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Internet Engineering Task Force (IETF)                          P. HiggsRequest for Comments: 7528                                    J. PiesingCategory: Informational                                HbbTV AssociationISSN: 2070-1721                                               April 2015A Uniform Resource Name (URN) Namespacefor the Hybrid Broadcast Broadband TV (HbbTV) AssociationAbstract   This document describes a Uniform Resource Name (URN) namespace for   the Hybrid Broadcast Broadband TV (HbbTV) Association for naming   persistent resources defined within HbbTV specifications.  Example   resources include technical documents and specifications, Extensible   Markup Language (XML) Schemas, classification schemes, XML Document   Type Definitions (DTDs), namespaces, style sheets, media assets, and   other types of resources produced or managed by HbbTV.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/rfc7528.Higgs & Piesing               Informational                     [Page 1]

RFC 7528                        HbbTV URN                     April 2015Copyright Notice   Copyright (c) 2015 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 must   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.Table of Contents1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .2   2.  URN Specification for the HbbTV Namespace Identifier (NID)  .   33.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .54.  Namespace Considerations  . . . . . . . . . . . . . . . . . .55.  Community Considerations  . . . . . . . . . . . . . . . . . .66.  Security Considerations . . . . . . . . . . . . . . . . . . .67.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .68.  References  . . . . . . . . . . . . . . . . . . . . . . . . .78.1.  Normative References  . . . . . . . . . . . . . . . . . .78.2.  Informative References  . . . . . . . . . . . . . . . . .7   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .71.  Introduction   HbbTV (Hybrid Broadcast Broadband TV) is a new industry standard   providing an open and business-neutral technology platform that   seamlessly combines TV services delivered via broadcast with services   delivered via broadband and also enables access to Internet-only   services for consumers using connected TVs and set-top boxes.  The   founding members of the HbbTV consortium together with a large group   of supporters jointly developed the HbbTV specification to create a   global standard for hybrid entertainment services.  Version 1.2.1 of   this specification was published by ETSI as ETSI TS 102 796 [HbbTV12]   in November 2012.   The HbbTV specification is based on existing standards and web   technologies including the Open IPTV Forum (OIPF), Consumer   Electronics Association (CEA), Digital Video Broadcasting (DVB), and   World Wide Web Consortium (W3C).  The standard provides the features   and functionality required to deliver feature-rich broadcast and   Internet services.  Utilizing standard Internet technology, itHiggs & Piesing               Informational                     [Page 2]

RFC 7528                        HbbTV URN                     April 2015   enables rapid application development.  It defines minimum   requirements simplifying the implementation in devices and leaving   room for differentiation; this limits the investment required by   consumer electronics manufacturers to build compliant devices.  The   HbbTV Association is a pan-European initiative aimed at providing an   alternative to proprietary technologies and delivering an open   platform for broadcasters to deliver value-added on-demand services   to the end consumer.   HbbTV has a wide range of supporters from across the broadcaster and   consumer electronics industries.   HbbTV would like to assign unique, permanent, location-independent   names based on URNs for some resources it produces or manages.  These   URNs will be constructed according to the URN syntax defined in   [RFC2141].  This namespace specification is for a formal namespace to   be registered according to the procedures set forth in [RFC3406].2.  URN Specification for the HbbTV Namespace Identifier (NID)   This section provides the information required to register a formal   namespace according to the registration procedure defined in   [RFC3406].  The URNs conform to the syntax defined in [RFC2141].   Namespace ID:      "hbbtv"   Registration Information:      Version:  1      Date:  2014-08-07   Declared registrant of the namespace:      Name:          Mr. Peter Macavock      Title:         Administrator      Affiliation:   HbbTV Association      Address:       L'Ancienne-Route 17A, CH-1218 Grand-Saconnex,                     Switzerland      Phone:         + 41 22 717 27 14      Email:         info@hbbtv.orgHiggs & Piesing               Informational                     [Page 3]

RFC 7528                        HbbTV URN                     April 2015   Declaration of structure:      URNs assigned by HbbTV will have the following structure based on      the organizational structure of the resources specified in the      HbbTV specifications:         urn:hbbtv:<NSS>      where the syntax of "<NSS>" is specified inSection 2.2 of the URN      Syntax requirements [RFC2141].      The individual URNs will be assigned by HbbTV through the process      of development of the HbbTV specifications.   Relevant ancillary documentation:      None.   Identifier uniqueness considerations:      HbbTV will establish unique identifiers as appropriate and will      ensure that an assigned string is never reassigned.   Identifier persistence considerations:      HbbTV is committed to maintaining the accessibility and      persistence of all resources that are officially assigned URNs by      the organization.  The registration tables and information will be      published and maintained by HbbTV on its web site.   Process of identifier assignment:      The assignment of identifiers is fully controlled and managed by      HbbTV.   Process of identifier resolution:      Not applicable; the "hbbtv" namespace is not listed with a      Resolution Discovery System.   Rules for Lexical Equivalence:      The "<NSS>" is case-insensitive.   Conformance with URN Syntax:      No special considerations.Higgs & Piesing               Informational                     [Page 4]

