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Internet Engineering Task Force (IETF)                        E. CardonaRequest for Comments: 6289                              S. ChannabasappaCategory: Informational                                        J-F. MuleISSN: 2070-1721                                                CableLabs                                                               June 2011A Uniform Resource Name (URN) Namespace for CableLabsAbstract   This document describes the Namespace Identifier (NID) 'cablelabs'   for Uniform Resource Names (URNs) used to identify resources   published by Cable Television Laboratories, Inc. (CableLabs).   CableLabs specifies and manages resources that utilize this URN   identification model.  Management activities for these and other   resource types are handled by the manager of the CableLabs' Assigned   Names and Numbers registry.Status of This Memo   This document is not an Internet Standards Track specification; it is   published for informational purposes.   This document is a product of the Internet Engineering Task Force   (IETF).  It represents the consensus of the IETF community.  It has   received public review and has been approved for publication by the   Internet Engineering Steering Group (IESG).  Not all documents   approved by the IESG are a candidate for any level of Internet   Standard; seeSection 2 of RFC 5741.   Information about the current status of this document, any errata,   and how to provide feedback on it may be obtained athttp://www.rfc-editor.org/info/rfc6289.Copyright Notice   Copyright (c) 2011 IETF Trust and the persons identified as the   document authors.  All rights reserved.   This document is subject toBCP 78 and the IETF Trust's Legal   Provisions Relating to IETF Documents   (http://trustee.ietf.org/license-info) in effect on the date of   publication of this document.  Please review these documents   carefully, as they describe your rights and restrictions with respect   to this document.  Code Components extracted from this document mustCardona, et al.               Informational                     [Page 1]

RFC 6289               URN Namespace for CableLabs             June 2011   include Simplified BSD License text as described in Section 4.e of   the Trust Legal Provisions and are provided without warranty as   described in the Simplified BSD License.   This document may contain material from IETF Documents or IETF   Contributions published or made publicly available before November   10, 2008.  The person(s) controlling the copyright in some of this   material may not have granted the IETF Trust the right to allow   modifications of such material outside the IETF Standards Process.   Without obtaining an adequate license from the person(s) controlling   the copyright in such materials, this document may not be modified   outside the IETF Standards Process, and derivative works of it may   not be created outside the IETF Standards Process, except to format   it for publication as an RFC or to translate it into languages other   than English.Table of Contents1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .22.  URN Specification for CableLabs . . . . . . . . . . . . . . . .33.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . . .54.  Namespace Considerations  . . . . . . . . . . . . . . . . . . .55.  Community Considerations  . . . . . . . . . . . . . . . . . . .56.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . .57.  Security Considerations . . . . . . . . . . . . . . . . . . . .68.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . .69.  References  . . . . . . . . . . . . . . . . . . . . . . . . . .69.1.  Normative References  . . . . . . . . . . . . . . . . . . .69.2.  Informative References  . . . . . . . . . . . . . . . . . .61.  Introduction   CableLabs is a non-profit research and development consortium that is   dedicated to pursuing new cable telecommunications technologies and   to helping its cable operator members integrate those technical   advancements into their business objectives.  Within CableLabs,   specification activities are organized into projects such as   DOCSIS(R), PacketCable(TM), and OpenCable(TM), and technical work is   conducted within focus teams.  Product vendors, manufacturers, and   cable operator members are invited to join the focus teams that   create technical specifications.   Occasionally, CableLabs specification efforts require identifiers in   a managed namespace so that they are unique and persistent.  To   ensure that the uniqueness is absolute, the registration of a   specific Uniform Resource Name (URN) [RFC2141] Namespace IdentifierCardona, et al.               Informational                     [Page 2]

RFC 6289               URN Namespace for CableLabs             June 2011   (NID) for use by CableLabs is being specified in this document, in   full conformance with the NID registration process specified in   [RFC3406].2.  URN Specification for CableLabs   Namespace ID:        cablelabs   Registration information:        registration version number: 1        registration date: 2011-04-18   Declared registrant of the namespace:        Registering organization           Name: Cable Television Laboratories, Inc.           Address: 858 Coal Creek Circle, Louisville, CO 80027, USA        Designated contact           Role: Manager, Standards           Email: ietf_standards@cablelabs.com   Declaration of syntactic structure:        The Namespace Specific String (NSS) of all URNs that use the        "cablelabs" NID will have the following structure:        {CLclass}:{CLClassSpecificString}        The "CLclass" is a US-ASCII string that conforms to the URN        syntax requirements specified in [RFC2141] and defines a        specific class of resource type.  Each class will have a        specific labeling scheme that is covered by        "CLClassSpecificString", which also conforms to the naming        requirements of [RFC2141].        CableLabs maintains the CableLabs' Assigned Names and Numbers        [CANN] specification that will contain the assignment of        CableLabs' resource classes and the specific registration values        assigned for each resource class.   Relevant ancillary documentation:        CableLabs publishes information regarding the registered        resources in the CableLabs' Assigned Names and Numbers        specification ([CANN]).Cardona, et al.               Informational                     [Page 3]

