1、 ETSI TS 102 851 V1.3.1 (2012-01) Digital Video Broadcasting (DVB); Uniform Resource Identifiers (URI) for DVB Systems Technical Specification ETSI ETSI TS 102 851 V1.3.1 (2012-01)2Reference RTS/JTC-DVB-311 Keywords broadcasting, content, digital, DVB, TV ETSI 650 Route des Lucioles F-06921 Sophia A
2、ntipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The pr
3、esent document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printe
4、rs of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/
5、status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restri
6、ction extend to reproduction in all media. European Telecommunications Standards Institute 2012. European Broadcasting Union 2012. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ET
7、SI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 851 V1.3.1 (2012-01)3Contents Intellectual Property Rights 4g3Foreword . 4g3Introduction 4g31 Scope 6g32 References
8、 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 7g34 URL Schemes for Access to DVB Services . 8g35 Encoding of URI strings and the use of non-Latin characters 9g36 The “dvb:“ URL Scheme 9g36.1 Syntax of the “
9、dvb:“ URL Scheme . 9g36.2 URLs including path references . 11g36.2.1 dvb_entity = dvb_service 11g36.2.2 dvb_entity = dvb_service_component 11g36.2.3 dvb_hier_part = dvb_abs_path 11g36.2.4 dvb_abs_path 11g36.2.5 dvb_entity = dvb_transport_stream 11g36.2.6 Reserved Names . 11g36.3 Interactive applicat
10、ion specific locators . 12g36.3.1 Extended Application Locator 12g36.3.2 TV Locators 12g36.3.3 Application Locator 12g36.3.4 AIT Locators . 13g36.3.5 Exit Locator 13g36.3.6 Server Domain 13g36.4 EPG, BCG and ESG Specific Locators 13g36.4.1 DVB Event Constraint 13g36.4.2 Restrictions of EPG, BCG and
11、ESG Specific Locators 14g36.4.3 Locators in Metadata 14g36.5 Resolution. 15g37 The “urn:dvb“ Scheme . 15g37.1 Management of the “urn:dvb“ URL Scheme 15g37.2 “urn:dvb“ Syntax and Naming Convention 15g3Annex A (informative): Bibliography . 16g3History 17g3ETSI ETSI TS 102 851 V1.3.1 (2012-01)4Intellec
12、tual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights
13、(IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has bee
14、n carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by Joint T
15、echnical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in
16、the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcas
17、ting organizations whose work includes the co-ordination of its members activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union
18、CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 The Digital Video Broadcasting Project (DVB) is an industry-led consortium of broadcasters, manufacturers, network operators, software developers, regulatory bodies, content owners and others committed to designi
19、ng global standards for the delivery of digital television and data services. DVB fosters market driven solutions that meet the needs and economic circumstances of broadcast industry stakeholders and consumers. DVB standards cover all aspects of digital television from transmission through interfaci
20、ng, conditional access and interactivity for digital video, audio and data. The consortium came together in 1993 to provide global standardisation, interoperability and future proof specifications. Introduction In its current strict technical meaning, a URL (Uniform Resource Locator) is a URI (Unifo
21、rm Resource Identifier) which, “in addition to identifying a resource, provides a means of locating the resource by describing its primary access mechanism (e.g. its network location)“ RFC 3986 14. Often, the term “URL“ is used even though a URI is being referred to. Before RFC 1630 i.1 formally def
22、ined the term URI as a generic term best suited for the concept in June 1994, “Uniform Resource Locator“ was used widely for designating network-retrievable documents which were the core idea of the World Wide Web. This imprecise use of the term has continued until to date. “Uniform Resource Names (
23、URNs) on the other hand are intended to serve as persistent, location-independent resource identifiers and are designed to make it easy to map other namespaces (that share the properties of URNs) into URN-space. Therefore, the URN syntax provides a means to encode character data in a form that can b
24、e sent in existing protocols, transcribed on most keyboards, etc.“ RFC 2141 i.2. ETSI ETSI TS 102 851 V1.3.1 (2012-01)5So a URN globally refers to an entity regardless from where and how it may be retrieved, whilst a URL globally refers to a location without implying anything about the object that c
25、an be retrieved from that location. Both URNs and URLs are subsets of URI. ETSI ETSI TS 102 851 V1.3.1 (2012-01)61 Scope The present document specifies the syntax, semantics and encoding of the Uniform Resource Identifier (URI) schemes for use with DVB systems. The following URI schemes are covered:
26、 dvb: exit: These URI schemes are used to refer to locations on DVB networks from both, within DVB networks and from outside of DVB networks. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific referenc
27、es, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While
28、any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ISO/IEC 13818-1: “Information technology - Generic cod
29、ing of moving pictures and associated audio information: Systems“. 2 ISO/IEC 13818-2: “Information technology - Generic coding of moving pictures and associated audio information: Video“. 3 ISO/IEC 13818-3: “Information technology - Generic coding of moving pictures and associated audio information
30、- Part 3: Audio“. 4 ISO/IEC 13818-4: “Information technology - Generic coding of moving pictures and associated audio information - Part 4: Conformance testing“. 5 ISO/IEC 13818-6: “Information technology - Generic coding of moving pictures and associated audio information - Part 6: Extensions for D
