omitted if no method is defined
specified as an empty object). (rather than being specified as an empty object).
The following methods are defined: The following methods are defined:
o "imip": The organizer accepts an iMIP [RFC6047] response at this "imip": The organizer accepts an iCalendar Message-Based
email address. The value MUST be a "mailto:" URI. Interoperability Protocol (iMIP) [RFC6047] response at this email
address. The value MUST be a "mailto:" URI.
o "web": Opening this URI in a web browser will provide the user "web": Opening this URI in a web browser will provide the user with
with a page where they can submit a reply to the organizer. The a page where they can submit a reply to the organizer. The value
value MUST be a URL using the "https:" scheme. MUST be a URL using the "https:" scheme.
o "other": The organizer is identified by this URI but the method "other": The organizer is identified by this URI, but the method for
for submitting the response is undefined. submitting the response is undefined.
4.4.5. participants 4.4.5. sentBy
Type: "Id[Participant]" (optional). Type: "String" (optional)
A map of participant ids to participants, describing their This is the email address in the "From" header of the email in which
this calendar object was received. This is only relevant if the
calendar object is received via iMIP or as an attachment to a
message. If set, the value MUST be a valid "addr-spec" value as
defined in Section 3.4.1 of [RFC5322].
4.4.6. participants
Type: "Id[Participant]" (optional)
This is a map of participant ids to participants, describing their
participation in the calendar object. participation in the calendar object.
If this property is set and any participant has a sendTo property, If this property is set and any participant has a "sendTo" property,
then the "replyTo" property of this calendar object MUST define at then the "replyTo" property of this calendar object MUST define at
least one reply method. least one reply method.
A Participant object has the following properties: A Participant object has the following properties:
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be
Specifies the type of this object. This MUST be "Participant". "Participant".
o name: "String" (optional)
The display name of the participant (e.g., "Joe Bloggs").
o email: "String" (optional)
The email address for the participant.
o description: "String" (optional). name: "String" (optional)
This is the display name of the participant (e.g., "Joe Bloggs").
A plain text description of this participant. For example, this email: "String" (optional)
may include more information about their role in the event or how This is the email address to use to contact the participant or,
best to contact them. for example, match with an address book entry. If set, the value
MUST be a valid "addr-spec" value as defined in Section 3.4.1 of
[RFC5322].
o sendTo: "String[String]" (optional) description: "String" (optional)
This is a plain-text description of this participant. For
example, this may include more information about their role in the
event or how best to contact them.
Represents methods by which the participant may receive the sendTo: "String[String]" (optional)
This represents methods by which the participant may receive the
invitation and updates to the calendar object. invitation and updates to the calendar object.
The keys in the property value are the available methods and MUST The keys in the property value are the available methods and MUST
only contain ASCII alphanumeric characters (A-Za-z0-9). The value only contain ASCII alphanumeric characters (A-Za-z0-9). The value
is a URI for the method specified in the key. Future methods may is a URI for the method specified in the key. Future methods may
be defined in future specifications and registered with IANA; a be defined in future specifications and registered with IANA; a
calendar client MUST ignore any method it does not understand, but calendar client MUST ignore any method it does not understand but
MUST preserve the method key and URI. This property MUST be MUST preserve the method key and URI. This property MUST be
omitted if no method is defined (rather than being specified as an omitted if no method is defined (rather than being specified as an
empty object). empty object).
The following methods are defined: The following methods are defined:
* "imip": The participant accepts an iMIP [RFC6047] request at "imip": The participant accepts an iMIP [RFC6047] request at this
this email address. The value MUST be a "mailto:" URI. It MAY email address. The value MUST be a "mailto:" URI. It MAY be
be different from the value of the participant's "email" different from the value of the participant's "email" property.
property.
* "other": The participant is identified by this URI but the "other": The participant is identified by this URI, but the
method for submitting the invitation is undefined. method for submitting the invitation is undefined.
o kind: "String" (optional) kind: "String" (optional)
This is what kind of entity this participant is, if known.
What kind of entity this participant is, if known.
This MUST be one of the following values, another value registered This MUST be one of the following values, another value registered
in the IANA JSCalendar Enum Values registry, or a vendor-specific in the IANA "JSCalendar Enum Values" registry, or a vendor-
value (see Section 3.3). Any value the client or server doesn't specific value (see Section 3.3). Any value the client or server
understand should be treated the same as if this property is doesn't understand should be treated the same as if this property
omitted. is omitted.
* "individual": a single person
* "group": a collection of people invited as a whole "individual": a single person
* "location": a physical location that needs to be scheduled, "group": a collection of people invited as a whole
e.g., a conference room
* "resource": a non-human resource other than a location, such as "location": a physical location that needs to be scheduled, e.g.,
a projector a conference room
o roles: "String[Boolean]" (mandatory) "resource": a non-human resource other than a location, such as a
projector
A set of roles that this participant fulfills. roles: "String[Boolean]" (mandatory)
This is a set of roles that this participant fulfills.
At least one role MUST be specified for the participant. The keys At least one role MUST be specified for the participant. The keys
in the set MUST be one of the following values, another value in the set MUST be one of the following values, another value
registered in the IANA JSCalendar Enum Values registry, or a registered in the IANA "JSCalendar Enum Values" registry, or a
vendor-specific value (see Section 3.3): vendor-specific value (see Section 3.3):
* "owner": The participant is an owner of the object. This "owner": The participant is an owner of the object. This
signifies they have permission to make changes to it that signifies they have permission to make changes to it that
affect the other participants. Non-owner participants may only affect the other participants. Nonowner participants may only
change properties that just affect themselves (for example change properties that affect only themselves (for example,
setting their own alerts or changing their rsvp status). setting their own alerts or changing their RSVP status).
* "attendee": The participant is expected to be present at the "attendee": The participant is expected to be present at the
event. event.
* "optional": The participant's involvement with the event is "optional": The participant's involvement with the event is
optional. This is expected to be primarily combined with the optional. This is expected to be primarily combined with the
"attendee" role. "attendee" role.
* "informational": The participant is copied for informational "informational": The participant is copied for informational
reasons, and is not expected to attend. reasons and is not expected to attend.
* "chair": The participant is in charge of the event/task when it "chair": The participant is in charge of the event/task when it
occurs. occurs.
* "contact": The participant is someone that may be contacted for "contact": The participant is someone that may be contacted for
information about the event. information about the event.
The value for each key in the map MUST be true. It is expected The value for each key in the map MUST be true. It is expected
that no more than one of the roles "attendee" and "informational" that no more than one of the roles "attendee" and "informational"
be present; if more than one are given, "attendee" takes be present; if more than one are given, "attendee" takes
precedence over "informational". Roles that are unknown to the precedence over "informational". Roles that are unknown to the
implementation MUST be preserved. implementation MUST be preserved.
o locationId: "String" (optional) locationId: "Id" (optional)
This is the location at which this participant is expected to be
The location at which this participant is expected to be
attending. attending.
If the value does not correspond to any location id in the If the value does not correspond to any location id in the
"locations" property of the JSCalendar object, this MUST be "locations" property of the JSCalendar object, this MUST be
treated the same as if the participant's locationId were omitted. treated the same as if the participant's locationId were omitted.
o language: "String" (optional) language: "String" (optional)
This is the language tag, as defined in [BCP47], that best
The language tag as defined in [RFC5646] that best describes the describes the participant's preferred language, if known.
participant's preferred language, if known.
o participationStatus: "String" (optional, default: "needs-action")
The participation status, if any, of this participant. participationStatus: "String" (optional, default: "needs-action")
This is the participation status, if any, of this participant.
The value MUST be one of the following values, another value The value MUST be one of the following values, another value
registered in the IANA JSCalendar Enum Values registry, or a registered in the IANA "JSCalendar Enum Values" registry, or a
vendor-specific value (see Section 3.3): vendor-specific value (see Section 3.3):
* "needs-action": No status yet set by the participant. "needs-action": No status has yet been set by the participant.
* "accepted": The invited participant will participate. "accepted": The invited participant will participate.
* "declined": The invited participant will not participate. "declined": The invited participant will not participate.
* "tentative": The invited participant may participate. "tentative": The invited participant may participate.
* "delegated": The invited participant has delegated their "delegated": The invited participant has delegated their
attendance to another participant, as specified in the attendance to another participant, as specified in the
delegatedTo property. "delegatedTo" property.
o participationComment: "String" (optional)
A note from the participant to explain their participation status. participationComment: "String" (optional)
This is a note from the participant to explain their participation
status.
o expectReply: "Boolean" (optional, default: false) expectReply: "Boolean" (optional, default: false)
If true, the organizer is expecting the participant to notify them If true, the organizer is expecting the participant to notify them
of their participation status. of their participation status.
o scheduleAgent: "String" (optional, default: "server") scheduleAgent: "String" (optional, default: "server")
This is who is responsible for sending scheduling messages with
Who is responsible for sending scheduling messages with this this calendar object to the participant.
calendar object to the participant.
The value MUST be one of the following values, another value The value MUST be one of the following values, another value
registered in the IANA JSCalendar Enum Values registry, or a registered in the IANA "JSCalendar Enum Values" registry, or a
vendor-specific value (see Section 3.3): vendor-specific value (see Section 3.3):
* "server": The calendar server will send the scheduling "server": The calendar server will send the scheduling messages.
messages.
* "client": The calendar client will send the scheduling "client": The calendar client will send the scheduling messages.
messages.
* "none": No scheduling messages are to be sent to this "none": No scheduling messages are to be sent to this
participant. participant.
o scheduleForceSend: "Boolean" (optional, default: false) scheduleForceSend: "Boolean" (optional, default: false)
A client may set the property on a participant to true to request A client may set the property on a participant to true to request
that the server send a scheduling message to the participant when that the server send a scheduling message to the participant when
it would not normally do so (e.g. if no significant change is made it would not normally do so (e.g., if no significant change is
the object or the scheduleAgent is set to client). The property made the object or the scheduleAgent is set to client). The
MUST NOT be stored in the JSCalendar object on the server or property MUST NOT be stored in the JSCalendar object on the server
appear in a scheduling message. or appear in a scheduling message.
o scheduleSequence: "UnsignedInt" (optional, default: 0)
The sequence number of the last response from the participant. If scheduleSequence: "UnsignedInt" (optional, default: 0)
defined, this MUST be a non-negative integer. This is the sequence number of the last response from the
participant. If defined, this MUST be a nonnegative integer.
This can be used to determine whether the participant has sent a This can be used to determine whether the participant has sent a
new response following significant changes to the calendar object, new response following significant changes to the calendar object
and to determine if future responses are responding to a current and to determine if future responses are responding to a current
or older view of the data. or older view of the data.
o scheduleStatus: "String[]" (optional) scheduleStatus: "String[]" (optional)
This is a list of status codes, returned from the processing of
A list of status codes, as defined in Section 3.8.8.3 of the most recent scheduling message sent to this participant. The
[RFC5545], returned from the processing of the most recent status codes MUST be valid "statcode" values as defined in the
scheduling message sent to this participant. ABNF in Section 3.8.8.3 of [RFC5545].
Servers MUST only add or change this property when they send a Servers MUST only add or change this property when they send a
scheduling message to the participant. Clients SHOULD NOT change scheduling message to the participant. Clients SHOULD NOT change
or remove this property if it was provided by the server. Clients or remove this property if it was provided by the server. Clients
MAY add, change, or remove the property for participants where the MAY add, change, or remove the property for participants where the
client is handling the scheduling. client is handling the scheduling.
This property MUST NOT be included in scheduling messages. This property MUST NOT be included in scheduling messages.
o scheduleUpdated: "UTCDateTime" (optional) scheduleUpdated: "UTCDateTime" (optional)
This is the timestamp for the most recent response from this
The timestamp for the most recent response from this participant. participant.
This is the "updated" property of the last response when using This is the "updated" property of the last response when using
iTIP. It can be compared to the "updated" property in future iTIP. It can be compared to the "updated" property in future
responses to detect and discard older responses delivered out of responses to detect and discard older responses delivered out of
order. order.
o invitedBy: "String" (optional) sentBy: "String" (optional)
This is the email address in the "From" header of the email that
The participant id of the participant who invited this one, if last updated this participant via iMIP. This SHOULD only be set
known. if the email address is different to that in the mailto URI of
this participant's "imip" method in the "sendTo" property (i.e.,
the response was received from a different address to that which
the invitation was sent to). If set, the value MUST be a valid
"addr-spec" value as defined in Section 3.4.1 of [RFC5322].
o delegatedTo: "String[Boolean]" (optional) invitedBy: "Id" (optional)
This is the id of the participant who added this participant to
the event/task, if known.
A set of participant ids that this participant has delegated their delegatedTo: "Id[Boolean]" (optional)
participation to. Each key in the set MUST be the id of a This is set of participant ids that this participant has delegated
their participation to. Each key in the set MUST be the id of a
participant. The value for each key in the map MUST be true. If participant. The value for each key in the map MUST be true. If
there are no delegates, this MUST be omitted (rather than there are no delegates, this MUST be omitted (rather than
specified as an empty set). specified as an empty set).
o delegatedFrom: "String[Boolean]" (optional) delegatedFrom: "Id[Boolean]" (optional)
This is a set of participant ids that this participant is acting
A set of participant ids that this participant is acting as a as a delegate for. Each key in the set MUST be the id of a
delegate for. Each key in the set MUST be the id of a
participant. The value for each key in the map MUST be true. If participant. The value for each key in the map MUST be true. If
there are no delegators, this MUST be omitted (rather than there are no delegators, this MUST be omitted (rather than
specified as an empty set). specified as an empty set).
o memberOf: "String[Boolean]" (optional) memberOf: "Id[Boolean]" (optional)
This is a set of group participants that were invited to this
calendar object, which caused this participant to be invited due
to their membership in the group(s). Each key in the set MUST be
the id of a participant. The value for each key in the map MUST
be true. If there are no groups, this MUST be omitted (rather
than specified as an empty set).
A set of group participants that were invited to this calendar links: "Id[Link]" (optional)
object, which caused this participant to be invited due to their This is a map of link ids to Link objects, representing external
membership in the group(s). Each key in the set MUST be the id of resources associated with this participant, for example, a vCard
a participant. The value for each key in the map MUST be true. or image. If there are no links, this MUST be omitted (rather
If there are no groups, this MUST be omitted (rather than than specified as an empty set).
specified as an empty set).
o links: "Id[Link]" (optional) progress: "String" (optional; only allowed for participants of a
A map of link ids to Link objects, representing external resources Task)
associated with this participant, for example a vCard or image. This represents the progress of the participant for this task. It
If there are no links, this MUST be omitted (rather than specified MUST NOT be set if the "participationStatus" of this participant
as an empty set). is any value other than "accepted". See Section 5.2.5 for allowed
values and semantics.
o progress: "String" (optional; only allowed for participants of a progressUpdated: "UTCDateTime" (optional; only allowed for
JSTask). Represents the progress of the participant for this participants of a Task)
task. It MUST NOT be set if the "participationStatus" of this This specifies the date-time the "progress" property was last set
participant is any value other than "accepted". See Section 5.2.5 on this participant. See Section 5.2.6 for allowed values and
for allowed values and semantics. semantics.
o progressUpdated: "UTCDateTime" (optional; only allowed for percentComplete: "UnsignedInt" (optional; only allowed for
participants of a JSTask). Specifies the date-time the progress participants of a Task)
property was last set on this participant. See Section 5.2.6 for This represents the percent completion of the participant for this
allowed values and semantics. task. The property value MUST be a positive integer between 0 and
100.
o percentComplete: "UnsignedInt" (optional; only allowed for 4.4.7. requestStatus
participants of a JSTask). Represents the percent completion of
the participant for this task. The property value MUST be a Type: "String" (optional)
positive integer between 0 and 100.