RFC 6289               URN Namespace for CableLabs             June 2011   Identifier uniqueness considerations:        CableLabs will manage resource classes using the "cablelabs" NID        and will be the authority for managing resources and associated        subsequent strings.  CableLabs is expected to guarantee the        uniqueness of the strings themselves, or it may permit secondary        responsibility for certain defined resources.        CableLabs could allow the use of experimental type values for        testing purposes only.  Note that using experimental types may        create collisions as multiple users may use the same values for        resources and specific strings.   Identifier persistence considerations:        CableLabs will update the CableLabs' Assigned Names and Numbers        specification ([CANN]) to document the registered resources that        use the "cablelabs" NID.   Process of identifier assignment:        CableLabs 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 CableLabs documents or             services        2.   Registration of values or sub-trees to other entities        3.   Name models for use in experimental purposes   Process for identifier resolution:        The namespace is not listed with a resolution discovery system;        this is not applicable for this URN registration.   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 will be handled by procedures        implemented in support of CableLabs activities.   Scope:        GlobalCardona, et al.               Informational                     [Page 4]

RFC 6289               URN Namespace for CableLabs             June 20113.  Example   The following example represents a hypothetical URN that could be   assigned by CableLabs.   urn:cablelabs:packetcable-example:ue:rst-sample   This example defines the URN to be used for User Equipment (UE)   conforming to the sample Residential SIP Telephony (RST) application   specified within CableLabs' PacketCable RST specification suite.4.  Namespace Considerations   CableLabs develops specifications that may require the use of data   models.  URN Namespaces are key constructs to manage the definitions   of those data models reliably with persistence and uniqueness.   The use of URNs should also help specification authors to maintain   different versions of URNs and dependencies between URNs across   different versions of CableLabs specifications if they so wish.5.  Community Considerations   Participants involved in the development and usage of CableLabs   specifications and cable industry deployments will benefit from the   publication of this namespace by providing consistent and reliable   names for the XML namespaces, schema locations, and similar   identifiers of physical data models published within CableLabs   specifications.   The CableLabs specifications are publicly available and are licensed   to manufacturers on a nondiscriminatory basis.  CableLabs will   maintain the allocation of resources for the "cablelabs" NID within   the following specification: "CableLabs' Assigned Names and Numbers"   [CANN], which will be publicly available for viewing.  CableLabs will   also maintain the corresponding specifications where the registered   resources are referenced or used.6.  IANA Considerations   This document adds a new entry ("cablelabs") in the urn-namespaces   registry.  This is the defining document.  The entry can be found in   the "Uniform Resource Names (URN) Namespaces" registry available from   the IANA site (http://www.iana.org) and any associated mirrors.Cardona, et al.               Informational                     [Page 5]

RFC 6289               URN Namespace for CableLabs             June 20117.  Security Considerations   There are no additional security considerations other than those   normally associated with the use and resolution of URNs in general,   which are described in [RFC1737], [RFC2141], and [RFC3406].8.  Acknowledgements   The authors wish to thank Alfred Hoenes, Ted Hardie, and Peter Saint-   Andre for their useful comments and suggestions.  The authors also   acknowledge that the text from [RFC4358] formed the basis for the   initial version of this document.9.  References9.1.  Normative 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 2002.9.2.  Informative References   [CANN]     Cable Television Laboratories Inc., "CableLabs' Assigned              Names and Numbers", 2011,              <http://www.cablelabs.com/specifications/cpSpecs.html>.   [RFC1737]  Sollins, K. and L. Masinter, "Functional Requirements for              Uniform Resource Names",RFC 1737, December 1994.   [RFC4358]  Smith, D., "A Uniform Resource Name (URN) Namespace for              the Open Mobile Alliance (OMA)",RFC 4358, January 2006.Cardona, et al.               Informational                     [Page 6]

RFC 6289               URN Namespace for CableLabs             June 2011Authors' Addresses   Eduardo Cardona   CableLabs   858 Coal Creek Circle   Louisville, CO  80027   USA   Phone: +1 303 661 3375   EMail: e.cardona@cablelabs.com   Sumanth Channabasappa   CableLabs   858 Coal Creek Circle   Louisville, CO  80027   USA   Phone: +1 303 661 3307   EMail: sumanth@cablelabs.com   Jean-Francois Mule   CableLabs   858 Coal Creek Circle   Louisville, CO  80027   USA   Phone: +1 303 661 9100   EMail: jf.mule@cablelabs.comCardona, et al.               Informational                     [Page 7]