ftp.cc.uoc.gr
rfc3061
This is a purely informative rendering of an RFC that includes verified errata. This rendering may not be used as a reference.

The following 'Verified' errata have been incorporated in this document: EID 1751
Network Working Group                                        M. Mealling
Request for Comments: 3061                                      Verisign
Category: Informational                                    February 2001
Obsoletes: 3001


                 A URN Namespace of Object Identifiers

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2001).  All Rights Reserved.

Abstract

   This document describes a Uniform Resource Name (URN) namespace that
   contains Object Identifiers (OIDs).  It obsoletes RFC 3001.

1. Introduction

   An Object Identifier is a tree of nodes where each node is simply a
   sequence of digits.  The rules roughly state that once an entity is
   assigned a node in the Object Identifier (OID) tree, it has sole
   discretion to further subdelegate sub-trees off of that node. Some
   examples of OIDs include:

   o  1.3.6.1 - the Internet OID
   o  1.3.6.1.4.1 - IANA-assigned company OIDs, used for private MIBs
      and such things
   o  1.3.6.1.2.1.27 - The Applications MIB
      o  0.9.2342.19200300.100.4 - Object ID's used in the directory pilot 
      project to identify X.500 Object Classes.  Mostly defined in RFC
      1274.  RFC 1274 is now obsolete.  The usage description of these 
      identifiers now appears in RFC 4524 and the relevant registry is 
      defined in RFC 4520.

   This document specifies the "oid" URN namespace [2].  This namespace
   is for encoding an Object Identifier as specified in ASN.1 [3] as a
   URI.  RFC 3001 [1] is obsoleted by this specification.

   The namespace specification is for a formal namespace.

   A complete database of OIDs appears at http://www.oid-info.com/
EID 1751 (Verified) is as follows:

Section: 1

Original Text:

   o  0.9.2342.19200300.100.4 - Object ID's used in the directory pilot
      project to identify X.500 Object Classes.  Mostly defined in RFC
      1274.

   This document specifies the "oid" URN namespace [2].  This namespace
   is for encoding an Object Identifier as specified in ASN.1 [3] as a
   URI.  RFC 3001 [1] is obsoleted by this specification.

   The namespace specification is for a formal namespace.

Corrected Text:

   o  0.9.2342.19200300.100.4 - Object ID's used in the directory pilot
      project to identify X.500 Object Classes.  Mostly defined in RFC
      1274.  RFC 1274 is now obsolete.  The usage description of these 
      identifiers now appears in RFC 4524 and the relevant registry is 
      defined in RFC 4520.

   This document specifies the "oid" URN namespace [2].  This namespace
   is for encoding an Object Identifier as specified in ASN.1 [3] as a
   URI.  RFC 3001 [1] is obsoleted by this specification.

   The namespace specification is for a formal namespace.

   A complete database of OIDs appears at http://www.oid-info.com/
Notes:
This suggested change is not substantive and makes no change to the spec itself. Instead, it supplies some additional, up-to-date, information that might be helpful to the reader and is intended to act as a placeholder to record that information for any future revision or update to 3061.

Note to RFC Editor: the source for this document is listed as "legacy", perhaps because it was published as Informational. However, it is the definition source for a Formal URN Namespace and those namespaces require IETF consensus action (see http://www.iana.org/assignments/urn-namespaces/urn-namespaces.xhtml), so the erratum should probably be processed as if it were a standards-track document.
2. Specification Template Namespace ID: "oid" requested. Registration Information: Registration Version Number: 1 Registration Date: 2000-04-30 Declared registrant of the namespace: The ISO/IEC Joint Technical Committee 1 - SubCommittee 6 The real authority is the ASN.1 specification itself but SC6 is the committee that has the authority to interpret what that means, thus that committee is listed as the registrant. Declaration of structure: The NSS portion of the identifier is based on the string encoding rules found in RFC 1778 Section 2.15 [4] which specifies a series of digits separated by a period with the most significant digit being at the left and the least significant being at the right. At no time shall the NSS portion of the URN contain the human readable description of a particular node in the OID tree. The NSS portion of the name is strictly limited to the digits 0-9 and the '.' character with no leading zeros. No other characters are permitted. This is all expressed in the following ABNF: oid = number *( DOT number ) number = DIGIT / ( LEADDIGIT 1*DIGIT ) LEADDIGIT = %x31-39 ; 1-9 DIGIT = %x30 / LEADDIGIT ; 0-9 DOT = %x2E ; period No changes are anticipated since Object Identifiers are fairly simple and have been standardized with no changes for many years. Relevant ancillary documentation: Relevant documentation can be found in X.660/Amd 2 | ISO/IEC 9834-1/Amd 2[3]. Identifier uniqueness considerations: The rules for assignment of OIDs requires that each OID be unique to the OID space and that it cannot be reassigned or reused. By reference this URN namespace inherents those rules. Identifier persistence considerations: The rules concerning the use of OIDs requires that they not be reused once assigned. By reference this URN namespace inherents those rules. Process of identifier assignment: Once an OID is assigned to some entity, that entity can then create and assign new OIDs below that particular OID. There are multiple entities that assign new OIDs to the general public. The top three levels are pre-assigned as follows: 0 - ITU-T assigned 1 - ISO assigned 2 - Joint ISO/ITU-T assignment several assigned OIDs that are of importance to the Internet are: 1.3.6.1 - the Internet OID 1.3.6.1.4.1 - IANA-assigned company OIDs, used for private MIBs and such things Process of identifier resolution: At this time no resolution mechanism is defined. Rules for Lexical Equivalence: OIDs are composed of multiple occurrences of digits and the "." character. Lexical equivalence is achieved by exact string match. Conformance with URN Syntax: There are no additional characters reserved. Validation mechanism: None. Scope: Global 3. Examples The following examples are taken from the example OIDs from the Introduction: urn:oid:1.3.6.1 urn:oid:1.3.6.1.4.1 urn:oid:1.3.6.1.2.1.27 URN:OID:0.9.2342.19200300.100.4 4. Security Considerations None not already inherent to using unverifiable OIDs. 5. Acknowledgements The author would like to thank Harald Alvestrand for the use of his OID database as a source for examples and references. References [1] Mealling, M., "A URN Namespace of Object Identifiers", RFC 3001, November 2000. [2] Moats, R., "URN Syntax", RFC 2141, May 1997. [3] CCITT, "Specification of Basic Encoding Rules for Abstract Syntax Notation One (ASN.1)", CCITT Recommendation X.209, January 1988. [4] Howes, T., Kille, S., Yeong, W. and C. Robbins, "The String Representation of Standard Attribute Syntaxes", RFC 1778, March 1995. Author's Address Michael Mealling Verisign 505 Huntmar Park Drive Herndon, VA 22070 US Phone: +1 770 935 5492 EMail: michaelm@netsol.com URI: http://www.netsol.com Full Copyright Statement Copyright (C) The Internet Society (2001). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society.