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Internet Engineering Task Force (IETF) P. Higgs Request for Comments: 7528 J. Piesing Category: Informational HbbTV Association ISSN: 2070-1721 April 2015

              A Uniform Resource Name (URN) Namespace
     for the Hybrid Broadcast Broadband TV (HbbTV) Association


 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; see Section 2 of RFC 5741.
 Information about the current status of this document, any errata,
 and how to provide feedback on it may be obtained at

Higgs & Piesing Informational [Page 1] RFC 7528 HbbTV URN April 2015

Copyright Notice

 Copyright (c) 2015 IETF Trust and the persons identified as the
 document authors.  All rights reserved.
 This document is subject to BCP 78 and the IETF Trust's Legal
 Provisions Relating to IETF Documents
 ( 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 Contents

 1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
 2.  URN Specification for the HbbTV Namespace Identifier (NID)  .   3
 3.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
 4.  Namespace Considerations  . . . . . . . . . . . . . . . . . .   5
 5.  Community Considerations  . . . . . . . . . . . . . . . . . .   6
 6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
 7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
 8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
   8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
   8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
 Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1. 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, it

Higgs & 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:
 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,
    Phone:         + 41 22 717 27 14

Higgs & 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:
    where the syntax of "<NSS>" is specified in Section 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:
 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
 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.

3. Examples

 The following example of schemas and classification schemes is taken
 from the current HbbTV specification [HbbTV12].
 The following examples of schemas and classification schemes are
 under consideration for inclusion in a future version of the HbbTV
 specification currently under development.

4. 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
 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
 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

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

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"

Higgs & Piesing Informational [Page 6] RFC 7528 HbbTV URN April 2015

8. References

8.1. Normative References

 [RFC1737]  Sollins, K. and L. Masinter, "Functional Requirements for
            Uniform Resource Names", RFC 1737, December 1994,
 [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,

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
 Jonathan Piesing
 HbbTV Association
 c/o TP Vision Belgium - Innovation Site Europe,
 Technologiepark-Zwijnaarde 19,
 9052 Gent
 Phone: +32 484 430 060

Higgs & Piesing Informational [Page 7]

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