Network Working Group A. Monrad
Request for Comments: 5279 S. Loreto
Category: Informational Ericsson
July 2008
A Uniform Resource Name (URN) Namespace
for the 3rd Generation Partnership Project (3GPP)
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.
Abstract
This document describes the Namespace Identifier (NID) for Uniform
Resource Namespace (URN) resources published by the 3rd Generation
Partnership Project (3GPP). 3GPP defines and manages resources that
utilize this URN name model. Management activities for these and
other resource types are provided by the 3GPP Support Team.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. URN Specification for the 3GPP Namespace Identifier (NID) . . . 2
3. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Namespace Considerations . . . . . . . . . . . . . . . . . . . 5
5. Community Considerations . . . . . . . . . . . . . . . . . . . 5
6. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
8. Normative References . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
3GPP is a cooperation of international telecommunication standards
bodies developing technologies for cellular networks. This activity
is supported by a membership composed of network operators, equipment
vendors, content providers, and other suppliers to the mobile market.
Some of the technologies being developed by 3GPP need URN namespaces
that are managed so that they are unique and persistent. To assure
that the uniqueness is absolute, the registration of a specific NID
for use by 3GPP was deemed appropriate. Therefore, a full and
complete registration will follow the namespace specification process
as defined in RFC 3406 [RFC3406].
2. URN Specification for the 3GPP Namespace Identifier (NID)
Namespace ID:
3gpp
Registration Information:
registration version number: 1
registration date: 2007-11-16
Declared registrant of the namespace:
Registering organization
Name: 3rd Generation Partnership Project
Address: ETSI
Mobile Competence Centre
650, route des Luciole
06921 Sophia-Antipolis Cedex
France
Designated contact
Role: Specifications Manager
Email: john.meredith@etsi.org
Declaration of syntactic structure:
All URNs that use the "3gpp" NID will have the following
structure:
urn:3gpp:{3gpp-urn}
where the "3gpp-urn" is a US-ASCII string that conforms to the
NSS(Namespace Specific String) Syntax described in RFC 2141
[RFC2141] and defines a specific resource.
EID 1516 (Verified) is as follows:
Section: 2, pg.2/3
Original Text:
Declaration of syntactic structure:
| The Namespace Specific String (NSS) of all URNs that use the
| "3gpp" NID will have the following structure:
urn:3gpp:{3gpp-urn}
where the "3gpp-urn" is a US-ASCII string that conforms to the
NSS(Namespace Specific String) Syntax described in RFC 2141
| [RFC2141] and defines a specific resource type.
Corrected Text:
Declaration of syntactic structure:
| All URNs that use the "3gpp" NID will have the following
| structure:
urn:3gpp:{3gpp-urn}
where the "3gpp-urn" is a US-ASCII string that conforms to the
NSS(Namespace Specific String) Syntax described in RFC 2141
| [RFC2141] and defines a specific resource.
Notes:
a) Obviously, the original clause contradicts itself.
It is impossible that the NSS is a proper subpart of itself
as would be required by the text and the syntax shown.
The corrected text resolves this partial issue, but not the
next two issues, which still remain open. Furthermore, for
logical consistency, "resource type" had to be replaced by
"resource" in the last line, to maintain the required
uniqueness property of '3gpp' URNs.
b) Even the corrected statement merely is a simple instantiation of
the general definition in RFC 2141 (Section 2, page 1), plus
giving an alias name (<3gpp-urn>) to the NSSs of '3gpp' URNs.
However, it does not cure the apparent underspecification:
The current URN Namespace registration template per BCP 66,
RFC3406, serves for "... providing a mechanism for disclosing
[the] structure of the URN namespace ..." (page 11 of RFC 3406),
but the quoted clause, as it stands, does *not*
"outline any structural features of identifiers in this namespace"
(p. 12 of RFC 3406).
