rfc8866v13.txt   rfc8866.txt 
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A specification document that defines values for SDP <media>, A specification document that defines values for SDP <media>,
<proto>, <attribute-name>, <bwtype>, <nettype>, and <addrtype> <proto>, <attribute-name>, <bwtype>, <nettype>, and <addrtype>
parameters MUST include the following information: parameters MUST include the following information:
* Contact name * Contact name
* Contact email address * Contact email address
* Name being defined (as it will appear in SDP) * Name being defined (as it will appear in SDP)
* Type of name (<media>, <proto>, <bwtype>, <nettype>, or * Type of name (<media>, <proto>, <attribute-name>, <bwtype>,
<addrtype>) <nettype>, or <addrtype>)
* A description of the purpose of the defined name * A description of the purpose of the defined name
* A stable reference to the document containing this information and * A stable reference to the document containing this information and
the definition of the value. (This will typically be an RFC the definition of the value. (This will typically be an RFC
number.) number.)
The subsections below specify what other information (if any) must be The subsections below specify what other information (if any) must be
specified for particular parameters, and what other fields are to be specified for particular parameters, and what other fields are to be
included in the registry. included in the registry.
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serious problem.) serious problem.)
The format of the <attribute-name> registry is: The format of the <attribute-name> registry is:
+======+==========+=============+==============+===========+ +======+==========+=============+==============+===========+
| Type | SDP Name | Usage Level | Mux Category | Reference | | Type | SDP Name | Usage Level | Mux Category | Reference |
+======+==========+=============+==============+===========+ +======+==========+=============+==============+===========+
Table 4: Format of the <attribute-name> Registry Table 4: Format of the <attribute-name> Registry
For example, the attribute "lang", which is defined for both session For example, the attribute "a=lang:", which is defined for both
and media level, will be listed in the new registry as follows: session and media level, will be listed in the new registry as
follows:
+===========+======+==========+===========+========================+ +===========+==========+================+==============+===========+
| Type | SDP | Usage | Mux | Reference | | Type | SDP Name | Usage Level | Mux Category | Reference |
| | Name | Level | Category | | +===========+==========+================+==============+===========+
+===========+======+==========+===========+========================+ | attribute | lang | session, media | TRANSPORT | [RFC8866] |
| attribute | lang | session, | TRANSPORT | [RFC8866] [RFC8859] | | | | | | [RFC8859] |
| | | media | | | +-----------+----------+----------------+--------------+-----------+
+-----------+------+----------+-----------+------------------------+
Table 5: <attribute-name> Registry Example Table 5: <attribute-name> Registry Example
This one <attribute-name> registry combines all of the previous This one <attribute-name> registry combines all of the previous
usage-level-specific "att-field" registries, including updates made usage-level-specific "att-field" registries, including updates made
by [RFC8859]. IANA is requested to do the necessary reformatting. by [RFC8859]. IANA is requested to do the necessary reformatting.
Section 6 of this document replaces the initial set of attribute Section 6 of this document replaces the initial set of attribute
definitions made by [RFC4566]. IANA is requested to update the definitions made by [RFC4566]. IANA is requested to update the
registry accordingly. registry accordingly.
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Bill Fenner, Carsten Bormann, Eve Schooler, Flemming Andreasen, Bill Fenner, Carsten Bormann, Eve Schooler, Flemming Andreasen,
Gonzalo Camarillo, Jörg Ott, John Elwell, Jon Peterson, Jonathan Gonzalo Camarillo, Jörg Ott, John Elwell, Jon Peterson, Jonathan
Lennox, Jonathan Rosenberg, Keith Drage, Peter Parnes, Rob Lanphier, Lennox, Jonathan Rosenberg, Keith Drage, Peter Parnes, Rob Lanphier,
Ross Finlayson, Sean Olson, Spencer Dawkins, Steve Casner, Steve Ross Finlayson, Sean Olson, Spencer Dawkins, Steve Casner, Steve
Hanna, Van Jacobson. Hanna, Van Jacobson.
Authors' Addresses Authors' Addresses
Ali Begen Ali Begen
Networked Media Networked Media
Konya/
Turkey Turkey
Email: ali.begen@networked.media Email: ali.begen@networked.media
Paul Kyzivat Paul Kyzivat
United States of America United States of America
Email: pkyzivat@alum.mit.edu Email: pkyzivat@alum.mit.edu
Colin Perkins Colin Perkins
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