A request status as returned from processing the most recent
scheduling request for this JSCalendar object. The allowed values
are defined by the ABNF definitions of "statcode", "statdesc" and
"extdata" in Section 3.8.8.3 of [RFC5545] and the following ABNF
[RFC5234]:
reqstatus = statcode ";" statdesc [";" extdata]
Servers MUST only add or change this property when they performe a
scheduling action. Clients SHOULD NOT change or remove this property
if it was provided by the server. Clients MAY add, change, or remove
the property when the client is handling the scheduling.
This property MUST only be included in scheduling messages according
to the rules defined for the REQUEST-STATUS iCalendar property in
[RFC5546].
4.5. Alerts Properties 4.5. Alerts Properties
4.5.1. useDefaultAlerts 4.5.1. useDefaultAlerts
Type: "Boolean" (optional, default: false). Type: "Boolean" (optional, default: false)
If true, use the user's default alerts and ignore the value of the If true, use the user's default alerts and ignore the value of the
"alerts" property. Fetching user defaults is dependent on the API "alerts" property. Fetching user defaults is dependent on the API
from which this JSCalendar object is being fetched, and is not from which this JSCalendar object is being fetched and is not defined
defined in this specification. If an implementation cannot determine in this specification. If an implementation cannot determine the
the user's default alerts, or none are set, it MUST process the user's default alerts, or none are set, it MUST process the "alerts"
alerts property as if "useDefaultAlerts" is set to false. property as if "useDefaultAlerts" is set to false.
4.5.2. alerts 4.5.2. alerts
Type: "Id[Alert]" (optional). Type: "Id[Alert]" (optional)
A map of alert ids to Alert objects, representing alerts/reminders to
display or send to the user for this calendar object.
An Alert Object has the following properties:
o @type: "String" (mandatory) This is a map of alert ids to Alert objects, representing alerts/
reminders to display or send to the user for this calendar object.
Specifies the type of this object. This MUST be "Alert". An Alert object has the following properties:
o trigger: "OffsetTrigger|AbsoluteTrigger|UnknownTrigger" @type: "String" (mandatory)
(mandatory) This specifies the type of this object. This MUST be "Alert".
Defines when to trigger the alert. New types may be defined in trigger: "OffsetTrigger|AbsoluteTrigger|UnknownTrigger"
future documents. (mandatory)
This defines when to trigger the alert. New types may be defined
in future documents.
An "OffsetTrigger" object has the following properties: An "OffsetTrigger" object has the following properties:
* @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be
Specifies the type of this object. This MUST be
"OffsetTrigger". "OffsetTrigger".
* offset: "SignedDuration" (mandatory). offset: "SignedDuration" (mandatory)
This defines the offset at which to trigger the alert relative
Defines the offset at which to trigger the alert relative to to the time property defined in the "relativeTo" property of
the time property defined in the "relativeTo" property of the the alert. Negative durations signify alerts before the time
alert. Negative durations signify alerts before the time property; positive durations signify alerts after the time
property, positive durations signify alerts after. property.
* relativeTo: "String" (optional, default: "start")
Specifies the time property that the alert offset is relative relativeTo: "String" (optional, default: "start")
to. The value MUST be one of: This specifies the time property that the alert offset is
relative to. The value MUST be one of the following:
+ "start": triggers the alert relative to the start of the "start": triggers the alert relative to the start of the
calendar object calendar object
+ "end": triggers the alert relative to the end/due time of "end": triggers the alert relative to the end/due time of the
the calendar object calendar object
An "AbsoluteTrigger" object has the following properties: An "AbsoluteTrigger" object has the following properties:
* @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be
Specifies the type of this object. This MUST be
"AbsoluteTrigger". "AbsoluteTrigger".
* when: "UTCDateTime" (mandatory). when: "UTCDateTime" (mandatory)
This defines a specific UTC date-time when the alert is
Defines a specific UTC date-time when the alert is triggered. triggered.
An "UnknownTrigger" object is an object that contains a "@type" An "UnknownTrigger" object is an object that contains an "@type"
property whose value is not recognized (i.e., not "OffsetTrigger" property whose value is not recognized (i.e., not "OffsetTrigger"
or "AbsoluteTrigger"), plus zero or more other properties. This or "AbsoluteTrigger") plus zero or more other properties. This is
is for compatibility with client extensions and future for compatibility with client extensions and future
specifications. Implementations SHOULD NOT trigger for trigger specifications. Implementations SHOULD NOT trigger for trigger
types they do not understand, but MUST preserve them. types they do not understand but MUST preserve them.
o acknowledged: "UTCDateTime" (optional)
acknowledged: "UTCDateTime" (optional)
This records when an alert was last acknowledged. This is set This records when an alert was last acknowledged. This is set
when the user has dismissed the alert; other clients that sync when the user has dismissed the alert; other clients that sync
this property SHOULD automatically dismiss or suppress duplicate this property SHOULD automatically dismiss or suppress duplicate
alerts (alerts with the same alert id that triggered on or before alerts (alerts with the same alert id that triggered on or before
this date-time). this date-time).
For a recurring calendar object, setting the "acknowledged" For a recurring calendar object, setting the "acknowledged"
property MUST NOT add a new override to the "recurrenceOverrides" property MUST NOT add a new override to the "recurrenceOverrides"
property. If the alert is not already overridden, the property. If the alert is not already overridden, the
acknowledged property MUST be set on the alert in the master "acknowledged" property MUST be set on the alert in the base
event/task. event/task.
Certain kinds of alert action may not provide feedback as to when Certain kinds of alert action may not provide feedback as to when
the user sees them, for example email based alerts. For those the user sees them, for example, email-based alerts. For those
kinds of alerts, this property MUST be set immediately when the kinds of alerts, this property MUST be set immediately when the
alert is triggered and the action successfully carried out. alert is triggered and the action is successfully carried out.
o relatedTo: "String[Relation]" (optional)
Relates this alert to other alerts in the same JSCalendar object.
If the user wishes to snooze an alert, the application MUST create
an alert to trigger after snoozing. This new snooze alert MUST
set a parent relation to the identifier of the original alert.
o action: "String" (optional, default: "display") relatedTo: "String[Relation]" (optional)
This relates this alert to other alerts in the same JSCalendar
object. If the user wishes to snooze an alert, the application
MUST create an alert to trigger after snoozing. This new snooze
alert MUST set a parent relation to the identifier of the original
alert.
Describes how to alert the user. action: "String" (optional, default: "display")
This describes how to alert the user.
The value MUST be at most one of the following values, a value The value MUST be at most one of the following values, a value
registered in the IANA JSCalendar Enum Values registry, or a registered in the IANA "JSCalendar Enum Values" registry, or a
vendor-specific value (see Section 3.3): vendor-specific value (see Section 3.3):
* "display": The alert should be displayed as appropriate for the "display": The alert should be displayed as appropriate for the
current device and user context. current device and user context.
* "email": The alert should trigger an email sent out to the "email": The alert should trigger an email sent out to the user,
user, notifying about the alert. This action is typically only notifying them of the alert. This action is typically only
appropriate for server implementations. appropriate for server implementations.
4.6. Multilingual Properties 4.6. Multilingual Properties
4.6.1. localizations 4.6.1. localizations
Type: "String[PatchObject]" (optional). Type: "String[PatchObject]" (optional)
A map of language tags [RFC5646] to patch objects, which localize the A map where each key is a language tag [BCP47], and the corresponding
calendar object into the locale of the respective language tag. value is a set of patches to apply to the calendar object in order to
localize it into that locale.
See the description of PatchObject (Section 1.4.9) for the structure See the description of PatchObject (Section 1.4.9) for the structure
of the PatchObject. The patches are applied to the top-level of the PatchObject. The patches are applied to the top-level
calendar object. In addition, the "locale" property of the patched calendar object. In addition, the "locale" property of the patched
object is set to the language tag. All pointers for patches MUST end object is set to the language tag. All pointers for patches MUST end
with one of the following suffixes; any patch that does not follow with one of the following suffixes; any patch that does not follow
this MUST be ignored unless otherwise specified in a future RFC: this MUST be ignored unless otherwise specified in a future RFC:
o title * title
o description * description
o name * name
A patch MUST NOT have the prefix "recurrenceOverrides"; any A patch MUST NOT have the prefix "recurrenceOverrides"; any
localization of the override MUST be a patch to the localizations localization of the override MUST be a patch to the "localizations"
property inside the override instead. For example, a patch to property inside the override instead. For example, a patch to
"locations/abcd1234/title" is permissible, but a patch to "uid" or "locations/abcd1234/title" is permissible, but a patch to "uid" or
"recurrenceOverrides/2020-01-05T14:00:00/title" is not. "recurrenceOverrides/2020-01-05T14:00:00/title" is not.
Note that this specification does not define how to maintain validity Note that this specification does not define how to maintain validity
of localized content. For example, a client application changing a of localized content. For example, a client application changing a
JSCalendar object's title property might also need to update any JSCalendar object's "title" property might also need to update any
localizations of this property. Client implementations SHOULD localizations of this property. Client implementations SHOULD
provide the means to manage localizations, but how to achieve this is provide the means to manage localizations, but how to achieve this is
specific to the application's workflow and requirements. specific to the application's workflow and requirements.
4.7. Time Zone Properties 4.7. Time Zone Properties
4.7.1. timeZone 4.7.1. timeZone
Type: "TimeZoneId|null" (optional, default: null). Type: "TimeZoneId|null" (optional, default: null)
Identifies the time zone the object is scheduled in, or null for This identifies the time zone the object is scheduled in or is null
floating time. This is either a name from the IANA Time Zone for floating time. This is either a name from the IANA Time Zone
Database [TZDB] or the TimeZoneId of a custom time zone from the Database [TZDB] or the TimeZoneId of a custom time zone from the
"timeZones" property (Section 4.7.2). If omitted, this MUST be "timeZones" property (Section 4.7.2). If omitted, this MUST be
presumed to be null (i.e., floating time). presumed to be null (i.e., floating time).
4.7.2. timeZones 4.7.2. timeZones
Type: "TimeZoneId[TimeZone]" (optional). Type: "TimeZoneId[TimeZone]" (optional)
Maps identifiers of custom time zones to their time zone definitions. This maps identifiers of custom time zones to their time zone
The following restrictions apply for each key in the map: definitions. The following restrictions apply for each key in the
map:
o To avoid conflict with names in the IANA Time Zone Database * To avoid conflict with names in the IANA Time Zone Database
[TZDB], it MUST start with the "/" character. [TZDB], it MUST start with the "/" character.
o It MUST be a valid "paramtext" value as specified in Section 3.1. * It MUST be a valid "paramtext" value, as specified in Section 3.1
of [RFC5545]. of [RFC5545].
o At least one other property in the same JSCalendar object MUST * At least one other property in the same JSCalendar object MUST
reference a time zone using this identifier (i.e., orphaned time reference a time zone using this identifier (i.e., orphaned time
zones are not allowed). zones are not allowed).
An identifier need only be unique to this JSCalendar object. A An identifier need only be unique to this JSCalendar object. It MAY
JSCalendar object may be part in a hierarchy of other JSCalendar differ from the "tzId" property value of the TimeZone object it maps
objects (say, a JSEvent is an entry in a JSGroup). In this case, the to.
A JSCalendar object may be part of a hierarchy of other JSCalendar
objects (say, an Event is an entry in a Group). In this case, the
set of time zones is the sum of the time zone definitions of this set of time zones is the sum of the time zone definitions of this
object and its parent objects. If multiple time zones with the same object and its parent objects. If multiple time zones with the same
identifier exist, then the definition closest to the calendar object identifier exist, then the definition closest to the calendar object
in relation to its parents MUST be used. (In context of JSEvent, a in relation to its parents MUST be used. (In context of Event, a
time zone definition in its timeZones property has precedence over a time zone definition in its "timeZones" property has precedence over
definition of the same id in the JSGroup). Time zone definitions in a definition of the same id in the Group). Time zone definitions in
any children of the calendar object MUST be ignored. any children of the calendar object MUST be ignored.
A TimeZone object maps a VTIMEZONE component from iCalendar [RFC5545] A TimeZone object maps a VTIMEZONE component from iCalendar, and the
and the semantics are as defined there. A valid time zone MUST semantics are as defined in [RFC5545]. A valid time zone MUST define
define at least one transition rule in the "standard" or "daylight" at least one transition rule in the "standard" or "daylight"
property. Its properties are: property. Its properties are:
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be "TimeZone".
Specifies the type of this object. This MUST be "TimeZone".
o tzId: "String" (mandatory).
The TZID property from iCalendar.
o updated: "UTCDateTime" (optional)
The LAST-MODIFIED property from iCalendar.
o url: "String" (optional)
The TZURL property from iCalendar.
o validUntil: "UTCDateTime" (optional) tzId: "String" (mandatory)
This is the TZID property from iCalendar. Note that this implies
that the value MUST be a valid "paramtext" value as specified in
Section 3.1. of [RFC5545].
The TZUNTIL property from iCalendar specified in [RFC7808]. updated: "UTCDateTime" (optional)
This is the LAST-MODIFIED property from iCalendar.
o aliases: "String[Boolean]" (optional) url: "String" (optional)
Maps the TZID-ALIAS-OF properties from iCalendar specified in This is the TZURL property from iCalendar.
[RFC7808] to a JSON set of aliases. The set is represented as an
object, with the keys being the aliases. The value for each key
in the map MUST be true.
o standard: "TimeZoneRule[]" (optional) validUntil: "UTCDateTime" (optional)
This is the TZUNTIL property from iCalendar, specified in
[RFC7808].
The STANDARD sub-components from iCalendar. The order MUST be aliases: "String[Boolean]" (optional)
preserved during conversion. This maps the TZID-ALIAS-OF properties from iCalendar, specified
in [RFC7808], to a JSON set of aliases. The set is represented as
an object, with the keys being the aliases. The value for each
key in the map MUST be true.
o daylight: "TimeZoneRule[]" (optional). standard: "TimeZoneRule[]" (optional)
This the STANDARD sub-components from iCalendar. The order MUST
be preserved during conversion.
The DAYLIGHT sub-components from iCalendar. The order MUST be daylight: "TimeZoneRule[]" (optional)
preserved during conversion. This the DAYLIGHT sub-components from iCalendar. The order MUST
be preserved during conversion.
A TimeZoneRule object maps a STANDARD or DAYLIGHT sub-component from A TimeZoneRule object maps a STANDARD or DAYLIGHT sub-component from
iCalendar, with the restriction that at most one recurrence rule is iCalendar, with the restriction that, at most, one recurrence rule is
allowed per rule. It has the following properties: allowed per rule. It has the following properties:
o @type: "String" (mandatory) @type: "String" (mandatory)
This specifies the type of this object. This MUST be
Specifies the type of this object. This MUST be "TimeZoneRule". "TimeZoneRule".
o start: "LocalDateTime" (mandatory)
The DTSTART property from iCalendar.
o offsetFrom: "String" (mandatory)
The TZOFFSETFROM property from iCalendar.
o offsetTo: "String" (mandatory)
The TZOFFSETTO property from iCalendar. start: "LocalDateTime" (mandatory)
This is the DTSTART property from iCalendar.
o recurrenceRules: "RecurrenceRule[]" (optional) offsetFrom: "String" (mandatory)
This is the TZOFFSETFROM property from iCalendar.
The RRULE property mapped as specified in Section 4.3.2. During offsetTo: "String" (mandatory)
recurrence rule evaluation, the "until" property value MUST be This is the TZOFFSETTO property from iCalendar.
interpreted as a local time in the UTC time zone.
o recurrenceOverrides: "LocalDateTime[PatchObject]" (optional) recurrenceRules: "RecurrenceRule[]" (optional)
This is the RRULE property mapped, as specified in Section 4.3.3.
