Tech-invite3GPPspaceIETF RFCsSIP
in Index   Prev   Next

RFC 4729

A Uniform Resource Name (URN) Namespace for the Near Field Communication (NFC) Forum

Pages: 7

Top   ToC   RFC4729 - Page 1
Network Working Group                                            M. Abel
Request for Comments: 4729                                     NFC Forum
Category: Informational                                    November 2006

              A Uniform Resource Name (URN) Namespace for
               the Near Field Communication (NFC) Forum

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 IETF Trust (2006).


This document describes the Namespace Identifier (NID) for Uniform Resource Name (URN) resources published by the Near Field Communication (NFC) Forum. The NFC Forum defines and manages resources that utilize this URN identification model. Management activities for these and other resource types are provided by the NFC Forum Technical Committee.

Table of Contents

1. Introduction ....................................................2 2. URN Specification for "nfc" NID .................................2 3. Examples ........................................................5 4. Namespace Considerations ........................................5 5. Community Considerations ........................................5 6. Security Considerations .........................................6 7. IANA Considerations .............................................6 8. Informative References ..........................................6 Acknowledgments ....................................................6
Top   ToC   RFC4729 - Page 2

1. Introduction

The NFC Forum is a specification development body developing technologies related to near-field communications. This activity is supported by a membership comprised of chip vendors, smart card vendors, equipment vendors, software developers, finance and banking service providers, content providers, and other interested companies. Some of the technologies being developed by the NFC Forum need namespaces that are managed so that they are unique and persistent. To ensure that the uniqueness is absolute, the registration of a specific NID for use by the NFC Forum was deemed appropriate. Therefore, a full and complete registration will follow the namespace specification process as defined in [RFC3406].

2. URN Specification for "nfc" NID

Namespace ID: nfc Registration Information: Registration version number: 1 Registration date: 2006-05-17 Declared registrant of the namespace: Registering organization Name: Near Field Communication Forum, Inc. Address: 401 Edgewater Place, Suite 600 Wakefield, MA 01880 Designated contact Role: Technical Program Manager Email: Declaration of syntactic structure: The Namespace Specific String (NSS) of all URNs that use the "nfc" NID will have the following structure: urn:nfc:{NFCresource}:{ResourceSpecificString} Where the "{NFCresource}" is a US-ASCII string that conforms to the URN syntax requirements [RFC2141] and defines a specific class of resource. Each resource class has a specific labeling scheme
Top   ToC   RFC4729 - Page 3
      that is covered by "{ResourceSpecificString}" which also conforms
      to the naming requirements of [RFC2141].

      NFC Forum working groups will manage the assignment of NFC
      resources and the specific registration values assigned for each
      resource class.  The Technical Committee will coordinate creation
      of new resource class assignments based on community need.

   Relevant ancillary documentation:

      The NFC Forum publishes specifications describing the use of
      near-field communication for interoperable exchange of information
      between devices in close proximity.  Among these specifications
      are the designation of new data types, schema, XML elements and
      attributes, protocols, and other formally named items intended for
      machine parsing.  Interested parties are referred to the NFC Forum
      web site where these publications will be made available to the

   Identifier uniqueness considerations:

      The NFC Forum working groups and Technical Committee will ensure
      uniqueness of resource names assigned by the NFC Forum within the
      resource classes for which they are responsible.

      When authority and responsibility for assignment of names with a
      resource class are delegated to an external organization,
      commitment to adhere to the uniqueness requirements of the
      assigned resource names will be a pre-condition of such

      The structure of the NFC Forum namespace into resource classes
      will further ensure isolation of names in each class from names in
      other classes.

      It is anticipated that some resource classes may be open to self-
      assignment by any interested individual or organization.  To
      ensure a degree of uniqueness for these self-assigned resource
      names, fully-qualified domain names will be factored into the name
      to distinguish the naming authorities.