RFC 7528                        HbbTV URN                     April 2015   Validation mechanism:      None specified.  URN assignment will be managed completely and      published by HbbTV.   Scope:      Global3.  Examples   The following example of schemas and classification schemes is taken   from the current HbbTV specification [HbbTV12].      urn:hbbtv:dash:profile:isoff-live:2012   The following examples of schemas and classification schemes are   under consideration for inclusion in a future version of the HbbTV   specification currently under development.      urn:hbbtv:sync:timeline:ebu-tt-d      urn:hbbtv:config:oitf:oitfCapabilities:2014-14.  Namespace Considerations   A unique formal namespace is required by HbbTV in order to specify   how the various existing standards can be linked in order to create a   true end-to-end ecosystem for standards-based IPTV deployments and to   provide the necessary system-wide resources.   URN assignment procedures:      The individual URNs shall be assigned through the process of      development of HbbTV specifications by the Hybrid Broadcast      Broadband TV Association.  The latest information about HbbTV-      defined specifications can always be found at the owner's website      at         <https://hbbtv.org/pages/about_hbbtv/specification.php>   URN resolution/delegation:      The resolution and delegation shall be determined through the      process of development of specifications by the HbbTV Association.Higgs & Piesing               Informational                     [Page 5]

RFC 7528                        HbbTV URN                     April 2015      Since the implementations envisaged cover a wide range of devices      with quite different access methods and capabilities, no single      resolution or delegation mechanism can be referenced in this      document.   Type of resources to be identified:      Types of resources to be identified include XML schema definition      files, classification schemes, and identification systems defined      and published by HbbTV.  These resources being identified      constitute a metadata system to describe digital multimedia      broadcast services or content conveyed as part of such services.      The latest HbbTV-defined specifications can always be found at         <https://hbbtv.org/pages/about_hbbtv/specification.php>5.  Community Considerations   URNs defined by HbbTV will be used by implementers of hybrid   broadcast/broadband systems, services, products, and applications   based on the HbbTV specification.  They are an essential component of   the open ecosystem that is being facilitated by HbbTV.   HbbTV specifications are developed through a consensus-based process   by member organizations representing most aspects of the digital   television ecosystem.  A full list of HbbTV members can be found at      <http://hbbtv.org/pages/hbbtv_association/members.php>6.  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].   This document registers a namespace for URNs.  HbbTV may assign   special meaning to certain of the characters of the Namespace   Specific String (NSS) in its specifications.  Any security   consideration resulting from such assignment is outside the scope of   this document.7.  IANA Considerations   This document defines a URN NID registration of "hbbtv".  IANA has   included it in the "Uniform Resource Names (URN) Namespaces"   registry.Higgs & Piesing               Informational                     [Page 6]

RFC 7528                        HbbTV URN                     April 20158.  References8.1.  Normative References   [RFC1737]  Sollins, K. and L. Masinter, "Functional Requirements for              Uniform Resource Names",RFC 1737, December 1994,              <http://www.rfc-editor.org/info/rfc1737>.   [RFC2141]  Moats, R., "URN Syntax",RFC 2141, May 1997,              <http://www.rfc-editor.org/info/rfc2141>.   [RFC3406]  Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom,              "Uniform Resource Names (URN) Namespace Definition              Mechanisms",BCP 66,RFC 3406, October 2002,              <http://www.rfc-editor.org/info/rfc3406>.8.2.  Informative References   [HbbTV12]  ETSI, "Hybrid Broadcast Broadband TV", ETSI TS 102 796              v1.2.1, November 2012.Authors' Addresses   Paul Higgs   HbbTV Association   c/o Ericsson Inc, 6 Concourse Parkway, suite 400   Atlanta, GA  30328   United States   Phone: +1-650-580-1731   EMail: paul.higgs@ericsson.com   Jonathan Piesing   HbbTV Association   c/o TP Vision Belgium - Innovation Site Europe,   Technologiepark-Zwijnaarde 19,   9052 Gent   Belgium   Phone: +32 484 430 060   EMail: jon.piesing@tpvision.comHiggs & Piesing               Informational                     [Page 7]