During recurrence rule evaluation, the "until" property value MUST
be interpreted as a local time in the UTC time zone.
Maps the RDATE properties from iCalendar. The set is represented recurrenceOverrides: "LocalDateTime[PatchObject]" (optional)
as an object, with the keys being the recurrence dates. The patch This maps the RDATE properties from iCalendar. The set is
object MUST be the empty JSON object ({}). represented as an object, with the keys being the recurrence
dates. The patch object MUST be the empty JSON object ({}).
o names: "String[Boolean]" (optional) names: "String[Boolean]" optional)
Maps the TZNAME properties from iCalendar to a JSON set. The set This maps the TZNAME properties from iCalendar to a JSON set. The
is represented as an object, with the keys being the names, set is represented as an object, with the keys being the names,
excluding any "tznparam" component from iCalendar. The value for excluding any "tznparam" component from iCalendar. The value for
each key in the map MUST be true. each key in the map MUST be true.
o comments: "String[]" (optional). Maps the COMMENT properties from comments: "String[]" (optional)
iCalendar. The order MUST be preserved during conversion. This maps the COMMENT properties from iCalendar. The order MUST
be preserved during conversion.
5. Type-specific JSCalendar Properties 5. Type-Specific JSCalendar Properties
5.1. JSEvent Properties 5.1. Event Properties
In addition to the common JSCalendar object properties (Section 4) a In addition to the common JSCalendar object properties (Section 4),
JSEvent has the following properties: an Event has the following properties:
5.1.1. start 5.1.1. start
Type: "LocalDateTime" (mandatory). Type: "LocalDateTime" (mandatory)
The date/time the event starts in the event's time zone (as specified This is the date/time the event starts in the event's time zone (as
in the "timeZone" property, see Section 4.7.1). specified in the "timeZone" property, see Section 4.7.1).
5.1.2. duration 5.1.2. duration
Type: "Duration" (optional, default: "PT0S"). Type: "Duration" (optional, default: "PT0S")
The zero or positive duration of the event in the event's start time This is the zero or positive duration of the event in the event's
zone. The end time of an event can be found by adding the duration start time zone. The end time of an event can be found by adding the
to the event's start time. duration to the event's start time.
A JSEvent MAY involve start and end locations that are in different An Event MAY involve start and end locations that are in different
time zones (e.g., a trans-continental flight). This can be expressed time zones (e.g., a transcontinental flight). This can be expressed
using the "relativeTo" and "timeZone" properties of the JSEvent's using the "relativeTo" and "timeZone" properties of the Event's
Location objects (see Section 4.2.5). Location objects (see Section 4.2.5).
5.1.3. status 5.1.3. status
Type: "String" (optional, default: "confirmed"). Type: "String" (optional, default: "confirmed")
The scheduling status (Section 4.4) of a JSEvent. If set, it MUST be This is the scheduling status (Section 4.4) of an Event. If set, it
one of the following values, another value registered in the IANA MUST be one of the following values, another value registered in the
JSCalendar Enum Values registry, or a vendor-specific value (see IANA "JSCalendar Enum Values" registry, or a vendor-specific value
Section 3.3): (see Section 3.3):
o "confirmed": Indicates the event is definitely happening. "confirmed": indicates the event is definitely happening
o "cancelled": Indicates the event has been cancelled. "cancelled": indicates the event has been cancelled
o "tentative": Indicates the event may happen. "tentative": indicates the event may happen
5.2. JSTask Properties 5.2. Task Properties
In addition to the common JSCalendar object properties (Section 4) a In addition to the common JSCalendar object properties (Section 4), a
JSTask has the following properties: Task has the following properties:
5.2.1. due 5.2.1. due
Type: "LocalDateTime" (optional). Type: "LocalDateTime" (optional)
The date/time the task is due in the task's time zone. This is the date/time the task is due in the task's time zone.
5.2.2. start 5.2.2. start
Type: "LocalDateTime" (optional). Type: "LocalDateTime" (optional)
The date/time the task should start in the task's time zone. This the date/time the task should start in the task's time zone.
5.2.3. estimatedDuration 5.2.3. estimatedDuration
Type: "Duration" (optional). Type: "Duration" (optional)
Specifies the estimated positive duration of time the task takes to This specifies the estimated positive duration of time the task takes
complete. to complete.
5.2.4. percentComplete 5.2.4. percentComplete
Type: "UnsignedInt" (optional). Type: "UnsignedInt" (optional)
Represents the percent completion of the task overall. The property This represents the percent completion of the task overall. The
value MUST be a positive integer between 0 and 100. property value MUST be a positive integer between 0 and 100.
5.2.5. progress 5.2.5. progress
Type: "String" (optional). Type: "String" (optional)
Defines the progress of this task. If omitted, the default progress This defines the progress of this task. If omitted, the default
(Section 4.4) of a JSTask is defined as follows (in order of progress (Section 4.4) of a Task is defined as follows (in order of
evaluation): evaluation):
o "completed": if the "progress" property value of all participants "completed": if the "progress" property value of all participants is
is "completed". "completed"
o "failed": if at least one "progress" property value of a "failed": if at least one "progress" property value of a participant
participant is "failed". is "failed"
o "in-process": if at least one "progress" property value of a "in-process": if at least one "progress" property value of a
participant is "in-process". participant is "in-process"
o "needs-action": If none of the other criteria match. "needs-action": if none of the other criteria match
If set, it MUST be one of the following values, another value If set, it MUST be one of the following values, another value
registered in the IANA JSCalendar Enum Values registry, or a vendor- registered in the IANA "JSCalendar Enum Values" registry, or a
specific value (see Section 3.3): vendor-specific value (see Section 3.3):
o "needs-action": Indicates the task needs action. "needs-action": indicates the task needs action
o "in-process": Indicates the task is in process. "in-process": indicates the task is in process
o "completed": Indicates the task is completed. "completed": indicates the task is completed
o "failed": Indicates the task failed. "failed": indicates the task failed
o "cancelled": Indicates the task was cancelled. "cancelled": indicates the task was cancelled
5.2.6. progressUpdated 5.2.6. progressUpdated
Type: "UTCDateTime" (optional). Type: "UTCDateTime" (optional)
Specifies the date/time the "progress" property of either the task This specifies the date/time the "progress" property of either the
overall (Section 5.2.5) or a specific participant (Section 4.4.5) was task overall (Section 5.2.5) or a specific participant
last updated. (Section 4.4.6) was last updated.
If the task is recurring and has future instances, a client may want If the task is recurring and has future instances, a client may want
to keep track of the last progress update timestamp of a specific to keep track of the last progress update timestamp of a specific
task recurrence, but leave other instances unchanged. One way to task recurrence but leave other instances unchanged. One way to
achieve this is by overriding the progressUpdated property in the achieve this is by overriding the "progressUpdated" property in the
task "recurrenceOverrides" property. However, this could produce a task "recurrenceOverrides" property. However, this could produce a
long list of timestamps for regularly recurring tasks. An long list of timestamps for regularly recurring tasks. An
alternative approach is to split the JSTask into a current, single alternative approach is to split the Task into a current, single
instance of JSTask with this instance progress update time and a instance of Task with this instance progress update time and a future
future recurring instance. See also Section 4.1.3 on splitting. recurring instance. See also Section 4.1.3 on splitting.
5.3. JSGroup Properties 5.3. Group Properties
JSGroup supports the following common JSCalendar properties Group supports the following common JSCalendar properties
(Section 4): (Section 4):
o @type * @type
o uid * uid
o prodId * prodId
o created
o updated * created
o title * updated
o description * title
o descriptionContentType * description
o links * descriptionContentType
o locale * links
o keywords * locale
o categories * keywords
o color * categories
o timeZones * color
In addition, the following JSGroup-specific properties are supported: * timeZones
In addition, the following Group-specific properties are supported:
5.3.1. entries 5.3.1. entries
Type: "(JSTask|JSEvent)[]" (mandatory). Type: "(Task|Event)[]" (mandatory)
A collection of group members. Implementations MUST ignore entries This is a collection of group members. Implementations MUST ignore
of unknown type. entries of unknown type.
5.3.2. source 5.3.2. source
Type: "String" (optional). Type: "String" (optional)
The source from which updated versions of this group may be retrieved This is the source from which updated versions of this group may be
from. The value MUST be a URI. retrieved. The value MUST be a URI.
6. Examples 6. Examples
The following examples illustrate several aspects of the JSCalendar The following examples illustrate several aspects of the JSCalendar
data model and format. The examples may omit mandatory or additional data model and format. The examples may omit mandatory or additional
properties, which is indicated by a placeholder property with key properties, which is indicated by a placeholder property with key
"...". While most of the examples use calendar event objects, they "...". While most of the examples use calendar event objects, they
are also illustrative for tasks. are also illustrative for tasks.
6.1. Simple event 6.1. Simple Event
This example illustrates a simple one-time event. It specifies a This example illustrates a simple one-time event. It specifies a
one-time event that begins on January 15, 2020 at 1pm New York local one-time event that begins on January 15, 2020 at 1 pm New York local
time and ends after 1 hour. time and ends after 1 hour.
{ {
"@type": "jsevent", "@type": "Event",
"uid": "a8df6573-0474-496d-8496-033ad45d7fea", "uid": "a8df6573-0474-496d-8496-033ad45d7fea",
"updated": "2020-01-02T18:23:04Z", "updated": "2020-01-02T18:23:04Z",
"title": "Some event", "title": "Some event",
"start": "2020-01-15T13:00:00", "start": "2020-01-15T13:00:00",
"timeZone": "America/New_York", "timeZone": "America/New_York",
"duration": "PT1H" "duration": "PT1H"
} }
6.2. Simple task 6.2. Simple Task
This example illustrates a simple task for a plain to-do item. This example illustrates a simple task for a plain to-do item.
{ {
"@type": "jstask", "@type": "Task",
"uid": "2a358cee-6489-4f14-a57f-c104db4dc2f2", "uid": "2a358cee-6489-4f14-a57f-c104db4dc2f2",
"updated": "2020-01-09T14:32:01Z", "updated": "2020-01-09T14:32:01Z",
"title": "Do something" "title": "Do something"
} }
6.3. Simple group 6.3. Simple Group
This example illustrates a simple calendar object group that contains This example illustrates a simple calendar object group that contains
an event and a task. an event and a task.
{ {
"@type": "jsgroup", "@type": "Group",
"uid": "bf0ac22b-4989-4caf-9ebd-54301b4ee51a", "uid": "bf0ac22b-4989-4caf-9ebd-54301b4ee51a",
"updated": "2020-01-15T18:00:00Z", "updated": "2020-01-15T18:00:00Z",
"name": "A simple group", "name": "A simple group",
"entries": [{ "entries": [{
"@type": "jsevent", "@type": "Event",
"uid": "a8df6573-0474-496d-8496-033ad45d7fea", "uid": "a8df6573-0474-496d-8496-033ad45d7fea",
"updated": "2020-01-02T18:23:04Z", "updated": "2020-01-02T18:23:04Z",
"title": "Some event", "title": "Some event",
"start": "2020-01-15T13:00:00", "start": "2020-01-15T13:00:00",
"timeZone": "America/New_York", "timeZone": "America/New_York",
"duration": "PT1H" "duration": "PT1H"
}, },
{ {
"@type": "jstask", "@type": "Task",
"uid": "2a358cee-6489-4f14-a57f-c104db4dc2f2", "uid": "2a358cee-6489-4f14-a57f-c104db4dc2f2",
"updated": "2020-01-09T14:32:01Z", "updated": "2020-01-09T14:32:01Z",
"title": "Do something" "title": "Do something"
}] }]
} }
6.4. All-day event 6.4. All-Day Event
This example illustrates an event for an international holiday. It This example illustrates an event for an international holiday. It
specifies an all-day event on April 1 that occurs every year since specifies an all-day event on April 1 that occurs every year since
the year 1900. the year 1900.
{ {
"...": "", "...": "",
"title": "April Fool's Day", "title": "April Fool's Day",
"showWithoutTime": true, "showWithoutTime": true,
"start": "1900-04-01T00:00:00", "start": "1900-04-01T00:00:00",
"duration": "P1D", "duration": "P1D",
"recurrenceRules": [{ "recurrenceRules": [{
"@type": "RecurrenceRule", "@type": "RecurrenceRule",
"frequency": "yearly" "frequency": "yearly"
}] }]
} }
6.5. Task with a due date 6.5. Task with a Due Date
This example illustrates a task with a due date. It is a reminder to This example illustrates a task with a due date. It is a reminder to
buy groceries before 6pm Vienna local time on January 19, 2020. The buy groceries before 6 pm Vienna local time on January 19, 2020. The
calendar user expects to need 1 hour for shopping. calendar user expects to need 1 hour for shopping.
{ {
"...": "", "...": "",
"title": "Buy groceries", "title": "Buy groceries",
"due": "2020-01-19T18:00:00", "due": "2020-01-19T18:00:00",
"timeZone": "Europe/Vienna", "timeZone": "Europe/Vienna",
"estimatedDuration": "PT1H" "estimatedDuration": "PT1H"
} }
6.6. Event with end time zone 6.6. Event with End Time Zone
This example illustrates the use of end time zones by use of an This example illustrates the use of end time zones by use of an
international flight. The flight starts on April 1, 2020 at 9am in international flight. The flight starts on April 1, 2020 at 9 am in
Berlin local time. The duration of the flight is scheduled at 10 Berlin local time. The duration of the flight is scheduled at 10
hours 30 minutes. The time at the flight's destination is in the hours 30 minutes. The time at the flight's destination is in the
same time zone as Tokyo. Calendar clients could use the end time same time zone as Tokyo. Calendar clients could use the end time
zone to display the arrival time in Tokyo local time and highlight zone to display the arrival time in Tokyo local time and highlight
the time zone difference of the flight. The location names can serve the time zone difference of the flight. The location names can serve
as input for navigation systems. as input for navigation systems.
{ {
"...": "", "...": "",
"title": "Flight XY51 to Tokyo", "title": "Flight XY51 to Tokyo",
"start": "2020-04-01T09:00:00", "start": "2020-04-01T09:00:00",
"timeZone": "Europe/Berlin", "timeZone": "Europe/Berlin",
"duration": "PT10H30M", "duration": "PT10H30M",
"locations": { "locations": {
"418d0b9b-b656-4b3c-909f-5b149ca779c9": { "1": {
"@type": "Location", "@type": "Location",
"rel": "start", "rel": "start",
"name": "Frankfurt Airport (FRA)" "name": "Frankfurt Airport (FRA)"
}, },
"c2c7ac67-dc13-411e-a7d4-0780fb61fb08": { "2": {
"@type": "Location", "@type": "Location",
"rel": "end", "rel": "end",
"name": "Narita International Airport (NRT)", "name": "Narita International Airport (NRT)",
"timeZone": "Asia/Tokyo" "timeZone": "Asia/Tokyo"
} }
} }
} }
6.7. Floating-time event (with recurrence) 6.7. Floating-Time Event (with Recurrence)
This example illustrates the use of floating time. Since January 1, This example illustrates the use of floating time. Since January 1,
2020, a calendar user blocks 30 minutes every day to practice Yoga at 2020, a calendar user blocks 30 minutes every day to practice yoga at
7am local time, in whatever time zone the user is located on that 7 am local time in whatever time zone the user is located on that
date. date.
{ {
"...": "", "...": "",
"title": "Yoga", "title": "Yoga",
"start": "2020-01-01T07:00:00", "start": "2020-01-01T07:00:00",
"duration": "PT30M", "duration": "PT30M",
"recurrenceRules": [{ "recurrenceRules": [{
"@type": "RecurrenceRule", "@type": "RecurrenceRule",
"frequency": "daily" "frequency": "daily"
}] }]
} }
6.8. Event with multiple locations and localization 6.8. Event with Multiple Locations and Localization
This example illustrates an event that happens at both a physical and This example illustrates an event that happens at both a physical and
a virtual location. Fans can see a live concert on premises or a virtual location. Fans can see a live concert on premises or
online. The event title and descriptions are localized. online. The event title and descriptions are localized.
