© ISO/IEC 2000 – All rights reserved INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE NORMALISATION ISO/IEC JTC 1/SC 29/WG 11 CODING OF MOVING PICTURES AND AUDIO ISO/IEC JTC 1/SC 29/WG 11 N3971 March 2001, Singapore Source: Multimedia Description Schemes (MDS) Group Title: MPEG-21 Digital Item Declaration WD (v2.0) Status: Approved Editors: Vaughn Iverson, Young-Won Song, Rik Van de Walle, Mark Rowe, Doim Chang, Ernesto Santos, Todd Schwartz ISO/IEC JTC 1/SC 29 N 3971 Date: 2001-03-23 ISO/IEC WD 21000-2:2001 Information Technology — Multimedia Framework — Part 2: Digital Item Declaration Warning This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change without notice and may not be referred to as an International Standard. Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation. Document type: Document subtype: Document stage: Document language: E C:\WINDOWS\Desktop\TAKE\wnnnn-did-wd.doc STD Version 1.0 ISO/IEC WD 21000-2:2001 Copyright notice This ISO document is a working draft or committee draft and is copyright-protected by ISO. While the reproduction of working drafts or committee drafts in any form for use by participants in the ISO standards development process is permitted without prior permission from ISO, neither this document nor any extract from it may be reproduced, stored or transmitted in any form for any other purpose without prior written permission from ISO. 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Violators may be prosecuted. iv ISO/IEC WD 21000-2:2001 Contents Foreword .................................................................................... ix Introduction ................................................................................. x 1 Scope ..............................................................................................................................................................1 2 Normative references ....................................................................................................................................2 3 Terms, definitions, symbols, abbreviated terms ........................................................................................3 3.1 Terms ..............................................................................................................................................................3 3.1.1 Digital Item......................................................................................................................................................3 3.2 Conventions ...................................................................................................................................................3 3.2.1 Naming convention........................................................................................................................................3 3.2.2 Documentation convention...........................................................................................................................3 3.3 Abbreviations .................................................................................................................................................5 4 Digital Item Declaration Model......................................................................................................................6 4.1 Purpose and Overview ..................................................................................................................................6 4.2 Abstract Model ...............................................................................................................................................6 4.2.1 Container ........................................................................................................................................................6 4.2.2 Item..................................................................................................................................................................6 4.2.3 Component .....................................................................................................................................................6 4.2.4 Anchor.............................................................................................................................................................7 4.2.5 Descriptor .......................................................................................................................................................7 4.2.6 Condition ........................................................................................................................................................7 4.2.7 Choice .............................................................................................................................................................7 4.2.8 Selection .........................................................................................................................................................7 4.2.9 Annotation ......................................................................................................................................................8 4.2.10 Assertion.........................................................................................................................................................8 4.2.11 Resource.........................................................................................................................................................8 4.2.12 Fragment.........................................................................................................................................................8 4.2.13 Statement........................................................................................................................................................8 4.2.14 Predicate .........................................................................................................................................................8 5 Digital Item Declaration Representation....................................................................................................10 5.1 Introduction ..................................................................................................................................................10 5.1.1 Document Conventions...............................................................................................................................10 5.1.2 DIDL Overview..............................................................................................................................................10 5.2 DIDL Definition.............................................................................................................................................11 5.2.1 Validation ......................................................................................................................................................11 5.2.2 Canonicalization...........................................................................................................................................11 5.2.3 Element Descriptions ..................................................................................................................................11 5.2.4 <DIDL>...........................................................................................................................................................13 5.2.5 <DECLARATIONS> ......................................................................................................................................14 5.2.6 <CONTAINER>..............................................................................................................................................15 5.2.7 <ITEM> ..........................................................................................................................................................16 5.2.8 <COMPONENT>............................................................................................................................................18 5.2.9 <RESOURCE>...............................................................................................................................................19 5.2.10 <DESCRIPTOR> ...........................................................................................................................................21 5.2.11 <STATEMENT>.............................................................................................................................................22 5.2.12 <ANCHOR> ...................................................................................................................................................24 5.2.13 <CHOICE> .....................................................................................................................................................27