      It should be understood that due to the flexibility of the domain
      name system and the underlying market-based forces that allow for
      ownership transfer and abandonment of domain names, no guarantee
      of long-term uniqueness or persistence can be made for this class
Top   ToC   RFC4729 - Page 4
      of resource names beyond that made for the domain names

   Identifier persistence considerations:

      The NFC Forum will not reassign names and will thus guarantee the
      persistence of names beyond the expected lifetime of the named
      resource.  NFC Forum does not anticipate operating a name
      resolution service for the assigned names and does not anticipate
      any other usability issues of the assigned names beyond those for
      any other naturally aging technology.

   Process of identifier assignment:

      The NFC Forum will provide procedures for registration of each
      class of resource that it maintains.  Each such resource may have
      three types of registration activities:

      1) Registered names associated with NFC Forum specifications or
      2) Registration of names or resource classes for other entities;
      3) Name models for use in experimental purposes.

   Process for identifier resolution:

      The namespace is not listed with a Resolution Discovery System
      (RDS); this is not relevant.

   Rules for Lexical Equivalence:

      No special considerations; the rules for lexical equivalence of
      [RFC2141] apply.

   Conformance with URN Syntax:

      No special considerations.

   Validation mechanism:

      None specified.  URN assignment and registration will be handled
      by procedures implemented in support of NFC Forum activities.


Top   ToC   RFC4729 - Page 5

3. Examples

The following examples are representative URNs that could be assigned by the NFC Forum. They may not be the actual strings that would be assigned: urn:nfc:wkt:Uri Defines the well-known type identifier used to identify URI bookmark data objects defined by the NFC Forum and exchanged by NFC devices. urn:nfc:schema:manifest Declares an XML namespace for elements and attributes, used in an XML schema to describe an NFC Forum data transfer manifest.

4. Namespace Considerations

The NFC Forum is developing a variety of communication protocol and data exchange specifications. Some of these specifications depend upon supporting information (e.g., data descriptions, attributes, schema, etc.) to be fully specified. For proper operation, descriptions of the needed supporting information must exist and be available in a unique, reliable, and persistent manner. These dependencies provide the basis of need for namespaces, in one form or another. As type information is relayed across NFC Forum protocols, the need for compact, machine-parsed type identification of data and meta- content, with the attributes of uniqueness and reliability mentioned above, becomes imperative for proper interoperation across widely varied implementations. As the NFC Forum work is ongoing and covers many technical areas, the possibility of using various other namespace repositories has been deemed impractical. Each data object, description, or schema as defined in the NFC Forum could possibly be related to multiple different other namespaces, so further conflicts of association might occur. Thus, the intent is to utilize the requested URN namespace to manage NFC Forum-defined objects, descriptions, and schema.

5. Community Considerations

The objects and descriptions required for specifications produced and published by the NFC Forum are generally available for use by other organizations. The NFC Forum will provide access and support for name requests by these external organizations. This support can be enabled in a timely and responsive fashion as new objects and descriptions are produced.
Top   ToC   RFC4729 - Page 6

6. Security Considerations

There are no additional security considerations other than those normally associated with the use and resolution of URNs in general.

7. IANA Considerations

The requested NID (nfc) has been entered into the IANA registry for URN NIDs.

8. Informative References

[RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997. [RFC3406] Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom, "Uniform Resource Names (URN) Namespace Definition Mechanisms", BCP 66, RFC 3406, October 2002.


The author wishes to express thanks to Dwight Smith (Motorola) for his guidance on the URN registration process and for providing, by example, a registration that was worthy of emulation.

Author's Address

Miller Abel Technical Committee Delegate, NFC Forum Microsoft Corporation One Microsoft Way Redmond, WA 98052 EMail:
Top   ToC   RFC4729 - Page 7
Full Copyright Statement

   Copyright (C) The IETF Trust (2006).

   This document is subject to the rights, licenses and restrictions
   contained in BCP 78, and except as set forth therein, the authors
   retain all their rights.

   This document and the information contained herein are provided on an

Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be
   found in BCP 78 and BCP 79.

   Copies of IPR disclosures made to the IETF Secretariat and any
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at


   Funding for the RFC Editor function is currently provided by the
   Internet Society.