Relevant ancillary documentation:
3GPP provides information on registration for each URN. More
information about 3GPP and the registration activities and
procedures to be followed are available at:
http://www.3gpp.org/tb/Other/URN/URN.htm
Identifier uniqueness considerations:
3GPP will manage resources using the "3gpp" NID and will be the
authority for managing the "3gpp-urn" strings. In the associated
procedures, 3GPP will ensure the uniqueness of the strings
themselves or shall permit secondary responsibility for management
of well-defined sub-trees.
3GPP may permit use of experimental type values that will not be
registered. As a consequence, multiple users may end up using the
same value for separate uses. Unregistered type values will only
be allowed in sub-namespaces clearly marked as experimental, to
help implementors avoid "leaking" experimental values into real
use.
Identifier persistence considerations:
3GPP will provide clear documentation of the registered uses of
the "3gpp" NID. This will be structured such that each "3gpp-
urn", if needed, will have a separate description and registration
table.
The registration tables and information will be published and
maintained by 3GPP on its web site.
Process of identifier assignment:
3GPP will provide procedures for registration of each type of
resource that it maintains. Each such resource may have three
types of registration activities:
1. Registered values associated with 3GPP specifications or
services
2. Registration of values or sub-trees to other entities
3. Name models for use in experimental purposes
New Namespace Identifier (NID) labels
The Entries in the registration table will be the following:
3gpp-urn: the registered value;
Description: description of the registered value;
Reference: 3GPP spec that defines the value;
Contact: person requesting the URN assignment.
Process for identifier resolution:
The namespace is not listed with a Resolution Discovery System
(RDS), as this is not relevant.
Rules for Lexical Equivalence:
No special considerations; the rules for lexical equivalence of
RFC 2141 [RFC2141] apply.
Conformance with URN Syntax:
No special considerations.
Validation mechanism:
None specified. URN assignment will be handled by procedures
supported and maintained by 3GPP.
Scope:
Global
3. Examples
The following examples are representative URNs that could be assigned
by 3GPP. They are not actual strings that are assigned.
urn:3gpp:featurephones
Defines the "3gpp-urn" to be used for "featurephones".
urn:3gpp:acme.foo-serv
Defines the URN associated with the operator identified by the
"3gpp-urn" value "acme", which has decided to register and provide
information about its service identified by value "foo-serv".
4. Namespace Considerations
The 3rd Generation Partnership Project is developing a variety of
enablers and applications. Some of these require information to be
fully specified.
For proper operation, descriptions of the needed information must
exist for the URNs and be available in a unique, reliable, and
persistent manner.
As 3GPP is ongoing and covers many technical areas, the possibility
of binding to various other namespace repositories has been deemed
impractical. Each object or description, as defined in 3GPP, could
possibly be related to multiple different other namespaces, so
further conflicts of association could occur. Thus, the intent is to
utilize the 3GPP specifications manager as the naming authority for
3GPP-defined URNs and its descriptions.
5. Community Considerations
The objects and descriptions required for enablers produced by 3GPP
are generally available for use by other organizations. The 3rd
Generation Partnership Project Support Office will provide access and
support for name requests by these organizations. This support can
be enabled in a timely and responsive fashion as new objects and
descriptions are produced.
6. Security Considerations
There are no security considerations other than those normally
associated with the use and resolution of URNs in general.
7. IANA Considerations
This section registers a new URN NID with the registration provided
in Section 2.
"3gpp-urn" strings are identified by label managed by 3GPP. Thus,
creating a new label does not require any IANA action.
8. Normative References
[RFC3406] Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom,
"Uniform Resource Names (URN) Namespace Definition
Mechanisms", BCP 66, RFC 3406, October 2002.
[RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997.
Authors' Addresses
Atle Monrad
Ericsson
Televeien 1
Grimstad 4898
Norway
EMail: atle.monrad@ericsson.com
Salvatore Loreto
Ericsson
Hirsalantie 11
Jorvas 02420
Finland
EMail: Salvatore.Loreto@ericsson.com
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