{ {
"...": "", "...": "",
"title": "Live from Music Bowl: The Band", "title": "Live from Music Bowl: The Band",
"description": "Go see the biggest music event ever!", "description": "Go see the biggest music event ever!",
"locale": "en", "locale": "en",
"start": "2020-07-04T17:00:00", "start": "2020-07-04T17:00:00",
"timeZone": "America/New_York", "timeZone": "America/New_York",
"duration": "PT3H", "duration": "PT3H",
"locations": { "locations": {
"c0503d30-8c50-4372-87b5-7657e8e0fedd": { "c0503d30-8c50-4372-87b5-7657e8e0fedd": {
"@type": "Location", "@type": "Location",
"name": "The Music Bowl", "name": "The Music Bowl",
"description": "Music Bowl, Central Park, New York", "description": "Music Bowl, Central Park, New York",
"coordinates": "geo:40.7829,-73.9654" "coordinates": "geo:40.7829,-73.9654"
} }
}, },
"virtualLocations": { "virtualLocations": {
"1": { "vloc1": {
"@type": "VirtualLocation", "@type": "VirtualLocation",
"name": "Free live Stream from Music Bowl", "name": "Free live Stream from Music Bowl",
"uri": "https://stream.example.com/the_band_2020" "uri": "https://stream.example.com/the_band_2020"
} }
}, },
"localizations": { "localizations": {
"de": { "de": {
"title": "Live von der Music Bowl: The Band!", "title": "Live von der Music Bowl: The Band!",
"description": "Schau dir das groesste Musikereignis an!", "description": "Schau dir das größte Musikereignis an!",
"virtualLocations/1/name": "Gratis Live-Stream aus der Music Bowl" "virtualLocations/vloc1/name":
} "Gratis Live-Stream aus der Music Bowl"
} }
} }
6.9. Recurring event with overrides }
6.9. Recurring Event with Overrides
This example illustrates the use of recurrence overrides. A math This example illustrates the use of recurrence overrides. A math
course at a University is held for the first time on January 8, 2020 course at a university is held for the first time on January 8, 2020
at 9am London time and occurs every week until June 24, 2020. Each at 9 am London time and occurs every week until June 24, 2020. Each
lecture lasts for one hour and 30 minutes and is located at the lecture lasts for one hour and 30 minutes and is located at the
Mathematics department. This event has exceptional occurrences: at Mathematics department. This event has exceptional occurrences: at
the last occurrence of the course is an exam, which lasts for 2 hours the last occurrence of the course is an exam, which lasts for 2 hours
and starts at 10am. Also, the location of the exam differs from the and starts at 10 am. Also, the location of the exam differs from the
usual location. On April 1 no course is held. On January 7 at 2pm usual location. On April 1, no course is held. On January 7 at 2
is an optional introduction course, that occurs before the first pm, there is an optional introduction course, which occurs before the
regular lecture. first regular lecture.
{ {
"...": "", "...": "",
"title": "Calculus I", "title": "Calculus I",
"start": "2020-01-08T09:00:00", "start": "2020-01-08T09:00:00",
"timeZone": "Europe/London", "timeZone": "Europe/London",
"duration": "PT1H30M", "duration": "PT1H30M",
"locations": { "locations": {
"0dfb8ace-aad1-4734-b3b4-a2fe3d6ae1c5": { "mlab": {
"@type": "Location", "@type": "Location",
"title": "Math lab room 1", "title": "Math lab room 1",
"description": "Math Lab I, Department of Mathematics" "description": "Math Lab I, Department of Mathematics"
} }
}, },
"recurrenceRules": [{ "recurrenceRules": [{
"@type": "RecurrenceRule", "@type": "RecurrenceRule",
"frequency": "weekly", "frequency": "weekly",
"until": "2020-06-24T09:00:00" "until": "2020-06-24T09:00:00"
}], }],
skipping to change at page 56, line 35 skipping to change at line 2632
"title": "Introduction to Calculus I (optional)" "title": "Introduction to Calculus I (optional)"
}, },
"2020-04-01T09:00:00": { "2020-04-01T09:00:00": {
"excluded": true "excluded": true
}, },
"2020-06-25T09:00:00": { "2020-06-25T09:00:00": {
"title": "Calculus I Exam", "title": "Calculus I Exam",
"start": "2020-06-25T10:00:00", "start": "2020-06-25T10:00:00",
"duration": "PT2H", "duration": "PT2H",
"locations": { "locations": {
"84d639ca-37ac-4a86-81e5-9bbba8eb4053": { "auditorium": {
"@type": "Location", "@type": "Location",
"title": "Big Auditorium", "title": "Big Auditorium",
"description": "Big Auditorium, Other Road" "description": "Big Auditorium, Other Road"
} }
} }
} }
} }
} }
6.10. Recurring event with participants 6.10. Recurring Event with Participants
This example illustrates scheduled events. A team meeting occurs This example illustrates scheduled events. A team meeting occurs
every week since January 8, 2020 at 9am Johannesburg time. The event every week since January 8, 2020 at 9 am Johannesburg time. The
owner also chairs the event. Participants meet in a virtual meeting event owner also chairs the event. Participants meet in a virtual
room. An attendee has accepted the invitation, but on March 4, 2020 meeting room. An attendee has accepted the invitation, but, on March
he is unavailable and declined participation for this occurrence. 4, 2020, he is unavailable and declined participation for this
occurrence.
{ {
"...": "", "...": "",
"title": "FooBar team meeting", "title": "FooBar team meeting",
"start": "2020-01-08T09:00:00", "start": "2020-01-08T09:00:00",
"timeZone": "Africa/Johannesburg", "timeZone": "Africa/Johannesburg",
"duration": "PT1H", "duration": "PT1H",
"virtualLocations": { "virtualLocations": {
"3f41b47b-a5eb-494f-90eb-19d279486d84": { "0": {
"@type": "VirtualLocation", "@type": "VirtualLocation",
"name": "ChatMe meeting room", "name": "ChatMe meeting room",
"uri": "https://chatme.example.com?id=1234567&pw=a8a24627b63d396e" "uri": "https://chatme.example.com?id=1234567&pw=a8a24627b63d"
} }
}, },
"recurrenceRules": [{ "recurrenceRules": [{
"@type": "RecurrenceRule", "@type": "RecurrenceRule",
"frequency": "weekly" "frequency": "weekly"
}], }],
"replyTo": { "replyTo": {
"imip": "mailto:f245f875-7f63-4a5e-a2c8@schedule.example.com" "imip": "mailto:f245f875-7f63-4a5e-a2c8@schedule.example.com"
}, },
"participants": { "participants": {
"dG9tQGZvb2Jhci5xlLmNvbQ": { "dG9tQGZvb2Jhci5xlLmNvbQ": {
"@type": "Participant", "@type": "Participant",
"name": "Tom Tool", "name": "Tom Tool",
"email": "tom@foobar.example.com", "email": "tom@foobar.example.com",
"sendTo": { "sendTo": {
"imip": "mailto:tom@calendar.example.com" "imip": "mailto:tom@calendar.example.com"
}, },
"participationStatus": "accepted", "participationStatus": "accepted",
"roles": { "roles": {
"attendee": true "attendee": true
} }
}, },
"em9lQGZvb2GFtcGxlLmNvbQ": { "em9lQGZvb2GFtcGxlLmNvbQ": {
"@type": "Participant", "@type": "Participant",
"name": "Zoe Zelda", "name": "Zoe Zelda",
"email": "zoe@foobar.example.com", "email": "zoe@foobar.example.com",
"sendTo": { "sendTo": {
"imip": "mailto:zoe@foobar.example.com" "imip": "mailto:zoe@foobar.example.com"
}, },
"participationStatus": "accepted", "participationStatus": "accepted",
"roles": { "roles": {
"owner": true, "owner": true,
"attendee": true, "attendee": true,
"chair": true "chair": true
} }
} }
}, },
"recurrenceOverrides": { "recurrenceOverrides": {
"2020-03-04T09:00:00": { "2020-03-04T09:00:00": {
"participants/dG9tQGZvb2Jhci5xlLmNvbQ/participationStatus": "participants/dG9tQGZvb2Jhci5xlLmNvbQ/participationStatus":
"declined" "declined"
} }
} }
} }
7. Security Considerations 7. Security Considerations
Calendaring and scheduling information is very privacy-sensitive. It Calendaring and scheduling information is very privacy sensitive. It
can reveal the social network of a user; location information of this can reveal the social network of a user, location information of this
user and those in their social network; identity and credentials user and those in their social network, identity and credentials
information; and the patterns of behavior of the user in both the information, and patterns of behavior of the user in both the
physical and cyber realm. Additionally, calendar events and tasks physical and cyber realm. Additionally, calendar events and tasks
can could influence the physical location of a user or their cyber can influence the physical location of a user or their cyber behavior
behavior within a known time window. Its transmission and storage within a known time window. Its transmission and storage must be
must be done carefully to protect it from possible threats, such as done carefully to protect it from possible threats, such as
eavesdropping, replay, message insertion, deletion, modification, and eavesdropping, replay, message insertion, deletion, modification, and
on-path attacks. on-path attacks.
The data being stored and transmitted may be used in systems with The data being stored and transmitted may be used in systems with
real world consequences. For example, a home automation system may real-world consequences. For example, a home automation system may
turn an alarm on and off. Or a coworking space may charge money to turn an alarm on and off or a coworking space may charge money to the
the organiser of an event that books one of their meeting rooms. organizer of an event that books one of their meeting rooms. Such
Such systems must be careful to authenticate all data they receive to systems must be careful to authenticate all data they receive to
prevent them from being subverted, and ensure the change comes from prevent them from being subverted and ensure the change comes from an
an authorized entity. authorized entity.
This document just defines the data format; such considerations are This document only defines the data format; such considerations are
primarily the concern of the API or method of storage and primarily the concern of the API or method of storage and
transmission of such files. transmission of such files.
7.1. Expanding Recurrences 7.1. Expanding Recurrences
A recurrence rule may produce infinite occurrences of an event. A recurrence rule may produce infinite occurrences of an event.
Implementations MUST handle expansions carefully to prevent Implementations MUST handle expansions carefully to prevent
accidental or deliberate resource exhaustion. accidental or deliberate resource exhaustion.
Conversely, a recurrence rule may be specified that does not expand Conversely, a recurrence rule may be specified that does not expand
to anything. It is not always possible to tell this through static to anything. It is not always possible to tell this through static
analysis of the rule, so implementations MUST be careful to avoid analysis of the rule, so implementations MUST be careful to avoid
getting stuck in infinite loops, or otherwise exhausting resources getting stuck in infinite loops or otherwise exhausting resources
while searching for the next occurrence. while searching for the next occurrence.
Events recur in the event's time zone. If the user is in a different Events recur in the event's time zone. If the user is in a different
time zone, daylight saving transitions may cause an event that time zone, daylight saving transitions may cause an event that
normally occurs at, for example, 9am to suddenly shift an hour normally occurs at, for example, 9 am to suddenly shift an hour
earlier. This may be used in an attempt to cause a participant to earlier. This may be used in an attempt to cause a participant to
miss an important meeting. User agents must be careful to translate miss an important meeting. User agents must be careful to translate
date-times correctly between time zones and may wish to call out date-times correctly between time zones and may wish to call out
unexpected changes in the time of a recurring event. unexpected changes in the time of a recurring event.
7.2. JSON Parsing 7.2. JSON Parsing
The Security Considerations of [RFC8259] apply to the use of JSON as The security considerations of [RFC8259] apply to the use of JSON as
the data interchange format. the data interchange format.
As for any serialization format, parsers need to thoroughly check the As for any serialization format, parsers need to thoroughly check the
syntax of the supplied data. JSON uses opening and closing tags for syntax of the supplied data. JSON uses opening and closing tags for
several types and structures, and it is possible that the end of the several types and structures, and it is possible that the end of the
supplied data will be reached when scanning for a matching closing supplied data will be reached when scanning for a matching closing
tag; this is an error condition, and implementations need to stop tag; this is an error condition, and implementations need to stop
scanning at the end of the supplied data. scanning at the end of the supplied data.
JSON also uses a string encoding with some escape sequences to encode JSON also uses a string encoding with some escape sequences to encode
skipping to change at page 59, line 44 skipping to change at line 2787
allocations they are willing to make in any given context, to avoid allocations they are willing to make in any given context, to avoid
untrusted data causing excessive memory allocation. untrusted data causing excessive memory allocation.
7.3. URI Values 7.3. URI Values
Several JSCalendar properties contain URIs as values, and processing Several JSCalendar properties contain URIs as values, and processing
these properties requires extra care. Section 7 of [RFC3986] these properties requires extra care. Section 7 of [RFC3986]
discusses security risks related to URIs. discusses security risks related to URIs.
Fetching remote resources carries inherent risks. Connections must Fetching remote resources carries inherent risks. Connections must
only be allowed on well known ports, using allowed protocols only be allowed on well-known ports, using allowed protocols
(generally just HTTP/HTTPS on their default ports). The URL must be (generally, just HTTP/HTTPS on their default ports). The URL must be
resolved externally and not allowed to access internal resources. resolved externally and not allowed to access internal resources.
Connecting to an external source reveals IP (and therefore generally Connecting to an external source reveals IP (and therefore often
location) information. location) information.
A maliciously constructed JSCalendar object may contain a very large A maliciously constructed JSCalendar object may contain a very large
number of URIs. In the case of published calendars with a large number of URIs. In the case of published calendars with a large
number of subscribers, such objects could be widely distributed. number of subscribers, such objects could be widely distributed.
Implementations should be careful to limit the automatic fetching of Implementations should be careful to limit the automatic fetching of
linked resources to reduce the risk of this being an amplification linked resources to reduce the risk of this being an amplification
vector for a denial-of-service attack. vector for a denial-of-service attack.
7.4. Spam 7.4. Spam
Calendar systems may receive JSCalendar files from untrusted sources, Calendar systems may receive JSCalendar files from untrusted sources,
in particular as attachments to emails. This can be a vector for an in particular, as attachments to emails. This can be a vector for an
attacker to inject spam into a user's calendar. This may confuse, attacker to inject spam into a user's calendar. This may confuse,
annoy, and mislead users, or overwhelm their calendar with bogus annoy, and mislead users or overwhelm their calendar with bogus
events, preventing them from seeing legitimate ones. events, preventing them from seeing legitimate ones.
Heuristic, statistical or machine-learning-based filters can be Heuristic, statistical, or machine-learning-based filters can be
effective in filtering out spam. Authentication mechanisms such as effective in filtering out spam. Authentication mechanisms, such as
DKIM [RFC6376] can help establish the source of messages and DomainKeys Identified Mail (DKIM) [RFC6376], can help establish the
associate the data with existing relationships (such as an address source of messages and associate the data with existing relationships
book contact). Misclassifications are always possible, however, and (such as an address book contact). However, misclassifications are
providing a mechanism for users to quickly correct this is advised. always possible and providing a mechanism for users to quickly
correct this is advised.
Confusable unicode characters may be used to trick a user into Confusable unicode characters may be used to trick a user into
trusting a JSCalendar file that appears to come from a known contact trusting a JSCalendar file that appears to come from a known contact
but is actually from a similar-looking source controlled by an but is actually from a similar-looking source controlled by an
attacker. attacker.
7.5. Duplication 7.5. Duplication
It is important for calendar systems to maintain the UID of an event It is important for calendar systems to maintain the UID of an event
when updating it to avoid unexpected duplication of events. when updating it to avoid an unexpected duplication of events.
