rfc9290v6.txt		rfc9290.txt
	Internet Engineering Task Force (IETF) T. Fossati		Internet Engineering Task Force (IETF) T. Fossati
	Request for Comments: 9290 Arm Limited		Request for Comments: 9290 Arm Limited
	Category: Standards Track C. Bormann		Category: Standards Track C. Bormann
	ISSN: 2070-1721 Universität Bremen TZI		ISSN: 2070-1721 Universität Bremen TZI
	September 2022		October 2022
	Concise Problem Details for Constrained Application Protocol (CoAP) APIs		Concise Problem Details for Constrained Application Protocol (CoAP) APIs
	Abstract		Abstract
	This document defines a concise "problem detail" as a way to carry		This document defines a concise "problem detail" as a way to carry
	machine-readable details of errors in a Representational State		machine-readable details of errors in a Representational State
	Transfer (REST) response to avoid the need to define new error		Transfer (REST) response to avoid the need to define new error
	response formats for REST APIs for constrained environments. The		response formats for REST APIs for constrained environments. The
	format is inspired by, but intended to be more concise than, the		format is inspired by, but intended to be more concise than, the
	skipping to change at line 840 ¶		skipping to change at line 840 ¶
	RFC 2482 is Historic", RFC 6082, DOI 10.17487/RFC6082,		RFC 2482 is Historic", RFC 6082, DOI 10.17487/RFC6082,
	November 2010, <https://www.rfc-editor.org/info/rfc6082>.		November 2010, <https://www.rfc-editor.org/info/rfc6082>.
	[Unicode-14.0.0]		[Unicode-14.0.0]
	The Unicode Consortium, "The Unicode Standard, Version		The Unicode Consortium, "The Unicode Standard, Version
	14.0.0", Mountain View: The Unicode Consortium,		14.0.0", Mountain View: The Unicode Consortium,
	ISBN 978-1-936213-29-0, September 2021,		ISBN 978-1-936213-29-0, September 2021,
	<https://www.unicode.org/versions/Unicode14.0.0/>.		<https://www.unicode.org/versions/Unicode14.0.0/>.
	[Unicode-14.0.0-bidi]		[Unicode-14.0.0-bidi]
	The Unicode Consortium, "Unicode® Standard Annex #9 ---		The Unicode Consortium, "Unicode Standard Annex #9 ---
	Unicode Bidirectional Algorithm", 27 August 2021,		Unicode Bidirectional Algorithm", 27 August 2021,
	<https://www.unicode.org/reports/		<https://www.unicode.org/reports/
	tr9/#Markup_And_Formatting>.		tr9/#Markup_And_Formatting>.
	Appendix A. Language-Tagged Strings		Appendix A. Language-Tagged Strings
	This appendix serves as the archival documentation for CBOR tag 38, a		This appendix serves as the archival documentation for CBOR tag 38, a
	tag for serializing language-tagged text strings in CBOR. The text		tag for serializing language-tagged text strings in CBOR. The text
	of this appendix is adapted from the specification text supplied for		of this appendix is adapted from the specification text supplied for
	its initial registration. It has been extended to allow		its initial registration. It has been extended to allow
	skipping to change at line 971 ¶		skipping to change at line 971 ¶
	67 # text(7)		67 # text(7)
	426F6E6A6F7572 # "Bonjour"		426F6E6A6F7572 # "Bonjour"
	The following example uses right-to-left (RTL) script, which in the		The following example uses right-to-left (RTL) script, which in the
	context of this specification may be rendered differently by		context of this specification may be rendered differently by
	different document presentation environments. The descriptive text		different document presentation environments. The descriptive text
	may be more reliable to follow than the necessarily device- and		may be more reliable to follow than the necessarily device- and
	application-specific rendering. The example shows how the Hebrew-		application-specific rendering. The example shows how the Hebrew-
	language string		language string
	שלום		שלום
	is represented, where in direction of reading, the sequence of		is represented, where in direction of reading, the sequence of
	characters is: "ש" (HEBREW LETTER SHIN, U+05E9), "ל" (HEBREW LETTER		characters is: "ש" (HEBREW LETTER SHIN, U+05E9), "ל" (HEBREW LETTER
	LAMED, U+05DC), "ו" (HEBREW LETTER VAV, U+05D5), "ם" (HEBREW LETTER		LAMED, U+05DC), "ו" (HEBREW LETTER VAV, U+05D5), "ם" (HEBREW LETTER
	FINAL MEM, U+05DD). Note the rtl direction expressed by setting the		FINAL MEM, U+05DD). Note the rtl direction expressed by setting the
	third element in the array to "true".		third element in the array to "true".
	38(["he", "שלום", true])		38(["he", "שלום", true])
	D8 26 # tag(38)		D8 26 # tag(38)
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