A Uniform Resource Name (URN) Namespace for the Commission for the Management and Application of Geoscience Information (CGI)
RFC 5138

Document Type RFC - Informational (February 2008; No errata)
Was draft-sjdcox-cgi-urn (individual in gen area)
Author S.J.D. Cox 
Last updated 2015-10-14
Stream IETF
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IESG IESG state RFC 5138 (Informational)
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Responsible AD Lisa Dusseault
Send notices to leslie@thinkingcat.com
Network Working Group                                             S. Cox
Request for Comments: 5138                                         CSIRO
Category: Informational                                    February 2008

      A Uniform Resource Name (URN) Namespace for the Commission
   for the Management and Application of Geoscience Information (CGI)

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.


   This document describes a URN (Uniform Resource Name) namespace that
   is engineered by the Commission for the Management and Application of
   Geoscience Information (CGI) for naming (i) persistent resources
   published by the CGI and (ii) resources published by organizations
   that wish them to be used in the context of services conforming to
   protocols and agreements issued by CGI.  The formal Namespace
   Identifier (NID) is "cgi".

1.  Introduction

   CGI is a Commission of the International Union of Geological Sciences
   (IUGS) concerned with developing best practices in the management and
   application of geoscience information.  The active membership is
   primarily drawn from organizations with statutory responsibility for
   providing geoscience information to external users (e.g., Geologic
   Surveys).  An important focus of activity is the development of
   standards for networked data interchange to complement or supersede
   the traditional map product.

   A number of documents, definitions, and other artifacts, are required
   to support this.  CGI wishes to provide persistent,
   location-independent identifiers for these resources.  In addition,
   organizations that subscribe to the interchange standards proposed by
   CGI require external identifiers for data objects that are
   transferred.  CGI wishes to provide a scheme to enable data providers
   to uniquely identify data, which is consistent with the requirements
   of the interchange framework.

   Products and services that conform to CGI endorsed interchange
   specifications enable users to exchange and process geoscience
   information across networks, computing platforms, and products.
   Interoperability in such an environment is facilitated by the use of

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RFC 5138              A URN Namespace for the CGI          February 2008

   a system of identifiers that is global in scope.  CGI is the lead
   forum for statutory organizations that act as primary providers of
   technical data in this application domain.

   Motivated by these concerns, CGI would like to assign formal URNs to
   published resources in order to provide persistent,
   location-independent identifiers for them.  The process for
   registering a namespace identifier is documented in [RFC3406].

   The official IANA registry of URN namespaces is available online at:


2.  URN Specification for the "cgi" NID

   Namespace ID:


   Registration Information:

      Registration Version Number: 1
      Registration Date: 2007-10-04

   Declared registrant of the namespace:

      Commission for Geoscience Information (Secretariat)
      c/o British Geological Survey
      Kingsley Dunham Centre
      NG12 5GG
      U K
      Attn. Ian Jackson (ij@bgs.ac.uk)

   Declaration of syntactic structure:

      The Namespace Specific String (NSS) of all URNs that use the "cgi"
      NID has the following structure:


      where the "CGIResource" is a US-ASCII string that conforms to the
      URN syntax requirements [RFC2141] and defines a specific class of
      resource type.  Each resource type has a specific labeling scheme
      that is covered by "ResourceSpecificString", which also conforms
      to the naming requirements of [RFC2141].

Cox                          Informational                      [Page 2]
RFC 5138              A URN Namespace for the CGI          February 2008

      The CGI maintains a naming authority, the CGI Naming Authority
      (CGINA), that manages the assignment of CGIResource classes and
      the specific registration values assigned for each resource class.

   Relevant ancillary documentation:

      The CGI Naming Authority (CGINA) provides information on the
      registered resources and the registrations for each.  More
      information about CGINA and the registration activities and
      procedures to be followed are available at:


      A URN resolver is available at:


      The resolver provides a registry of CGI URNs used in CGI services.

   Identifier uniqueness considerations:

      The CGINA manages resources using the "cgi" NID and is the
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