Consumers of the data may not remove the previous version of the Consumers of the data may not remove the previous version of the
event if it has a different UID. This can lead to a confusing event if it has a different UID. This can lead to a confusing
situation for the user, with many variations of the event and no situation for the user, with many variations of the event and no
indication of which one is correct. Care must be taken by consumers indication of which one is correct. Care must be taken by consumers
of the data to remove old events where possible to avoid an of the data to remove old events where possible to avoid an
accidental denial-of-service attack due to the volume of data. accidental denial-of-service attack due to the volume of data.
7.6. Time Zones 7.6. Time Zones
Events recur in a particular time zone. When this differs from the Events recur in a particular time zone. When this differs from the
skipping to change at page 61, line 19 skipping to change at line 2854
This document defines a media type for use with JSCalendar data This document defines a media type for use with JSCalendar data
formatted in JSON. formatted in JSON.
Type name: application Type name: application
Subtype name: jscalendar+json Subtype name: jscalendar+json
Required parameters: type Required parameters: type
The "type" parameter conveys the type of the JSCalendar data in The "type" parameter conveys the type of the JSCalendar data in
the body part, with the value being one of "jsevent", "jstask", or the body part. The allowed parameter values correspond to the
"jsgroup". The parameter MUST NOT occur more than once. It MUST "@type" property of the JSON-formatted JSCalendar object in the
match the value of the "@type" property of the JSON-formatted body:
JSCalendar object in the body.
"event": The "@type" property value MUST be "Event".
"task": The "@type" property value MUST be "Task".
"group": The "@type" property value MUST be "Group".
No other parameter values are allowed. The parameter MUST NOT
occur more than once.
Optional parameters: none Optional parameters: none
Encoding considerations: Same as encoding considerations of Encoding considerations: This is the same as the encoding
application/json as specified in RFC8529, Section 11 [RFC8259]. considerations of application/json, as specified in Section 11 of
[RFC8259].
Security considerations: See Section 7 of this document. Security considerations: See Section 7 of this document.
Interoperability considerations: While JSCalendar is designed to Interoperability considerations: While JSCalendar is designed to
avoid ambiguities as much as possible, when converting objects avoid ambiguities as much as possible, when converting objects
from other calendar formats to/from JSCalendar it is possible that from other calendar formats to/from JSCalendar, it is possible
differing representations for the same logical data might arise, that differing representations for the same logical data or
or ambiguities in interpretation. The semantic equivalence of two ambiguities in interpretation might arise. The semantic
JSCalendar objects may be determined differently by different equivalence of two JSCalendar objects may be determined
applications, for example where URL values differ in case between differently by different applications, for example, where URL
the two objects. values differ in case between the two objects.
Published specification: This specification. Published specification: RFC 8984
Applications that use this media type: Applications that currently Applications that use this media type: Applications that currently
make use of the text/calendar and application/calendar+json media make use of the text/calendar and application/calendar+json media
types can use this as an alternative. Similarly, applications types can use this as an alternative. Similarly, applications
that use the application/json media type to transfer calendaring that use the application/json media type to transfer calendaring
data can use this to further specify the content. data can use this to further specify the content.
Fragment identifier considerations: A JSON Pointer fragment Fragment identifier considerations: A JSON Pointer fragment
identifier may be used, as defined in [RFC6901], Section 6. identifier may be used, as defined in [RFC6901], Section 6.
Additional information: Additional information: Magic number(s): N/A
Magic number(s): N/A
File extensions(s): N/A File extensions(s): N/A
Macintosh file type code(s): N/A Macintosh file type code(s): N/A
Person & email address to contact for further information: Person & email address to contact for further information: calsify@i
calsify@ietf.org etf.org
Intended usage: COMMON Intended usage: COMMON
Restrictions on usage: N/A Restrictions on usage: N/A
Author: See the "Author's Address" section of this document. Author: See the "Author's Address" section of this document.
Change controller: IETF Change controller: IETF
8.2. Creation of "JSCalendar Properties" Registry 8.2. Creation of the "JSCalendar Properties" Registry
The IANA will create the "JSCalendar Properties" registry to allow IANA has created the "JSCalendar Properties" registry to allow
interoperability of extensions to JSCalendar objects. interoperability of extensions to JSCalendar objects.
This registry follows the Expert Review process ([RFC8126], This registry follows the Expert Review process ([RFC8126],
Section 4.5). If the "intended use" field is "common", sufficient Section 4.5). If the "Intended Usage" field is "common", sufficient
documentation is required to enable interoperability. Preliminary documentation is required to enable interoperability. Preliminary
community review for this registry is optional but strongly community review for this registry is optional but strongly
encouraged. encouraged.
A registration can have an intended use of "common", "reserved", or A registration can have an intended usage of "common", "reserved", or
"obsolete". The IANA will list common-use registrations prominently "obsolete". IANA will list registrations with a common usage
and separately from those with other intended use values. designation prominently and separately from those with other intended
usage values.
A "reserved" registration reserves a property name without assigning A "reserved" registration reserves a property name without assigning
semantics to avoid name collisions with future extensions or protocol semantics to avoid name collisions with future extensions or protocol
use. use.
An "obsolete" registration denotes a property that is no longer An "obsolete" registration denotes a property that is no longer
expected to be added by up-to-date systems. A new property has expected to be added by up-to-date systems. A new property has
probably been defined covering the obsolete property's semantics. probably been defined covering the obsolete property's semantics.
The JSCalendar property registration procedure is not a formal The JSCalendar property registration procedure is not a formal
standards process but rather an administrative procedure intended to standards process but rather an administrative procedure intended to
allow community comment and sanity checking without excessive time allow community comment and check it is coherent without excessive
delay. It is designed to encourage vendors to document and register time delay. It is designed to encourage vendors to document and
new properties they add for use cases not covered by the original register new properties they add for use cases not covered by the
specification, leading to increased interoperability. original specification, leading to increased interoperability.
8.2.1. Preliminary Community Review 8.2.1. Preliminary Community Review
Notice of a potential new registration SHOULD be sent to the Calext Notice of a potential new registration SHOULD be sent to the Calext
mailing list <calsify@ietf.org> for review. This mailing list is mailing list <calsify@ietf.org> for review. This mailing list is
appropriate to solicit community feedback on a proposed new property. appropriate to solicit community feedback on a proposed new property.
Properties registrations must be marked with their intended use: Property registrations must be marked with their intended use:
"common", "reserved" or "obsolete". "common", "reserved", or "obsolete".
The intent of the public posting to this list is to solicit comments The intent of the public posting to this list is to solicit comments
and feedback on the choice of the property name, the unambiguity of and feedback on the choice of the property name, the unambiguity of
the specification document, and a review of any interoperability or the specification document, and a review of any interoperability or
security considerations. The submitter may submit a revised security considerations. The submitter may submit a revised
registration proposal or abandon the registration completely at any registration proposal or abandon the registration completely at any
time. time.
8.2.2. Submit Request to IANA 8.2.2. Submit Request to IANA
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8.2.3. Designated Expert Review 8.2.3. Designated Expert Review
The primary concern of the designated expert (DE) is preventing name The primary concern of the designated expert (DE) is preventing name
collisions and encouraging the submitter to document security and collisions and encouraging the submitter to document security and
privacy considerations. For a common-use registration, the DE is privacy considerations. For a common-use registration, the DE is
expected to confirm that suitable documentation, as described in expected to confirm that suitable documentation, as described in
Section 4.6 of [RFC8126], is available to ensure interoperability. Section 4.6 of [RFC8126], is available to ensure interoperability.
That documentation will usually be in an RFC, but simple definitions That documentation will usually be in an RFC, but simple definitions
are likely to use a web/wiki page, and if a sentence or two is deemed are likely to use a web/wiki page, and if a sentence or two is deemed
sufficient it could be described in the registry itself. The DE sufficient, it could be described in the registry itself. The DE
should also verify that the property name does not conflict with work should also verify that the property name does not conflict with work
that is active or already published within the IETF. A published that is active or already published within the IETF. A published
specification is not required for reserved or obsolete registrations. specification is not required for reserved or obsolete registrations.
The DE will either approve or deny the registration request and The DE will either approve or deny the registration request and
publish a notice of the decision to the Calext WG mailing list or its publish a notice of the decision to the Calext WG mailing list or its
successor, as well as inform IANA. A denial notice must be justified successor, as well as inform IANA. A denial notice must be justified
by an explanation, and, in the cases where it is possible, concrete by an explanation, and, in the cases where it is possible, concrete
suggestions on how the request can be modified so as to become suggestions on how the request can be modified so as to become
acceptable should be provided. acceptable should be provided.
8.2.4. Change Procedures 8.2.4. Change Procedures
Once a JSCalendar property has been published by the IANA, the change Once a JSCalendar property has been published by IANA, the change
controller may request a change to its definition. The same controller may request a change to its definition. The same
procedure that would be appropriate for the original registration procedure that would be appropriate for the original registration
request is used to process a change request. request is used to process a change request.
JSCalendar property registrations may not be deleted; properties that JSCalendar property registrations may not be deleted; properties that
are no longer believed appropriate for use can be declared obsolete are no longer believed appropriate for use can be declared obsolete
by a change to their "intended use" field; such properties will be by a change to their "intended usage" field; such properties will be
clearly marked in the lists published by the IANA. clearly marked in the IANA registry.
Significant changes to a JSCalendar property's definition should be Significant changes to a JSCalendar property's definition should be
requested only when there are serious omissions or errors in the requested only when there are serious omissions or errors in the
published specification, as such changes may cause interoperability published specification, as such changes may cause interoperability
issues. When review is required, a change request may be denied if issues. When review is required, a change request may be denied if
it renders entities that were valid under the previous definition it renders entities that were valid under the previous definition
invalid under the new definition. invalid under the new definition.
The owner of a JSCalendar property may pass responsibility to another The owner of a JSCalendar property may pass responsibility to another
person or agency by informing the IANA; this can be done without person or agency by informing IANA; this can be done without
discussion or review. discussion or review.
8.2.5. JSCalendar Properties Registry Template 8.2.5. "JSCalendar Properties" Registry Template
o Property Name: The name of the property. The property name MUST Property Name: This is the name of the property. The property name
NOT already be registered for any of the object types listed in MUST NOT already be registered for any of the object types listed
the "Property Context" field of this registration. Other object in the "Property Context" field of this registration. Other
types MAY already have registered a different property with the object types MAY already have registered a different property with
same name, however the same name SHOULD only be used when the the same name; however, the same name SHOULD only be used when the
semantics are analogous. semantics are analogous.
o Property Type: The type of this property, using type signatures as Property Type: This is the type of this property, using type
specified in Section 1.3. The property type MUST be registed in signatures, as specified in Section 1.3. The property type MUST
the Type Registry. be registered in the "JSCalendar Types" registry.
o Property Context: A comma-separated list of JSCalendar object Property Context: This is a comma-separated list of JSCalendar
types this property is allowed on. object types this property is allowed on.
o Reference or Description: A brief description or RFC number and Reference or Description: This is a brief description or RFC number
section reference where the property is specified (omitted for and section reference where the property is specified (omitted for
"reserved" property names). "reserved" property names).
o Intended Use: Common, reserved, or obsolete. Intended Usage: This may be "common", "reserved", or "obsolete".
o Change Controller: Who may request a change to this entry's Change Controller: This is who may request a change to this entry's
definition ("IETF" for IETF-stream RFCs). definition ("IETF" for RFCs from the IETF stream).
8.2.6. Initial Contents for the JSCalendar Properties Registry 8.2.6. Initial Contents for the "JSCalendar Properties" Registry
The following table lists the initial entries of the JSCalendar The following table lists the initial entries of the "JSCalendar
Properties registry. All properties are for common-use. All RFC Properties" registry. All properties are for common use. All RFC
section references are for this document. The change controller for section references are for this document. The change controller for
all these properties is "IETF". all these properties is "IETF".
