CAN CSA-ISO IEC 15938-2-2004 Information technology - Multimedia content description interface - Part 2 Description definition language.pdf

1、 Reference numberISO/IEC 15938-2:2002(E)ISO/IEC 2002Information technology Multimedia content description interface Part 2: Description definition language Technologies de linformation Interface de description du contenu multimdia Partie 2: Langage de dfinition de description (DDL) National Standard

2、 of CanadaCAN/CSA-ISO/IEC 15938-2:04(ISO/IEC 15938-2:2002)International Standard ISO/IEC 15938-2:2002 (first edition, 2002-04-01) has been adopted without modification(IDT) as CSA Standard CAN/CSA-ISO/IEC 15938-2:04, which has been approved as a National Standard of Canadaby the Standards Council of

3、 Canada.ISBN 1-55397-314-3 January 2004The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspices this National Standard has been coordinating body of the National Standards system, produced, was chartered in 1919 and accredited by a federation of independen

4、t, autonomousthe Standards Council of Canada to the National organizations working towards the furtherStandards system in 1973. It is a not-for-profit, development and improvement of voluntarynonstatutory, voluntary membership association standardization in the national interest.engaged in standards

5、 development and certification The principal objects of the Council are to foster activities. and promote voluntary standardization as a means CSA standards reflect a national consensus of of advancing the national economy, benefiting theproducers and users including manufacturers, health, safety, a

6、nd welfare of the public, assisting consumers, retailers, unions and professional and protecting the consumer, facilitating domestic organizations, and governmental agencies. The and international trade, and furthering internationalstandards are used widely by industry and commerce cooperation in th

7、e field of standards.and often adopted by municipal, provincial, and A National Standard of Canada is a standard whichfederal governments in their regulations, particularly in has been approved by the Standards Council ofthe fields of health, safety, building and construction, Canada and one which r

8、eflects a reasonableand the environment. agreement among the views of a number of capableIndividuals, companies, and associations across individuals whose collective interests provide to theCanada indicate their support for CSAs standards greatest practicable extent a balance ofdevelopment by volunt

9、eering their time and skills to representation of producers, users, consumers, andCSA Committee work and supporting the Associations others with relevant interests, as may be appropriateobjectives through sustaining memberships. The more to the subject in hand. It normally is a standardthan 7000 com

10、mittee volunteers and the 2000 which is capable of making a significant and timelysustaining memberships together form CSAs total contribution to the national interest.membership from which its Directors are chosen. Approval of a standard as a National Standard ofSustaining memberships represent a m

11、ajor source of Canada indicates that a standard conforms to theincome for CSAs standards development activities. criteria and procedures established by the StandardsThe Association offers certification and testing Council of Canada. Approval does not refer to theservices in support of and as an exte

12、nsion to its technical content of the standard; this remains thestandards development activities. To ensure the continuing responsibility of the accreditedintegrity of its certification process, the Association standards-development organization.regularly and continually audits and inspects products

13、 Those who have a need to apply standards arethat bear the CSA Mark. encouraged to use National Standards of CanadaIn addition to its head office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA has regional branch offices in major to periodic review; therefor

14、e, users are cautioned centres across Canada and inspection and testing to obtain the latest edition from the organizationagencies in eight countries. Since 1919, the preparing the standard.Association has developed the necessary expertise to The responsibility for approving National Standards meet

15、its corporate mission: CSA is an independent of Canada rests with theservice organization whose mission is to provide an Standards Council of Canadaopen and effective forum for activities facilitating the 270 Albert Street, Suite 200exchange of goods and services through the use of Ottawa, Ontario,

16、K1P 6N7standards, certification and related services to meet Canadanational and international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaAlthough the intended primary application of this Standard

17、 is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 15938-2:04 interface Part 2: Description definition languageInformation technol

18、ogy Multimedia content descriptionJanuary 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 15938-2:04Information technology Multimedia content descriptioninterface Part 2: Descriptiondefinition languageCSA PrefaceStandards development within the Information Technology sector is harmonized wi

19、th internationalstandards development. Through the CSA Technical Committee on Information Technology (TCIT),Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onInformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO membe

20、rbody for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of theInternational Telecommunication Union (ITU), Canada participates in the International Telegraph andTelephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT und

21、er the jurisdiction of the StrategicSteering Committee on Information Technology and deemed acceptable for use in Canada. (Acommittee membership list is available on request from the CSA Project Manager.) From time to time,ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these

22、documents for approvaland publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update orcontact a CSA Sales representative. This Standard has been formally approved, without modification, bythe Technical Committee and has been approved as a National Standard of Can

23、ada by the StandardsCouncil of Canada.January 2004 Canadian Standards Association 2004All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission ofthe publisher. ISO/IEC material is reprinted with permission. Where the words “this Internati

24、onal Standard” appear in thetext, they should be interpreted as “this National Standard of Canada”. Inquiries regarding this National Standard of Canada should be addressed to Canadian Standards Association 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 416-747-404