31、SM-CC“. 6 ISO/EC 13818-9: “Information technology - Generic coding of moving pictures and associated audio information - Part 9: Extension for real time interface for systems decoders“. 7 ISO/IEC 13818-10: “Information technology - Generic coding of moving pictures and associated audio information -
32、 Part 10: Conformance extensions for Digital Storage Media Command and Control (DSM-CC)“. 8 ETSI EN 300 468: “Digital Video Broadcasting (DVB); Specification for Service Information (SI) in DVB systems“. 9 ETSI TS 102 812: “Digital Video Broadcasting (DVB); Multimedia Home Platform (MHP) Specificati
33、on 1.1.1“. 10 ISO/IEC 8601 (2002): “Data elements and interchange formats - Information interchange - Representation of dates and times“. ETSI ETSI TS 102 851 V1.3.1 (2012-01)711 IETF RFC 5328 (September 2008): “A Uniform Resource Name (URN) Namespace for the Digital Video Broadcasting Project (DVB)
34、“, A. Adolf and P. MacAvock. 12 ETSI EN 301 192: “Digital Video Broadcasting (DVB); DVB specification for data broadcasting“. 13 IETF RFC 2234: “Augmented BNF for Syntax Specifications: ABNF“. 14 IETF RFC 3986: “Uniform Resource Identifier (URI): Generic Syntax“. 2.2 Informative references The follo
35、wing referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 IETF RFC 1630: “Universal Resource Identifiers in WWW A Unifying Syntax for the Expression of Names and Addresses of Objects on the Network a
36、s used in the World-Wide Web“. i.2 IETF RFC 2141: “URN Syntax“. i.3 IETF RFC 791: “Internet Protocol - DARPA Internet Program Protocol Specification“. i.4 IETF RFC 2838: “Uniform Resource Identifiers for Television Broadcasts“. i.5 Digital Audio-Visual Council (DAVIC) (1999): “DAVIC 1.4.1 Specificat
37、ion Part 9 - Information Representation“. i.6 UK Digital TV Group (UK DTG) (May 2003): “Digital Terrestrial Television MHEG-5 Specification“. i.7 ETSI TR 102 679: “Digital Video Broadcasting (DVB); Register of DVB URNs and Classification Schemes“. 3 Definitions and abbreviations 3.1 Definitions For
38、the purposes of the present document, the terms and definitions given in EN 300 468 8 apply. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AIT Application Information Table NOTE: See TS 102 812 9. ABNF Augmented Backus-Naur Form NOTE: See RFC 2234 13.
39、 BCG Broadband Content Guide BNF Backus-Naur Form NOTE: See RFC 2234 13. EPG Electronic Programme Guide NOTE: See EN 300 468 8. ESG Electronic Service Guide ETSI ETSI TS 102 851 V1.3.1 (2012-01)8DAVIC Digital Audio Video Council NOTE: www.davic.org DSM-CC Digital Storage Media Command and Control NO
40、TE: See ISO/IEC 13818-6 5. DSI DownloadServerInitiate NOTE: See EN 301 192 12 DTG UK Digital TV Group NOTE: See i.6. DVB Digital Video Broadcasting NOTE: www.dvb.org DVB-SI DVB Service Information NOTE: See EN 300 468 8. ECG Electronic Content Guide ESG Electronic Service Guide IETF Internet Enginee
41、ring Task-Force NOTE: www.ietf.org IP Internet Protocol NOTE: See RFC 791 i.3. NIT Network Information Table NOTE: See EN 300 468 8. NSAP Network Service Access Point RFC Request for Comments (published by IETF) SD“). The present document currently makes no use of such parameters. Implementations co
42、nforming to the present document shall ignore any such parameters to ensure compatibility with future specifications. When a path is present in a URL where the dvb_entity part identifies a DVB service, the path references an object in an object carousel within the service. If there are multiple obje
43、ct carousels within the same service, the rule on how to select the default one is to be defined. ETSI ETSI TS 102 851 V1.3.1 (2012-01)116.2 URLs including path references When a path is present in a URL where the dvb_entity part identifies one component of a DVB service and that component carries a
44、n object carousel stream, the path references an object in an object carousel whose root (i.e. DSI message) is sent within that component. Note that the referenced object itself is not necessarily carried in the component identified in the URL, but the component in the URL identifies only the compon
45、ent carrying the root of the object carousel in which the referenced object is carried. The semantics when the path is present in the URL and where the dvb_entity part identifies something else than the two cases described above is not defined in the present document and is reserved for future use.
46、When the dvb_net_path part is missing and only the dvb_abs_path is present, the URL refers to a file in a default object carousel within the current service. The current service is dependent on the usage context. 6.2.1 dvb_entity = dvb_service When a path is present in a URL where the dvb_entity par
47、t identifies a DVB service, the path references an object in an object carousel within the service. If the dvb_service_component element is not present there shall only be one Object Carousel in the DVB service. 6.2.2 dvb_entity = dvb_service_component When a path is present in a URL where the dvb_e
48、ntity part identifies one component of a DVB service and that component carries an object carousel stream, the path references an object in an object carousel whose “root“ (i.e. DSI message) is sent within that component. In this case the component tag set shall only contain one element. The semanti
49、cs when the path is present in URL where the dvb_entity part identifies something else than the two cases described above are not specified in the present document. 6.2.3 dvb_hier_part = dvb_abs_path When the dvb_net_path part is missing and only the dvb_abs_path is present, the URL refers to a file in a default object carousel within the current service. The “current“ service is dependent on the usage context. 6.2.4 dvb_abs_path The following restrictions apply to the dvb_abs_path part of a
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