PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols

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Publisher: IETF
Doc Type: Standard
Pages: 40
Abstract: Application protocols using Unicode characters in protocol strings need to properly handle such strings in order to enforce internationalization rules for strings placed in various protocol slots (such as addresses and identifiers) and to perform valid comparison operations (e.g., for purposes of authentication or authorization). This document defines a framework enabling application protocols to perform the preparation, enforcement, and comparison of internationalized strings ("PRECIS") in a way that depends on the properties of Unicode characters and thus is agile with respect to versions of Unicode. As a result, this framework provides a more sustainable approach to the handling of internationalized strings than the previous framework, known as Stringprep (RFC 3454). This document obsoletes RFC 3454.
Publication Date: 2015-05-01
Status Note: Proposed Standard
DOI: 10.17487/RFC7564
Link: https://doi.org/10.17487/RFC7564
Author(s): Peter Saint-Andre
Marc Blanchet
Keyword(s): Internationalization, Stringprep

Latest version of IETF RFC 7564

Document Versions — IETF RFC 7564

▶ IETF RFC 7564 (2015-05-01)

THIS DOC [SUPERSEDED] [LATEST VERSION]

Superseded by:

RFC8264 NOT IN REGISTRY

Normative Reference(s)

The Unicode Consortium, "The Unicode Standard", < http://www.unicode.org/versions/latest/ >. EXTERNAL
IETF RFC 20 [Active*]
IETF RFC 2119 [Active*]
IETF RFC 5198 [Active*]
IETF RFC 6365 [Active*]
UNICODE.STD.7.0.0 — UNICODE EXTERNAL

Bibliographic Reference(s)

IETF.draft-ietf-precis-mappings-10 — PRECIS-Mappings EXTERNAL
IETF.draft-ietf-precis-nickname-17 — PRECIS-Nickname EXTERNAL
IETF.draft-ietf-precis-saslprepbis-17 — PRECIS-Users-Pwds EXTERNAL
IETF.draft-ietf-xmpp-6122bis-22 — XMPP-Addr-Format EXTERNAL
IETF.draft-klensin-idna-5892upd-unicode70-04 — IDNA-Unicode EXTERNAL
Unicode Technical Standard #39, "Unicode Security Mechanisms", edited by Mark Davis and Michel Suignard, < http://unicode.org/reports/tr39/ >. EXTERNAL
Unicode Technical Report #36, "Unicode Security Considerations", by Mark Davis and Michel Suignard, < http://unicode.org/reports/tr36/ >. EXTERNAL
Internet Architecture Board, "IAB Statement on Identifiers and Unicode 7.0.0", February 2015, < https://www.iab.org/ documents/correspondence-reports-documents/ 2015-2/iab-statement-on-identifiers-and-unicode-7-0-0/ >. EXTERNAL
Unicode Standard Annex #9, "Unicode Bidirectional Algorithm", edited by Mark Davis, Aharon Lanin, and Andrew Glass. An integral part of The Unicode Standard, < http://unicode.org/reports/tr9/ >. EXTERNAL
Unicode Standard Annex #11, "East Asian Width", edited by Ken Lunde. An integral part of The Unicode Standard, < http://unicode.org/reports/tr11/ >. EXTERNAL
The Unicode Consortium, "DerivedCoreProperties-7.0.0.txt", Unicode Character Database, February 2014, < http://www.unicode.org/Public/UCD/latest/ucd/ DerivedCoreProperties.txt >. EXTERNAL
Unicode Standard Annex #15, "Unicode Normalization Forms", edited by Mark Davis and Ken Whistler. An integral part of The Unicode Standard, < http://unicode.org/reports/tr15/ >. EXTERNAL
The Unicode Consortium, "PropertyAliases-7.0.0.txt", Unicode Character Database, November 2013, < http://www.unicode.org/Public/UCD/latest/ucd/ PropertyAliases.txt >. EXTERNAL
IETF RFC 2865 [Active*]
IETF RFC 3454 [Superseded*]
IETF RFC 3490 [Superseded*]
IETF RFC 3491 [Superseded*]
IETF RFC 3629 [Active*]
IETF RFC 4422 [Active*]
IETF RFC 4510 [Active*]
IETF RFC 4690 [Active*]
IETF RFC 5226 [Superseded*]
IETF RFC 5234 [Active, Amended*]
IETF RFC 5246 [Superseded*]
IETF RFC 5890 [Active*]
IETF RFC 5891 [Active*]
IETF RFC 5892 [Active*]
IETF RFC 5893 [Active*]
IETF RFC 5894 [Active*]
IETF RFC 5895 [Active*]
RFC6452 — RFC6452 EXTERNAL
IETF RFC 6885 [Active*]
IETF RFC 6943 [Active*]

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<span class="citation"><cite>IETF RFC 7564</cite>, PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols. Available at <a href="https://doi.org/10.17487/RFC7564" target="_blank" rel="noopener">https://doi.org/10.17487/RFC7564</a></span>

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IETF RFC 7564, PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols
doi: 10.17487/RFC7564
url: https://doi.org/10.17487/RFC7564

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<cite id="bib-rfc7564">IETF RFC 7564</cite>, PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols
<span class="doi">10.17487/RFC7564</span>
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Referenced By

IETF RFC 7613 [Superseded*]
IETF RFC 8126 [Active*]