+---------------+----------------------------+------------+---------+ +====================+=================+================+===========+
| Property Name | Property Type | Property | Referen | |Property Name |Property Type |Property Context|Reference |
| | | Context | ce or D | | | | |or |
| | | | escript | | | | |Description|
| | | | ion | +====================+=================+================+===========+
+---------------+----------------------------+------------+---------+ |@type |String |Event, Task, |Section |
| @type | String | JSEvent, | Section | | | |Group, |4.1.1, |
| | | JSTask, | 4.1.1, | | | |AbsoluteTrigger,|Section |
| | | JSGroup, A | Section | | | |Alert, Link, |4.5.2, |
| | | bsoluteTri | 4.5.2, | | | |Location, NDay, |Section |
| | | gger, | Section | | | |OffsetTrigger, |1.4.11, |
| | | Alert, | 1.4.11 | | | |Participant, |Section |
| | | Link, | , Secti | | | |RecurrenceRule, |4.2.5, |
| | | Location, | on 4.2. | | | |Relation, |Section |
| | | NDay, Offs | 5, Sect | | | |TimeZone, |4.4.6, |
| | | etTrigger, | ion 4.4 | | | |TimeZoneRule, |Section |
| | | Participan | .5, Sec | | | |VirtualLocation |4.3.3, |
| | | t, Recurre | tion 4. | | | | |Section |
| | | nceRule, | 3.2, Se | | | | |1.4.10, |
| | | Relation, | ction 4 | | | | |Section |
| | | TimeZone, | .1.3, S | | | | |4.7.2, |
| | | TimeZoneRu | ection | | | | |Section |
| | | le, Virtua | 4.7.2, | | | | |4.2.6 |
| | | lLocation | Section | +--------------------+-----------------+----------------+-----------+
| | | | 4.7.2, | |acknowledged |UTCDateTime |Alert |Section |
| | | | Section | | | | |4.5.2 |
| | | | 4.2.6 | +--------------------+-----------------+----------------+-----------+
| | | | | |action |String |Alert |Section |
| acknowledged | UTCDateTime | Alert | Section | | | | |4.5.2 |
| | | | 4.5.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |alerts |Id[Alert] |Event, Task |Section |
| action | String | Alert | Section | | | | |4.5.2 |
| | | | 4.5.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |aliases |String[Boolean] |TimeZone |Section |
| alerts | Id[Alert] | JSEvent, | Section | | | | |4.7.2 |
| | | JSTask | 4.5.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byDay |NDay[] |RecurrenceRule |Section |
| aliases | String[Boolean] | TimeZone | Section | | | | |4.3.3 |
| | | | 4.7.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byHour |UnsignedInt[] |RecurrenceRule |Section |
| byDay | NDay[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byMinute |UnsignedInt[] |RecurrenceRule |Section |
| byHour | UnsignedInt[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byMonth |String[] |RecurrenceRule |Section |
| byMinute | UnsignedInt[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byMonthDay |Int[] |RecurrenceRule |Section |
| byMonth | String[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |bySecond |UnsignedInt[] |RecurrenceRule |Section |
| byMonthDay | Int[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |bySetPosition |Int[] |RecurrenceRule |Section |
| bySecond | UnsignedInt[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byWeekNo |Int[] |RecurrenceRule |Section |
| bySetPosition | Int[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |byYearDay |Int[] |RecurrenceRule |Section |
| byWeekNo | Int[] | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |categories |String[Boolean] |Event, Task, |Section |
| byYearDay | Int[] | Recurrence | Section | | | |Group |4.2.10 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |cid |String |Link |Section |
| categories | String[Boolean] | JSEvent, | Section | | | | |1.4.11 |
| | | JSTask, | 4.2.10 | +--------------------+-----------------+----------------+-----------+
| | | JSGroup | | |color |String |Event, Task, |Section |
| | | | | | | |Group |4.2.11 |
| cid | String | Link | Section | +--------------------+-----------------+----------------+-----------+
| | | | 1.4.11 | |comments |String[] |TimeZoneRule |Section |
| | | | | | | | |4.7.2 |
| color | String | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSTask, | 4.2.11 | |contentType |String |Link |Section |
| | | JSGroup | | | | | |1.4.11 |
| | | | | +--------------------+-----------------+----------------+-----------+
| comments | String[] | TimeZoneRu | Section | |coordinates |String |Location |Section |
| | | le | 4.7.2 | | | | |4.2.5 |
| | | | | +--------------------+-----------------+----------------+-----------+
| contentType | String | Link | Section | |count |UnsignedInt |RecurrenceRule |Section |
| | | | 1.4.11 | | | | |4.3.3 |
| | | | | +--------------------+-----------------+----------------+-----------+
| coordinates | String | Location | Section | |created |UTCDateTime |Event, Task, |Section |
| | | | 4.2.5 | | | |Group |4.1.5 |
| | | | | +--------------------+-----------------+----------------+-----------+
| count | UnsignedInt | Recurrence | Section | |day |String |NDay |Section |
| | | Rule | 4.3.2 | | | | |4.3.3 |
| | | | | +--------------------+-----------------+----------------+-----------+
| created | UTCDateTime | JSEvent, | Section | |daylight |TimeZoneRule[] |TimeZone |Section |
| | | JSTask, | 4.1.5 | | | | |4.7.2 |
| | | JSGroup | | +--------------------+-----------------+----------------+-----------+
| | | | | |delegatedFrom |Id[Boolean] |Participant |Section |
| day | String | NDay | Section | | | | |4.4.6 |
| | | | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |delegatedTo |Id[Boolean] |Participant |Section |
| daylight | TimeZoneRule | TimeZone | Section | | | | |4.4.6 |
| | | | 4.7.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |description |String |Event, Task, |Section |
| delegatedFrom | String[Boolean] | Participan | Section | | | |Location, |4.2.2, |
| | | t | 4.4.5 | | | |Participant, |Section |
| | | | | | | |VirtualLocation |4.2.5, |
| delegatedTo | String[Boolean] | Participan | Section | | | | |Section |
| | | t | 4.4.5 | | | | |4.4.6, |
| | | | | | | | |Section |
| description | String | JSEvent, | Section | | | | |4.2.6 |
| | | JSTask, | 4.2.2, | +--------------------+-----------------+----------------+-----------+
| | | Location, | Section | |description |String |Event, Task |Section |
| | | Participan | 4.2.5, | |ContentType | | |4.2.3 |
| | | t, Virtual | Section | +--------------------+-----------------+----------------+-----------+
| | | Location | 4.4.5, | |display |String |Link |Section |
| | | | Section | | | | |1.4.11 |
| | | | 4.2.6 | +--------------------+-----------------+----------------+-----------+
| | | | | |due |LocalDateTime |Task |Section |
| descriptionCo | String | JSEvent, | Section | | | | |5.2.1 |
| ntentType | | JSTask | 4.2.3 | +--------------------+-----------------+----------------+-----------+
| | | | | |duration |Duration |Event |Section |
| display | String | Link | Section | | | | |5.1.2 |
| | | | 1.4.11 | +--------------------+-----------------+----------------+-----------+
| | | | | |email |String |Participant |Section |
| due | LocalDateTime | JSTask | Section | | | | |4.4.6 |
| | | | 5.2.1 | +--------------------+-----------------+----------------+-----------+
| | | | | |entries |(Task|Event)[] |Group |Section |
| duration | Duration | JSEvent | Section | | | | |5.3.1 |
| | | | 5.1.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |estimatedDuration |Duration |Task |Section |
| email | String | Participan | Section | | | | |5.2.3 |
| | | t | 4.4.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |excluded |Boolean |Event, Task |Section |
| entries | (JSTask|JSEvent)[] | JSGroup | Section | | | | |4.3.6 |
| | | | 5.3.1 | +--------------------+-----------------+----------------+-----------+
| | | | | |excluded |RecurrenceRule[] |Event, Task |Section |
| estimatedDura | Duration | JSTask | Section | |RecurrenceRules | | |4.3.4 |
| tion | | | 5.2.3 | +--------------------+-----------------+----------------+-----------+
| | | | | |expectReply |Boolean |Participant |Section |
| excluded | Boolean | JSEvent, | Section | | | | |4.4.6 |
| | | JSTask | 4.3.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |features |String[Boolean] |VirtualLocation |Section |
| excludedRecur | RecurrenceRule[] | JSEvent, | Section | | | | |4.2.6 |
| renceRules | | JSTask | 4.3.3 | +--------------------+-----------------+----------------+-----------+
| | | | | |firstDayOfWeek |String |RecurrenceRule |Section |
| expectReply | Boolean | Participan | Section | | | | |4.3.3 |
| | | t | 4.4.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |freeBusyStatus |String |Event, Task |Section |
| firstDayOfWee | String | Recurrence | Section | | | | |4.4.2 |
| k | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |frequency |String |RecurrenceRule |Section |
| freeBusyStatu | String | JSEvent, | Section | | | | |4.3.3 |
| s | | JSTask | 4.4.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |href |String |Link |Section |
| frequency | String | Recurrence | Section | | | | |1.4.11 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |interval |UnsignedInt |RecurrenceRule |Section |
| href | String | Link | Section | | | | |4.3.3 |
| | | | 1.4.11 | +--------------------+-----------------+----------------+-----------+
| | | | | |invitedBy |Id |Participant |Section |
| interval | UnsignedInt | Recurrence | Section | | | | |4.4.6 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |keywords |String[Boolean] |Event, Task, |Section |
| invitedBy | String | Participan | Section | | | |Group |4.2.9 |
| | | t | 4.4.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |kind |String |Participant |Section |
| keywords | String[Boolean] | JSEvent, | Section | | | | |4.4.6 |
| | | JSTask, | 4.2.9 | +--------------------+-----------------+----------------+-----------+
| | | JSGroup | | |language |String |Participant |Section |
| | | | | | | | |4.4.6 |
| kind | String | Participan | Section | +--------------------+-----------------+----------------+-----------+
| | | t | 4.4.5 | |links |Id[Link] |Group, Event, |Section |
| | | | | | | |Task, Location, |4.2.7, |
| language | String | Participan | Section | | | |Participant |Section |
| | | t | 4.4.5 | | | | |4.2.5, |
| | | | | | | | |Section |
| links | Id[Link] | JSGroup, | Section | | | | |4.4.6 |
| | | JSEvent, | 4.2.7, | +--------------------+-----------------+----------------+-----------+
| | | JSTask, | Section | |locale |String |Group, Event, |Section |
| | | Location, | 4.2.5, | | | |Task |4.2.8 |
| | | Participan | Section | +--------------------+-----------------+----------------+-----------+
| | | t | 4.4.5 | |localizations |String |Event, Task |Section |
| | | | | | |[PatchObject] | |4.6.1 |
| locale | String | JSGroup, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSEvent, | 4.2.8 | |locationId |Id |Participant |Section |
| | | JSTask | | | | | |4.4.6 |
| | | | | +--------------------+-----------------+----------------+-----------+
| localizations | String[PatchObject] | JSEvent, | Section | |locations |Id[Location] |Event, Task |Section |
| | | JSTask | 4.6.1 | | | | |4.2.5 |
| | | | | +--------------------+-----------------+----------------+-----------+
| locationId | String | Participan | Section | |locationTypes |String[Boolean] |Location |Section |
| | | t | 4.4.5 | | | | |4.2.5 |
| | | | | +--------------------+-----------------+----------------+-----------+
| locations | Id[Location] | JSEvent, | Section | |memberOf |Id[Boolean] |Participant |Section |
| | | JSTask | 4.2.5 | | | | |4.4.6 |
| | | | | +--------------------+-----------------+----------------+-----------+
| locationTypes | String[Boolean] | Location | Section | |method |String |Event, Task |Section |
| | | | 4.2.5 | | | | |4.1.8 |
| | | | | +--------------------+-----------------+----------------+-----------+
| memberOf | String[Boolean] | Participan | Section | |name |String |Location, |Section |
| | | t | 4.4.5 | | | |VirtualLocation,|4.2.5, |
| | | | | | | |Participant |Section |
| method | String | JSEvent, | Section | | | | |4.2.6, |
| | | JSTask | 4.1.8 | | | | |Section |
| | | | | | | | |4.4.6 |
| name | String | Location, | Section | +--------------------+-----------------+----------------+-----------+
| | | VirtualLoc | 4.2.5, | |names |String[Boolean] |TimeZoneRule |Section |
| | | ation, Par | Section | | | | |4.7.2 |
| | | ticipant | 4.2.6, | +--------------------+-----------------+----------------+-----------+
| | | | Section | |nthOfPeriod |Int |NDay |Section |
| | | | 4.4.5 | | | | |4.3.3 |
| | | | | +--------------------+-----------------+----------------+-----------+
| names | String[Boolean] | TimeZoneRu | Section | |offset |SignedDuration |OffsetTrigger |Section |
| | | le | 4.7.2 | | | | |4.5.2 |
| | | | | +--------------------+-----------------+----------------+-----------+
| nthOfPeriod | Int | NDay | Section | |offsetFrom |UTCDateTime |TimeZoneRule |Section |
| | | | 4.3.2 | | | | |4.7.2 |
| | | | | +--------------------+-----------------+----------------+-----------+
| offset | SignedDuration | OffsetTrig | Section | |offsetTo |UTCDateTime |TimeZoneRule |Section |
| | | ger | 4.5.2 | | | | |4.7.2 |
| | | | | +--------------------+-----------------+----------------+-----------+
| offsetFrom | UTCDateTime | TimeZoneRu | Section | |participants |Id[Participant] |Event, Task |Section |
| | | le | 4.7.2 | | | | |4.4.6 |
| | | | | +--------------------+-----------------+----------------+-----------+
| offsetTo | UTCDateTime | TimeZoneRu | Section | |participationComment|String |Participant |Section |
| | | le | 4.7.2 | | | | |4.4.6 |
| | | | | +--------------------+-----------------+----------------+-----------+
| participants | Id[Participant] | JSEvent, | Section | |participationStatus |String |Participant |Section |
| | | JSTask | 4.4.5 | | | | |4.4.6 |
| | | | | +--------------------+-----------------+----------------+-----------+
| participation | String | Participan | Section | |percentComplete |UnsignedInt |Task, |Section |
| Comment | | t | 4.4.5 | | | |Participant |5.2.4 |
| | | | | +--------------------+-----------------+----------------+-----------+
| participation | String | Participan | Section | |priority |Int |Event, Task |Section |
| Status | | t | 4.4.5 | | | | |4.4.1 |
| | | | | +--------------------+-----------------+----------------+-----------+
| percentComple | UnsignedInt | JSTask, Pa | Section | |privacy |String |Event, Task |Section |
| te | | rticipant | 5.2.4 | | | | |4.4.3 |
| | | | | +--------------------+-----------------+----------------+-----------+
| priority | Int | JSEvent, | Section | |prodId |String |Event, Task, |Section |
| | | JSTask | 4.4.1 | | | |Group |4.1.4 |
| | | | | +--------------------+-----------------+----------------+-----------+
| privacy | String | JSEvent, | Section | |progress |String |Task, |Section |
| | | JSTask | 4.4.3 | | | |Participant |5.2.5 |
| | | | | +--------------------+-----------------+----------------+-----------+
| prodId | String | JSEvent, | Section | |progressUpdated |UTCDateTime |Task, |Section |
| | | JSTask, | 4.1.4 | | | |Participant |5.2.6 |
| | | JSGroup | | +--------------------+-----------------+----------------+-----------+
| | | | | |recurrenceId |LocalDateTime |Event, Task |Section |
| progress | String | JSTask, Pa | Section | | | | |4.3.1 |
| | | rticipant | 5.2.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |recurrenceIdTimeZone|TimeZoneId|null |Event, Task |Section |
| progressUpdat | UTCDateTime | JSTask, Pa | Section | | | | |4.3.2 |
| ed | | rticipant | 5.2.6 | +--------------------+-----------------+----------------+-----------+
| | | | | |recurrenceOverrides |LocalDateTime |Event, Task, |Section |
| recurrenceId | LocalDateTime | JSEvent, | Section | | |[PatchObject] |TimeZoneRule |4.3.5, |
| | | JSTask | 4.3.1 | | | | |Section |
| | | | | | | | |4.7.2 |
| recurrenceOve | LocalDateTime[PatchObject] | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| rrides | | JSTask, Ti | 4.3.4, | |recurrenceRules |RecurrenceRule[] |Event, Task, |Section |
| | | meZoneRule | Section | | | |TimeZoneRule |4.3.3, |
| | | | 4.7.2 | | | | |Section |
| | | | | | | | |4.7.2 |
| recurrenceRul | RecurrenceRule[] | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| es | | JSTask, Ti | 4.3.2, | |rel |String |Link |Section |