25、4www.csa.caReference numberISO/IEC 15938-2:2002(E)ISO/IEC 2002INTERNATIONAL STANDARD ISO/IEC15938-2First edition2002-04-01Information technology Multimedia content description interface Part 2: Description definition language Technologies de linformation Interface de description du contenu multimdia

26、 Partie 2: Langage de dfinition de description (DDL) ISO/IEC 15938-2:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and

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29、und, please inform the Central Secretariat at the address given below. ISO/IEC 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permissi

30、on in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch ii ISO/IEC 2002 All rights reserved ISO/IEC 15938-2:2002(E

31、) ISO/IEC 2002 All rights reserved iiiContents Page Foreword.iv Introduction.v 1 Scope 1 1.1 Scope of this International Standard.1 1.2 Overview of Description Definition Language1 1.3 Structure of this document.2 2 Normative references2 3 Terms and definitions .4 3.1 Conventions .4 3.2 Wrapper of t

32、he schema.5 3.3 Terminology .5 4 Symbols and abbreviated terms 7 5 MPEG-7-specific Extensions 8 5.1 MPEG-7 Structural Extensions.8 5.2 MPEG-7 Datatype Extensions 11 6 Unused XML Schema Features 14 Annex A (informative) Overview of XML Schema Structural Components.15 A.1 Introduction15 A.2 Detailed D

33、escription15 Annex B (informative) Overview of XML Schema Datatypes29 B.1 Introduction29 B.2 Detailed Description29 Annex C (normative) XML Schema for MPEG-7 Extensions 34 Annex D (informative) Patent statements .35 Bibliography37 ISO/IEC 15938-2:2002(E) iv ISO/IEC 2002 All rights reserved Foreword

34、ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical commi

35、ttees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the w

36、ork. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of the joint technical committee is to prepare International S

37、tandards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. ISO/IEC 15938-2 was prepared by Joint Technical Committee

38、ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. ISO/IEC 15938 consists of the following parts, under the general title Information technology Multimedia content description interface: Part 1: Systems Part 2: Description defi

39、nition language Part 3: Visual Part 4: Audio Part 5: Multimedia description schemes Part 6: Reference software Part 7: Conformance testing Part 8: Extraction and use of MPEG-7 descriptions Annex C forms a normative part of this part of ISO/IEC 15938. Annexes A, B and D are for information only. ISO/

40、IEC 15938-2:2002(E) ISO/IEC 2002 All rights reserved vIntroduction This standard, also known as “Multimedia Content Description Interface“, provides a standardized set of technologies for describing multimedia content. The standard addresses a broad spectrum of multimedia applications and requiremen

41、ts by providing a metadata system for describing the features of multimedia content. The following are specified in this standard: Description Schemes (DS) describe entities or relationships pertaining to multimedia content. Description Schemes specify the structure and semantics of their components

42、, which may be Description Schemes, Descriptors, or datatypes. Descriptors (D) describe features, attributes, or groups of attributes of multimedia content. Datatypes are the basic reusable datatypes employed by Description Schemes and Descriptors. Description Definition Language (DDL) defines Descr

43、iption Schemes, Descriptors, and Datatypes by specifying their syntax, and allows their extension. Systems tools support delivery of descriptions, multiplexing of descriptions with multimedia content, synchronization, file format, and so forth. This standard is subdivided into eight parts: Part 1 Sy

44、stems: specifies the tools for preparing descriptions for efficient transport and storage, compressing descriptions, and allowing synchronization between content and descriptions. Part 2 Description definition language: specifies the language for defining the standard set of description tools (DSs,

45、Ds, and datatypes) and for defining new description tools. Part 3 Visual: specifies the description tools pertaining to visual content. Part 4 Audio: specifies the description tools pertaining to audio content. Part 5 Multimedia description schemes: specifies the generic description tools pertaining

46、 to multimedia including audio and visual content. Part 6 Reference software: provides a software implementation of the standard. Part 7 Conformance testing: specifies the guidelines and procedures for testing conformance of implementations of the standard. Part 8 Extraction and use of MPEG-7 descri

47、ptions: provides guidelines and examples of the extraction and use of descriptions. This document specifies the Description Definition Language (DDL) part of the ISO/IEC 15938 standard. The DDL is the language (and syntax) for constraining the structure and content of MPEG-7 descriptions. This docum

48、ent also provides informative examples demonstrating the use of the DDL to constrain and instantiate MPEG-7 descriptions. INTERNATIONAL STANDARD ISO/IEC 15938-2:2002(E) ISO/IEC 2002 All rights reserved 1Information technology Multimedia content description interface Part 2: Description definition la

49、nguage 1 Scope 1.1 Scope of this International Standard This International Standard specifies a metadata system for describing multimedia content. It specifies the Description Definition Language (DDL) that comprises part 2 of the standard (ISO/IEC 15938-2). The goal of this part of the MPEG-7 International Standard is to specify a language that will enable MPEG-7 users and developers to: create valid MPEG-7 description schemes and descriptors; develop tools such as e