1、 ISO/IEC 29341-4-4 Edition 2.0 2011-09 INTERNATIONAL STANDARD Information technology UPnP device architecture Part 4-4:Audio Video Device Control Protocol Level 2 Audio Video Data Structures ISO/IEC 29341-4-4:2011(E)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011 ISO/IEC,Geneva,S
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9、ARD Information technology UPnP device architecture Part 4-4:Audio Video Device Control Protocol Level 2 Audio Video Data Structures INTERNATIONAL ELECTROTECHNICAL COMMISSION L ICS 35.200 PRICE CODE ISBN 978-2-88912-679-8 colourinsideCONTENTS 1Overview and Scope.21.1Introduction.21.2Notation.31.2.1D
10、ata Types.41.2.2Strings Embedded in Other Strings.41.2.3Extended Backus-Naur Form.41.3Derived Data Types.51.3.1Comma Separated Value(CSV)Lists.51.4Management of XML Namespaces in Standardized DCPs.61.4.1Namespace Prefix Requirements.91.4.2Namespace Names,Namespace Versioning and Schema Versioning.10
11、1.4.3Namespace Usage Examples.121.5Vendor-defined Extensions.131.5.1Vendor-defined Action Names.131.5.2Vendor-defined State Variable Names.131.5.3Vendor-defined XML Elements and attributes.131.5.4Vendor-defined Property Names.131.6References.132AV Datastructure Template.173AV Datastructure Schema.23
12、 Figure 1:Typical Usage of AVDT.3 Table 1-1 EBNF Operators.5Table 1-2 CSV Examples.6Table 1-3 Namespace Definitions.8Table 1-4 Schema-related Information.9Table 1-5 Default Namespaces for the AV Specifications.10 29341-4-4 ISO/IEC:2011(E)INFORMATION TECHNOLOGY UPNP DEVICE ARCHITECTURE Part 4-4:Audio
13、 Video Device Control Protocol Level 2 Audio Video Data Structures FOREWORD 1)ISO(International Organization for Standardization)and IEC(International Electrotechnical Commission)form the specialized system for worldwide standardization.National bodies that are members of ISO or IEC participate in t
14、he development of International Standards.Their preparation is entrusted to technical committees;any ISO and IEC member body interested in the subject dealt with may participate in this preparatory work.International governmental and non-governmental organizations liaising with ISO and IEC also part
15、icipate in this preparation.2)In the field of information technology,ISO and IEC have established a joint technical committee,ISO/IEC JTC 1.Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.Publication as an International Standard req
16、uires approval by at least 75%of the national bodies casting a vote.3)The formal decisions or agreements of IEC and ISO on technical matters express,as nearly as possible,an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC and ISO member bodies.4)IEC,ISO and ISO/IEC publications have the form of recommendations for international use and are accepted by IEC and ISO member bodies in that sense.While all reasonable
