RFC 3622 (rfc3622) - Page 2 of 7
A Uniform Resource Name (URN) Namespace for the Liberty Alliance Project
Alternative Format: Original Text Document
RFC 3622 The Liberty URN Namespace February 2004 2. Specification Template Namespace ID: "liberty" requested. Registration Information: Registration Version Number: 1 Registration Date: 2003-04-01 Declared registrant of the namespace: Liberty Alliance Project c/o IEEE-ISTO 445 Hoes Lane Piscataway, NJ 08855-1331, USA info@projectliberty.org Declaration of structure: The Namespace Specific Strings (NSS) of all URNs assigned by Liberty will conform to the syntax defined in section 2.2 of RFC 2141 [1]. In addition, all Liberty URN NSSs will consist of a left-to-right series of tokens delimited by colons. The left-to- right sequence of colon-delimited tokens corresponds to descending nodes in a tree. To the right of the lowest naming authority node there may be zero, one or more levels of hierarchical (although not in the RFC 2396 [2] sense of 'hierarchy') naming nodes terminating in a rightmost leaf node. See the section entitled "Identifier assignment" below for more on the semantics of NSSs. This syntax convention is captured in the following normative ABNF [4] rules for Liberty NSSs: Liberty-NSS = 1*(subStChar) 0*(":" 1*(subStChar)) subStChar = trans / "%" HEXDIG HEXDIG trans = ALPHA / DIGIT / other / reserved other = "(" / ")" / "+" / "," / "-" / "." / "=" / "@" / ";" / "$" / "_" / "!" / "*" / "'" reserved = "%" / "/" / "?" / "#" Mealling Informational
