Network Working Group B. Hoehrmann Internet-Draft March 14, 2009 Intended status: Informational Expires: September 15, 2009 The i;id identity collation draft-hoehrmann-id-collation-00 Status of This Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on September 15, 2009. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Abstract This memo describes the "i;id" identity collation. Sequences of Unicode scalar values are compared code point by code point. It provides equality, substring, and ordering operations. Hoehrmann Expires September 15, 2009 [Page 1] Internet-Draft The i;id identity collation March 2009 1. Introduction The i;id collation operates on Unicode strings and treats any and all difference between two strings as significant. Ordering of different strings is determined by the Unicode scalar values of the characters. It produces usable results where further information is unavailable. In that it is suitable as default collation for many applications. The equality operation determines if two strings are identical. This makes the collation suitable for use with strings known to be in some canonical form. Similarily, applications that require strings to be in a canonical but otherwise arbitrary order may find this collation the most efficient as it requires no transformations. 2. Definition The i;id collation is the same as the i;octet collation except that it operates on sequences of Unicode scalar values rather than octets. 3. Security Considerations None beyond those in RFC 4790 [RFC4790]. 4. IANA Considerations The i;id collation should be added to the registry [RFC4790]. 5. Registration document i;id Unicode identity equality order substring RFC XXXX IETF bjoern@hoehrmann.de 6. References [RFC4790] Newman, C., Duerst, M., and A. Gulbrandsen, "Internet Application Protocol Collation Registry", RFC 4790, March 2007. Hoehrmann Expires September 15, 2009 [Page 2] Internet-Draft The i;id identity collation March 2009 Author's Address Bjoern Hoehrmann Mittelstrasse 50 39114 Magdeburg Germany EMail: mailto:bjoern@hoehrmann.de URI: http://bjoern.hoehrmann.de Hoehrmann Expires September 15, 2009 [Page 3]