| | | meZoneRule | Section | | | | |1.4.11 |
| | | | 4.7.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |relatedTo |String[Relation] |Event, Task, |Section |
| rel | String | Link | Section | | | |Alert |4.1.3, |
| | | | 1.4.11 | | | | |Section |
| | | | | | | | |4.5.2 |
| relatedTo | String[Relation] | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSTask, | 4.1.3, | |relation |String[Boolean] |Relation |Section |
| | | Alert | Section | | | | |1.4.10 |
| | | | 4.5.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |relativeTo |String |OffsetTrigger, |Section |
| relation | String[Boolean] | Relation | Section | | | |Location |4.5.2, |
| | | | 1.4.10 | | | | |Section |
| | | | | | | | |4.2.5 |
| relativeTo | String | OffsetTrig | Section | +--------------------+-----------------+----------------+-----------+
| | | ger, | 4.5.2, | |replyTo |String[String] |Event, Task |Section |
| | | Location | Section | | | | |4.4.4 |
| | | | 4.2.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |requestStatus |String |Event, Task |Section |
| replyTo | String[String] | JSEvent, | Section | | | | |4.4.7 |
| | | JSTask | 4.4.4 | +--------------------+-----------------+----------------+-----------+
| | | | | |roles |String[Boolean] |Participant |Section |
| roles | String[Boolean] | Participan | Section | | | | |4.4.6 |
| | | t | 4.4.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |rscale |String |RecurrenceRule |Section |
| rscale | String | Recurrence | Section | | | | |4.3.3 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |sentBy |String |Event, Task, |Section |
| standard | TimeZoneRule | TimeZone | Section | | | |Participant |4.4.5, |
| | | | 4.7.2 | | | | |Section |
| | | | | | | | |4.4.6 |
| start | LocalDateTime | TimeZoneRu | Section | +--------------------+-----------------+----------------+-----------+
| | | le | 4.7.2 | |standard |TimeZoneRule[] |TimeZone |Section |
| | | | | | | | |4.7.2 |
| scheduleAgent | String | Participan | Section | +--------------------+-----------------+----------------+-----------+
| | | t | 4.4.5 | |start |LocalDateTime |TimeZoneRule |Section |
| | | | | | | | |4.7.2 |
| scheduleForce | Boolean | Participan | Section | +--------------------+-----------------+----------------+-----------+
| Send | | t | 4.4.5 | |scheduleAgent |String |Participant |Section |
| | | | | | | | |4.4.6 |
| scheduleSeque | UnsignedInt | Participan | Section | +--------------------+-----------------+----------------+-----------+
| nce | | t | 4.4.5 | |scheduleForceSend |Boolean |Participant |Section |
| | | | | | | | |4.4.6 |
| scheduleStatu | String[] | Participan | Section | +--------------------+-----------------+----------------+-----------+
| s | | t | 4.4.5 | |scheduleSequence |UnsignedInt |Participant |Section |
| | | | | | | | |4.4.6 |
| scheduleUpdat | UTCDateTime | Participan | Section | +--------------------+-----------------+----------------+-----------+
| ed | | t | 4.4.5 | |scheduleStatus |String[] |Participant |Section |
| | | | | | | | |4.4.6 |
| sendTo | String[String] | Participan | Section | +--------------------+-----------------+----------------+-----------+
| | | t | 4.4.5 | |scheduleUpdated |UTCDateTime |Participant |Section |
| | | | | | | | |4.4.6 |
| sequence | UnsignedInt | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSTask | 4.1.7 | |sendTo |String[String] |Participant |Section |
| | | | | | | | |4.4.6 |
| showWithoutTi | Boolean | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| me | | JSTask | 4.2.4 | |sequence |UnsignedInt |Event, Task |Section |
| | | | | | | | |4.1.7 |
| size | UnsignedInt | Link | Section | +--------------------+-----------------+----------------+-----------+
| | | | 1.4.11 | |showWithoutTime |Boolean |Event, Task |Section |
| | | | | | | | |4.2.4 |
| skip | String | Recurrence | Section | +--------------------+-----------------+----------------+-----------+
| | | Rule | 4.3.2 | |size |UnsignedInt |Link |Section |
| | | | | | | | |1.4.11 |
| source | String | JSGroup | Section | +--------------------+-----------------+----------------+-----------+
| | | | 5.3.2 | |skip |String |RecurrenceRule |Section |
| | | | | | | | |4.3.3 |
| start | LocalDateTime | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSTask | 5.1.1, | |source |String |Group |Section |
| | | | Section | | | | |5.3.2 |
| | | | 5.2.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |start |LocalDateTime |Event, Task |Section |
| status | String | JSEvent | Section | | | | |5.1.1, |
| | | | 5.1.3 | | | | |Section |
| | | | | | | | |5.2.2 |
| timeZone | TimeZoneId|null | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSTask, | 4.7.1, | |status |String |Event |Section |
| | | Location | Section | | | | |5.1.3 |
| | | | 4.2.5 | +--------------------+-----------------+----------------+-----------+
| | | | | |timeZone |TimeZoneId|null |Event, Task, |Section |
| timeZones | TimeZoneId[TimeZone] | JSEvent, | Section | | | |Location |4.7.1, |
| | | JSTask | 4.7.2 | | | | |Section |
| | | | | | | | |4.2.5 |
| title | String | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| | | JSTask, | 4.2.1 | |timeZones |TimeZoneId |Event, Task |Section |
| | | JSGroup, | | | |[TimeZone] | |4.7.2 |
| | | Link | | +--------------------+-----------------+----------------+-----------+
| | | | | |title |String |Event, Task, |Section |
| trigger | OffsetTrigger|AbsoluteTrig | Alert | Section | | | |Group, Link |4.2.1 |
| | ger|UnknownTrigger | | 4.5.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |trigger |OffsetTrigger| |Alert |Section |
| tzId | String | TimeZone | Section | | |AbsoluteTrigger| | |4.5.2 |
| | | | 4.7.2 | | |UnknownTrigger | | |
| | | | | +--------------------+-----------------+----------------+-----------+
| uid | String | JSEvent, | Section | |tzId |String |TimeZone |Section |
| | | JSTask, | 4.1.2 | | | | |4.7.2 |
| | | JSGroup | | +--------------------+-----------------+----------------+-----------+
| | | | | |uid |String |Event, Task, |Section |
| until | LocalDateTime | Recurrence | Section | | | |Group |4.1.2 |
| | | Rule | 4.3.2 | +--------------------+-----------------+----------------+-----------+
| | | | | |until |LocalDateTime |RecurrenceRule |Section |
| updated | UTCDateTime | JSEvent, | Section | | | | |4.3.3 |
| | | JSTask, | 4.1.6 | +--------------------+-----------------+----------------+-----------+
| | | JSGroup | | |updated |UTCDateTime |Event, Task, |Section |
| | | | | | | |Group |4.1.6 |
| uri | String | VirtualLoc | Section | +--------------------+-----------------+----------------+-----------+
| | | ation | 4.2.6 | |uri |String |VirtualLocation |Section |
| | | | | | | | |4.2.6 |
| url | String | TimeZone | Section | +--------------------+-----------------+----------------+-----------+
| | | | 4.7.2 | |url |String |TimeZone |Section |
| | | | | | | | |4.7.2 |
| useDefaultAle | Boolean | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| rts | | JSTask | 4.5.1 | |useDefaultAlerts |Boolean |Event, Task |Section |
| | | | | | | | |4.5.1 |
| validUntil | UTCDateTime | TimeZone | Section | +--------------------+-----------------+----------------+-----------+
| | | | 4.7.2 | |validUntil |UTCDateTime |TimeZone |Section |
| | | | | | | | |4.7.2 |
| virtualLocati | Id[VirtualLocation] | JSEvent, | Section | +--------------------+-----------------+----------------+-----------+
| ons | | JSTask | 4.2.6 | |virtualLocations |Id |Event, Task |Section |
| | | | | | |[VirtualLocation]| |4.2.6 |
| when | UTCDateTime | AbsoluteTr | Section | +--------------------+-----------------+----------------+-----------+
| | | igger | 4.5.2 | |when |UTCDateTime |AbsoluteTrigger |Section |
+---------------+----------------------------+------------+---------+ | | | |4.5.2 |
+--------------------+-----------------+----------------+-----------+
Table 1 Table 1: Initial Contents of the "JSCalendar Properties" Registry
8.3. Creation of "JSCalendar Types" Registry 8.3. Creation of the "JSCalendar Types" Registry
The IANA will create the "JSCalendar Types" registry to avoid name IANA has created the "JSCalendar Types" registry to avoid name
collisions and provide a complete reference for all data types used collisions and provide a complete reference for all data types used
for JSCalendar property values. The registration process is the same for JSCalendar property values. The registration process is the same
as for the JSCalendar Properties registry, as defined in Section 8.2. as for the "JSCalendar Properties" registry, as defined in
Section 8.2.
8.3.1. JSCalendar Types Registry Template 8.3.1. "JSCalendar Types" Registry Template
o Type Name: The name of the type. Type Name: the name of the type
o Reference or Description: A brief description or RFC number and Reference or Description: a brief description or RFC number and
section reference where the Type is specified (may be omitted for section reference where the Type is specified (may be omitted for
"reserved" type names). "reserved" type names)
o Intended Use: Common, reserved, or obsolete. Intended Use: common, reserved, or obsolete
o Change Controller: Who may request a change to this entry's Change Controller: who may request a change to this entry's
definition ("IETF" for IETF-stream RFCs). definition ("IETF" for RFCs from the IETF stream)
8.3.2. Initial Contents for the JSCalendar Types Registry 8.3.2. Initial Contents for the "JSCalendar Types" Registry
The following table lists the initial entries of the JSCalendar Types The following table lists the initial entries of the JSCalendar Types
registry. All properties are for common-use. All RFC section registry. All properties are for common use. All RFC section
references are for this document. The change controller for all references are for this document. The change controller for all
these properties is "IETF". these properties is "IETF".
+-----------------+--------------------------+ +=================+==========================+
| Type Name | Reference or Description | | Type Name | Reference or Description |
+-----------------+--------------------------+ +=================+==========================+
| Alert | Section 4.5.2 | | Alert | Section 4.5.2 |
| | | +-----------------+--------------------------+
| Boolean | Section 1.3 | | Boolean | Section 1.3 |
| | | +-----------------+--------------------------+
| Duration | Section 1.4.6 | | Duration | Section 1.4.6 |
| | | +-----------------+--------------------------+
| Id | Section 1.4.1 | | Id | Section 1.4.1 |
| | | +-----------------+--------------------------+
| Int | Section 1.4.2 | | Int | Section 1.4.2 |
| | | +-----------------+--------------------------+
| LocalDateTime | Section 1.4.5 | | LocalDateTime | Section 1.4.5 |
| | | +-----------------+--------------------------+
| Link | Section 1.4.11 | | Link | Section 1.4.11 |
| | | +-----------------+--------------------------+
| Location | Section 4.2.5 | | Location | Section 4.2.5 |
| | | +-----------------+--------------------------+
| NDay | Section 4.3.2 | | NDay | Section 4.3.3 |
| | | +-----------------+--------------------------+
| Number | Section 1.3 | | Number | Section 1.3 |
| | | +-----------------+--------------------------+
| Participant | Section 4.4.5 | | Participant | Section 4.4.6 |
| | | +-----------------+--------------------------+
| PatchObject | Section 1.4.9 | | PatchObject | Section 1.4.9 |
| | | +-----------------+--------------------------+
| RecurrenceRule | Section 4.3.2 | | RecurrenceRule | Section 4.3.3 |
| | | +-----------------+--------------------------+
| Relation | Section 1.4.10 | | Relation | Section 1.4.10 |
| | | +-----------------+--------------------------+
| SignedDuration | Section 1.4.7 | | SignedDuration | Section 1.4.7 |
| | | +-----------------+--------------------------+
| String | Section 1.3 | | String | Section 1.3 |
| | | +-----------------+--------------------------+
| TimeZone | Section 4.7.2 | | TimeZone | Section 4.7.2 |
| | | +-----------------+--------------------------+
| TimeZoneId | Section 1.4.8 | | TimeZoneId | Section 1.4.8 |
| | | +-----------------+--------------------------+
| TimeZoneRule | Section 4.7.2 | | TimeZoneRule | Section 4.7.2 |
| | | +-----------------+--------------------------+
| UnsignedInt | Section 1.4.3 | | UnsignedInt | Section 1.4.3 |
| | | +-----------------+--------------------------+
| UTCDateTime | Section 1.4.4 | | UTCDateTime | Section 1.4.4 |
| | | +-----------------+--------------------------+
| VirtualLocation | Section 4.2.6 | | VirtualLocation | Section 4.2.6 |
+-----------------+--------------------------+ +-----------------+--------------------------+
Table 2 Table 2: Initial Contents of the
"JSCalendar Types" Registry
8.4. Creation of "JSCalendar Enum Values" Registry 8.4. Creation of the "JSCalendar Enum Values" Registry
The IANA will create the "JSCalendar Enum Values" registry to allow IANA has created the "JSCalendar Enum Values" registry to allow
interoperable extension of semantics for properties with enumerable interoperable extension of semantics for properties with enumerable
values. Each such property will have a subregistry of allowed values. Each such property will have a subregistry of allowed
values. The registration process for a new enum value or adding a values. The registration process for a new enum value or adding a
new enumerable property is the same as for the JSCalendar Properties new enumerable property is the same as for the "JSCalendar
registry, as defined in Section 8.2. Properties" registry, as defined in Section 8.2.
8.4.1. JSCalendar Enum Property Template 8.4.1. "JSCalendar Enum Values" Registry Property Template
This template is for adding a subregistry for a new enumerable This template is for adding a subregistry for a new enumerable
property to the JSCalendar Enum registry. property to the "JSCalendar Enum" registry.
o Property Name: the name(s) of the property or properties where Property Name: These are the name(s) of the property or properties
these values may be used. This MUST be registered in the where these values may be used. This MUST be registered in the
JSCalendar Properties registry. "JSCalendar Properties" registry.
o Context: the list of allowed object types where the property or Context: This is the list of allowed object types where the property
properties may appear, as registered in the JSCalendar Properties or properties may appear, as registered in the "JSCalendar
registry. This disambiguates where there may be two distinct Properties" registry. This disambiguates where there may be two
properties with the same name in different contexts. distinct properties with the same name in different contexts.
o Change Controller: ("IETF" for properties defined in IETF-stream Change Controller: ("IETF" for properties defined in RFCs from the
RFCs). IETF stream).
o Initial Contents: The initial list of defined values for this Initial Contents: This is the initial list of defined values for
enum, using the template defined in Section 8.4.2. A subregistry this enum, using the template defined in Section 8.4.2. A
will be created with these values for this property name/context subregistry will be created with these values for this property
tuple. name/context tuple.
8.4.2. JSCalendar Enum Value Template 8.4.2. "JSCalendar Enum Values" Registry Value Template
This template is for adding a new enum value to a subregistry in the This template is for adding a new enum value to a subregistry in the
JSCalendar Enum registry. JSCalendar Enum registry.
o Enum Value: The verbatim value of the enum. Enum Value: the verbatim value of the enum
o Reference or Description: A brief description or RFC number and Reference or Description: a brief description or RFC number and
section reference for the semantics of this value. section reference for the semantics of this value
8.4.3. Initial Contents for the JSCalendar Enum Values registry 8.4.3. Initial Contents for the "JSCalendar Enum Values" Registry
For each subregistry created in this section, all RFC section For each subregistry created in this section, all RFC section
references are for this document. references are for this document.
