Network Working Group K. Best Internet-Draft OASIS, Inc. Expires: June 18, 2001 N. Walsh Sun Microsystems, Inc. December 18, 2000 A URN Namespace for XML.org xmlorg draft-best-xmlorg-00.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. 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 June 18, 2001. Copyright Notice Copyright (C) The Internet Society (2000). All Rights Reserved. Abstract This document describes a URN namespace that is engineered by the Organization for the Advancement of Structured Information Standards (OASIS) for naming persistent resources stored in the XML.org repository (such as XML Document Type Definitions, XML Schemas, Namespaces, Stylesheets, and other documents). 1. Introduction The XML.org Registry is provided by XML.org as a public service where XML schemas, DTDs, stylesheets, and other documents can be shared. Documents are submitted to a repository then retrieved by Best & Walsh Expires June 18, 2001 [Page 1] Internet-Draft A URN Namespace for XML.org December 2000 others who may want to use them. These documents require unique identifiers. Motivated by these observations, XML.org would like to assign URNs to some resources in order to retain unique, permanent location-independent names for them. This namespace specification is for a formal namespace. 2. Specification Template Namespace ID: "xmlorg" requested. Registration Information: Registration Version Number: 1 Registration Date: 2000-12-18 Declared registrant of the namespace: OASIS Karl Best Declaration of structure: The Namespace Specific String (NSS) of all URNs assigned by XML.org will have the following hierarchical structure: There is one branch at the top of the hierarchy: "objects". The Objects Hierarchy The general structure of the NSS in the names hierarchy has the form: urn:xmlorg:objects:{type}{:subtype}?:{object-id} where "type" identifies the document type (document, schema, stylesheet, entity, xmlns, etc.), the optional "subtype" provides additional information about the document type (for example, stylesheet or schema language), and "object-id" is a unique identifier for the document. The Director of Technical Operations at OASIS assigns document types, subtypes, and all unique identifiers. Relevant ancillary documentation: Best & Walsh Expires June 18, 2001 [Page 2] None Identifier uniqueness considerations: Identifier uniqueness will be enforced by the Director of Technical Operations who assigns unique identifiers to all documents identified by URN. Identifier persistence considerations: OASIS is committed to maintaining the accessability and persistence of all the resources that are assigned URNs. Process of identifier assignment: Assignment is limited to the owner and those authorities that are specifically designated by the owner. OASIS may assign portions of its namespace for assignment by other parties. Process of identifier resolution: The owner will distribute catalogs (OASIS TR9401 Catalogs) that map the assigned URNs to resource identifiers (e.g., URLs). In addition, the owner may provide an online resolution service based on RFC2483. The owner will authorize additional resolution services as appropriate. Rules for Lexical Equivalence: URNs are lexically equivalent if they are lexically identical. Conformance with URN Syntax: No special considerations. Validation mechanism: None specified. The owner will publish OASIS TR9401 Catalogs. The presence of a URN in a catalog indicates that it is valid. Scope: Global 3. Examples The following examples are not guaranteed to be real. They are listed for pedagogical reasons only. Best & Walsh Expires June 18, 2001 [Page 3] Internet-Draft A URN Namespace for XML.org December 2000 urn:xmlorg:objects:schema:xmlschema:xcatalog urn:xmlorg:objects:dtd:xml:docbook:v4.1.2 4. Security Considerations There are no additional security considerations other than those normally associated with the use and resolution of URNs in general. References [1] Goldfarb, C. F., "ISO (International Organization for Standardization) ISO 8879:1986(E) Information Processing -- Text and Office Systems -- Standard Generalized Markup Language (SGML)", 1986. [2] W3C, XML WG, "Extensible Markup Language (XML) 1.0", February 1998, . [3] W3C, Namespaces WG, "Namespaces in XML", January 1999, . [4] OASIS, Entity Mgmt. TC, "Entity Management: OASIS Technical Resolution 9401:1997 (Amendment 2 to TR 9401)", January 1994, . [5] Moats, R., "URN Syntax", RFC 2141, May 1997. [6] Mealling, M. and R. Daniel, "URI Resolution Services Necessary for URN Resolution", RFC 2483, January 1999. Authors' Addresses Karl Best OASIS, Inc. P.O. Box 455 Billerica, MA 01821 US EMail: karl.best@oasis-open.org Best & Walsh Expires June 18, 2001 [Page 4] Internet-Draft A URN Namespace for XML.org December 2000 Norman Walsh Sun Microsystems, Inc. One Network Drive MS UBUR02-201 Burlington, MA 01803-0902 US EMail: Norman.Walsh@East.Sun.COM Best & Walsh Expires June 18, 2001 [Page 5] Internet-Draft A URN Namespace for XML.org December 2000 Full Copyright Statement Copyright (C) The Internet Society (2000). All Rights Reserved. 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