------------------------------------------------------------ Property Name: action
Context: Alert
Property Name: action Change Controller: IETF
Context: Alert
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| display | Section 4.5.2 |
+------------+--------------------------+
| email | Section 4.5.2 |
+------------+--------------------------+
+------------+--------------------------+ Table 3: JSCalendar Enum Values for
| Enum Value | Reference or Description | action (Context: Alert)
+------------+--------------------------+
| display | Section 4.5.2 |
| | |
| email | Section 4.5.2 |
+------------+--------------------------+
Table 3
------------------------------------------------------------
Property Name: display
Context: Link
Change Controller: IETF
Property Name: display
Context: Link
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| badge | Section 1.4.11 |
+------------+--------------------------+
| graphic | Section 1.4.11 |
+------------+--------------------------+
| fullsize | Section 1.4.11 |
+------------+--------------------------+
| thumbnail | Section 1.4.11 |
+------------+--------------------------+
+------------+--------------------------+ Table 4: JSCalendar Enum Values for
| Enum Value | Reference or Description | display (Context: Link)
+------------+--------------------------+
| badge | Section 1.4.11 |
| | |
| graphic | Section 1.4.11 |
| | |
| fullsize | Section 1.4.11 |
| | |
| thumbnail | Section 1.4.11 |
+------------+--------------------------+
Table 4
------------------------------------------------------------
Property Name: freeBusyStatus
Context: JSEvent, JSTask
Change Controller: IETF
Property Name: features
Context: VirtualLocation
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| audio | Section 4.2.6 |
+------------+--------------------------+
| chat | Section 4.2.6 |
+------------+--------------------------+
| feed | Section 4.2.6 |
+------------+--------------------------+
| moderator | Section 4.2.6 |
+------------+--------------------------+
| phone | Section 4.2.6 |
+------------+--------------------------+
| screen | Section 4.2.6 |
+------------+--------------------------+
| video | Section 4.2.6 |
+------------+--------------------------+
+------------+--------------------------+ Table 5: JSCalendar Enum Values for
| Enum Value | Reference or Description | features (Context: VirtualLocation)
+------------+--------------------------+
| free | Section 4.4.2 |
| | |
| busy | Section 4.4.2 |
+------------+--------------------------+
Table 5
------------------------------------------------------------
Property Name: kind
Context: Participant
Change Controller: IETF
Property Name: freeBusyStatus
Context: Event, Task
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| free | Section 4.4.2 |
+------------+--------------------------+
| busy | Section 4.4.2 |
+------------+--------------------------+
+------------+--------------------------+ Table 6: JSCalendar Enum Values for
| Enum Value | Reference or Description | freeBusyStatus (Context: Event, Task)
+------------+--------------------------+
| individual | Section 4.4.5 |
| | |
| group | Section 4.4.5 |
| | |
| resource | Section 4.4.5 |
| | |
| location | Section 4.4.5 |
+------------+--------------------------+
Table 6
------------------------------------------------------------
Property Name: participationStatus
Context: Participant
Change Controller: IETF
Property Name: kind
Context: Participant
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| individual | Section 4.4.6 |
+------------+--------------------------+
| group | Section 4.4.6 |
+------------+--------------------------+
| resource | Section 4.4.6 |
+------------+--------------------------+
| location | Section 4.4.6 |
+------------+--------------------------+
+--------------+--------------------------+ Table 7: JSCalendar Enum Values for
| Enum Value | Reference or Description | kind (Context: Participant)
+--------------+--------------------------+
| needs-action | Section 4.4.5 |
| | |
| accepted | Section 4.4.5 |
| | |
| declined | Section 4.4.5 |
| | |
| tenative | Section 4.4.5 |
| | |
| delegated | Section 4.4.5 |
+--------------+--------------------------+
Table 7
------------------------------------------------------------
Property Name: privacy
Context: JSEvent, JSTask
Change Controller: IETF
Property Name: participationStatus
Context: Participant
Change Controller: IETF
Initial Contents: Initial Contents:
+==============+==========================+
| Enum Value | Reference or Description |
+==============+==========================+
| needs-action | Section 4.4.6 |
+--------------+--------------------------+
| accepted | Section 4.4.6 |
+--------------+--------------------------+
| declined | Section 4.4.6 |
+--------------+--------------------------+
| tentative | Section 4.4.6 |
+--------------+--------------------------+
| delegated | Section 4.4.6 |
+--------------+--------------------------+
+------------+--------------------------+ Table 8: JSCalendar Enum Values for
| Enum Value | Reference or Description | participationStatus (Context:
+------------+--------------------------+ Participant)
| public | Section 4.4.3 |
| | |
| private | Section 4.4.3 |
| | |
| secret | Section 4.4.3 |
+------------+--------------------------+
Table 8
------------------------------------------------------------
Property Name: progress
Context: JSTask, Participant
Change Controller: IETF
Property Name: privacy
Context: Event, Task
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| public | Section 4.4.3 |
+------------+--------------------------+
| private | Section 4.4.3 |
+------------+--------------------------+
| secret | Section 4.4.3 |
+------------+--------------------------+
+--------------+--------------------------+ Table 9: JSCalendar Enum Values for
| Enum Value | Reference or Description | privacy (Context: Event, Task)
+--------------+--------------------------+
| needs-action | Section 5.2.5 |
| | |
| in-process | Section 5.2.5 |
| | |
| completed | Section 5.2.5 |
| | |
| failed | Section 5.2.5 |
| | |
| cancelled | Section 5.2.5 |
+--------------+--------------------------+
Table 9
------------------------------------------------------------
Property Name: relation
Context: Relation
Change Controller: IETF
Property Name: progress
Context: Task, Participant
Change Controller: IETF
Initial Contents: Initial Contents:
+==============+==========================+
| Enum Value | Reference or Description |
+==============+==========================+
| needs-action | Section 5.2.5 |
+--------------+--------------------------+
| in-process | Section 5.2.5 |
+--------------+--------------------------+
| completed | Section 5.2.5 |
+--------------+--------------------------+
| failed | Section 5.2.5 |
+--------------+--------------------------+
| cancelled | Section 5.2.5 |
+--------------+--------------------------+
+------------+--------------------------+ Table 10: JSCalendar Enum Values for
| Enum Value | Reference or Description | progress (Context: Task, Participant)
+------------+--------------------------+
| first | Section 1.4.10 |
| | |
| next | Section 1.4.10 |
| | |
| child | Section 1.4.10 |
| | |
| parent | Section 1.4.10 |
+------------+--------------------------+
Table 10
------------------------------------------------------------
Property Name: relativeTo
Context: OffsetTrigger, Location
Change Controller: IETF Property Name: relation
Context: Relation
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| first | Section 1.4.10 |
+------------+--------------------------+
| next | Section 1.4.10 |
+------------+--------------------------+
| child | Section 1.4.10 |
+------------+--------------------------+
| parent | Section 1.4.10 |
+------------+--------------------------+
+------------+--------------------------+ Table 11: JSCalendar Enum Values for
| Enum Value | Reference or Description | relation (Context: Relation)
+------------+--------------------------+
| start | Section 4.5.2 |
| | |
| end | Section 4.5.2 |
+------------+--------------------------+
Table 11
------------------------------------------------------------
Property Name: roles
Context: Participant
Change Controller: IETF
Property Name: relativeTo
Context: OffsetTrigger, Location
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| start | Section 4.5.2 |
+------------+--------------------------+
| end | Section 4.5.2 |
+------------+--------------------------+
+---------------+--------------------------+ Table 12: JSCalendar Enum Values for
| Enum Value | Reference or Description | relativeTo (Context: OffsetTrigger,
+---------------+--------------------------+ Location)
| owner | Section 4.4.5 |
| | |
| attendee | Section 4.4.5 |
| | |
| optional | Section 4.4.5 |
| | |
| informational | Section 4.4.5 |
| | |
| chair | Section 4.4.5 |
| | |
| contact | Section 4.4.5 |
+---------------+--------------------------+
Table 12
------------------------------------------------------------
Property Name: scheduleAgent
Context: Participant
Change Controller: IETF Property Name: roles
Context: Participant
Change Controller: IETF
Initial Contents: Initial Contents:
+===============+==========================+
| Enum Value | Reference or Description |
+===============+==========================+
| owner | Section 4.4.6 |
+---------------+--------------------------+
| attendee | Section 4.4.6 |
+---------------+--------------------------+
| optional | Section 4.4.6 |
+---------------+--------------------------+
| informational | Section 4.4.6 |
+---------------+--------------------------+
| chair | Section 4.4.6 |
+---------------+--------------------------+
| contact | Section 4.4.6 |
+---------------+--------------------------+
+------------+--------------------------+ Table 13: JSCalendar Enum Values for
| Enum Value | Reference or Description | roles (Context: Participant)
+------------+--------------------------+
| server | Section 4.4.5 |
| | |
| client | Section 4.4.5 |
| | |
| none | Section 4.4.5 |
+------------+--------------------------+
Table 13
------------------------------------------------------------
Property Name: status
Context: JSEvent Property Name: scheduleAgent
Context: Participant
Change Controller: IETF
Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| server | Section 4.4.6 |
+------------+--------------------------+
| client | Section 4.4.6 |
+------------+--------------------------+
| none | Section 4.4.6 |
+------------+--------------------------+
Change Controller: IETF Table 14: JSCalendar Enum Values for
scheduleAgent (Context: Participant)
Property Name: status
Context: Event
Change Controller: IETF
Initial Contents: Initial Contents:
+============+==========================+
| Enum Value | Reference or Description |
+============+==========================+
| confirmed | Section 5.1.3 |
+------------+--------------------------+
| cancelled | Section 5.1.3 |
+------------+--------------------------+
| tentative | Section 5.1.3 |
+------------+--------------------------+
+------------+--------------------------+ Table 15: JSCalendar Enum Values for
| Enum Value | Reference or Description | status (Context: Event)
+------------+--------------------------+
| confirmed | Section 5.1.3 |
| | |
| cancelled | Section 5.1.3 |
| | |
| tentative | Section 5.1.3 |
+------------+--------------------------+
Table 14 9. References
9. Acknowledgments 9.1. Normative References
The authors would like to thank the members of CalConnect for their [BCP47] Phillips, A., Ed. and M. Davis, Ed., "Tags for Identifying
valuable contributions. This specification originated from the work Languages", BCP 47, RFC 5646, September 2009.
of the API technical committee of CalConnect, the Calendaring and
Scheduling Consortium.
10. References <https://www.rfc-editor.org/info/bcp47>
10.1. Normative References
[CLDR] "Unicode Common Locale Data Repository", [CLDR] "Unicode Common Locale Data Repository",
<http://cldr.unicode.org/>. <http://cldr.unicode.org/>.
[COLORS] "CSS Color Module", <https://www.w3.org/TR/css-color-3/>. [COLORS] Çelik, T., Lilley, C., and L. Baron, "CSS Color Module
Level 3", W3C Recommendation, June 2018,
<https://www.w3.org/TR/css-color-3/>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC2392] Levinson, E., "Content-ID and Message-ID Uniform Resource [RFC2392] Levinson, E., "Content-ID and Message-ID Uniform Resource
Locators", RFC 2392, DOI 10.17487/RFC2392, August 1998, Locators", RFC 2392, DOI 10.17487/RFC2392, August 1998,
<https://www.rfc-editor.org/info/rfc2392>. <https://www.rfc-editor.org/info/rfc2392>.
skipping to change at page 83, line 5 skipping to change at line 3854
[RFC4648] Josefsson, S., "The Base16, Base32, and Base64 Data [RFC4648] Josefsson, S., "The Base16, Base32, and Base64 Data
Encodings", RFC 4648, DOI 10.17487/RFC4648, October 2006, Encodings", RFC 4648, DOI 10.17487/RFC4648, October 2006,
<https://www.rfc-editor.org/info/rfc4648>. <https://www.rfc-editor.org/info/rfc4648>.
[RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax [RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", STD 68, RFC 5234, Specifications: ABNF", STD 68, RFC 5234,
DOI 10.17487/RFC5234, January 2008, DOI 10.17487/RFC5234, January 2008,
<https://www.rfc-editor.org/info/rfc5234>. <https://www.rfc-editor.org/info/rfc5234>.
[RFC5322] Resnick, P., Ed., "Internet Message Format", RFC 5322,
DOI 10.17487/RFC5322, October 2008,
<https://www.rfc-editor.org/info/rfc5322>.
[RFC5545] Desruisseaux, B., Ed., "Internet Calendaring and [RFC5545] Desruisseaux, B., Ed., "Internet Calendaring and
Scheduling Core Object Specification (iCalendar)", Scheduling Core Object Specification (iCalendar)",
RFC 5545, DOI 10.17487/RFC5545, September 2009, RFC 5545, DOI 10.17487/RFC5545, September 2009,
<https://www.rfc-editor.org/info/rfc5545>. <https://www.rfc-editor.org/info/rfc5545>.
[RFC5546] Daboo, C., Ed., "iCalendar Transport-Independent [RFC5546] Daboo, C., Ed., "iCalendar Transport-Independent
Interoperability Protocol (iTIP)", RFC 5546, Interoperability Protocol (iTIP)", RFC 5546,
DOI 10.17487/RFC5546, December 2009, DOI 10.17487/RFC5546, December 2009,
<https://www.rfc-editor.org/info/rfc5546>. <https://www.rfc-editor.org/info/rfc5546>.
[RFC5646] Phillips, A., Ed. and M. Davis, Ed., "Tags for Identifying
Languages", BCP 47, RFC 5646, DOI 10.17487/RFC5646,
September 2009, <https://www.rfc-editor.org/info/rfc5646>.
[RFC5870] Mayrhofer, A. and C. Spanring, "A Uniform Resource [RFC5870] Mayrhofer, A. and C. Spanring, "A Uniform Resource
Identifier for Geographic Locations ('geo' URI)", Identifier for Geographic Locations ('geo' URI)",
RFC 5870, DOI 10.17487/RFC5870, June 2010, RFC 5870, DOI 10.17487/RFC5870, June 2010,
<https://www.rfc-editor.org/info/rfc5870>. <https://www.rfc-editor.org/info/rfc5870>.
[RFC6047] Melnikov, A., Ed., "iCalendar Message-Based [RFC6047] Melnikov, A., Ed., "iCalendar Message-Based
Interoperability Protocol (iMIP)", RFC 6047, Interoperability Protocol (iMIP)", RFC 6047,
DOI 10.17487/RFC6047, December 2010, DOI 10.17487/RFC6047, December 2010,
<https://www.rfc-editor.org/info/rfc6047>. <https://www.rfc-editor.org/info/rfc6047>.
skipping to change at page 84, line 23 skipping to change at line 3920
[RFC8259] Bray, T., Ed., "The JavaScript Object Notation (JSON) Data [RFC8259] Bray, T., Ed., "The JavaScript Object Notation (JSON) Data
Interchange Format", STD 90, RFC 8259, Interchange Format", STD 90, RFC 8259,
DOI 10.17487/RFC8259, December 2017, DOI 10.17487/RFC8259, December 2017,
<https://www.rfc-editor.org/info/rfc8259>. <https://www.rfc-editor.org/info/rfc8259>.
[RFC8288] Nottingham, M., "Web Linking", RFC 8288, [RFC8288] Nottingham, M., "Web Linking", RFC 8288,
DOI 10.17487/RFC8288, October 2017, DOI 10.17487/RFC8288, October 2017,
<https://www.rfc-editor.org/info/rfc8288>. <https://www.rfc-editor.org/info/rfc8288>.
[TZDB] "IANA Time Zone Database", [TZDB] IANA, "Time Zone Database",
<https://www.iana.org/time-zones>. <https://www.iana.org/time-zones>.
10.2. Informative References 9.2. Informative References
[LINKRELS] [ISO.9070.1991]
"IANA Link Relation Types", ISO/IEC, "Information technology -- SGML support
<https://www.iana.org/assignments/link-relations/link- facilities -- Registration procedures for public text
relations.xhtml>. owner identifiers", ISO/IEC 9070:1991, Edition 2, April
1991, <https://www.iso.org/standard/16645.html>.
[LINKRELS] IANA, "Link Relations: Link Relation Types",
<https://www.iana.org/assignments/link-relations>.
[LOCATIONTYPES] [LOCATIONTYPES]
"IANA Location Types Registry", IANA, "Location Types Registry",
<https://www.iana.org/assignments/location-type-registry/ <https://www.iana.org/assignments/location-type-registry>.
location-type-registry.xhtml>.
[MEDIATYPES] [MEDIATYPES]
"IANA Media Types", <https://www.iana.org/assignments/ IANA, "Media Types",
media-types/media-types.xhtml>. <https://www.iana.org/assignments/media-types>.
[RFC6376] Crocker, D., Ed., Hansen, T., Ed., and M. Kucherawy, Ed., [RFC6376] Crocker, D., Ed., Hansen, T., Ed., and M. Kucherawy, Ed.,
"DomainKeys Identified Mail (DKIM) Signatures", STD 76, "DomainKeys Identified Mail (DKIM) Signatures", STD 76,
RFC 6376, DOI 10.17487/RFC6376, September 2011, RFC 6376, DOI 10.17487/RFC6376, September 2011,
<https://www.rfc-editor.org/info/rfc6376>. <https://www.rfc-editor.org/info/rfc6376>.
[RFC7265] Kewisch, P., Daboo, C., and M. Douglass, "jCal: The JSON [RFC7265] Kewisch, P., Daboo, C., and M. Douglass, "jCal: The JSON
Format for iCalendar", RFC 7265, DOI 10.17487/RFC7265, May Format for iCalendar", RFC 7265, DOI 10.17487/RFC7265, May
2014, <https://www.rfc-editor.org/info/rfc7265>. 2014, <https://www.rfc-editor.org/info/rfc7265>.
[RFC7986] Daboo, C., "New Properties for iCalendar", RFC 7986, [RFC7986] Daboo, C., "New Properties for iCalendar", RFC 7986,
DOI 10.17487/RFC7986, October 2016, DOI 10.17487/RFC7986, October 2016,
<https://www.rfc-editor.org/info/rfc7986>. <https://www.rfc-editor.org/info/rfc7986>.
Acknowledgments
The authors would like to thank the members of CalConnect for their
valuable contributions. This specification originated from the work
of the API technical committee of CalConnect: The Calendaring and
Scheduling Consortium.
Authors' Addresses Authors' Addresses
Neil Jenkins Neil Jenkins
Fastmail Fastmail
PO Box 234 Collins St. West
Collins St West P.O. Box 234
Melbourne VIC 8007 Melbourne VIC 8007
Australia Australia
Email: neilj@fastmailteam.com Email: neilj@fastmailteam.com
URI: https://www.fastmail.com URI: https://www.fastmail.com
Robert Stepanek Robert Stepanek
Fastmail Fastmail
PO Box 234 Collins St. West
Collins St West P.O. Box 234
Melbourne VIC 8007 Melbourne VIC 8007
Australia Australia
Email: rsto@fastmailteam.com Email: rsto@fastmailteam.com
URI: https://www.fastmail.com URI: https://www.fastmail.com
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