INTERNATIONAL ISO/IEC STANDARD 29341-20-4 First edition 2017-09 Information technology UPnP Device Architecture : Part 20-4: Audio video device control protocol - Level 4 Datastructure template Technologies de I'information - Architecture de dispositif UPnP- Partie 20-4: Protocole de controle de dispositif audio-vidéo - Niveau 4 - Modele de structure de données Reference number IS0/IEC29341-20-4:2017(E) EC s Copyright International Organization for Standardization @IS0/IEC 2017 ACKEY, MA out license from IHS IS0/IEC 29341-20-4:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org @ IS0/IEC 2017 - All rights reserved ical Univ/5926867100, User=JACKEY, MA No reproductic or networking pemited without license from IHS IS0/IEC 29341-20-4:2017(E) CONTENTS 1 Scope.. 2 Normative references .... 3 Terms, definitions, symbols and abbreviations 3.1 Provisioning terms... Symbols . Notations and Conventions 4.1 Notation 4.1.1 Data Types 4.1.2 Strings Embedded in Other Strings ... 4.1.3 ExtendedBackus-NaurForm 6 4.2 Derived Data Types .. 4.2.1 Summary .. 4.2.2 CSV Lists.. 4.3 Management of XML Namespaces in Standardized DCPs.. 8 4.3.1 Namespace Prefix Requirements... 4.3.2 Namespace Names, Namespace Versioning and Schema Versioning ......13 4.3.3 Namespace Usage Examples ... ..15 4.4 Vendor-defined Extensions .... 4.4.1 Vendor-defined Action Names ... 4.4.2 Vendor-defined State Variable Names .. .15 4.4.3 Vendor-defined XML Elements and attributes.. .16 4.4.4 Vendor-defined Property Names.. .16 5 Av Datastructure Template. 16 6 Av Datastructure Schema. Annex A (informative) Bibliography .. List of Tables Table 1 EBNF Operators.. Table 2 — Csv Examples . 8 Table 3 Namespace Definitions.. Table 4 — Schema-related Information .11 Table 5 - Default Namespaces for the Av Specifications . .13 List of Figures Figure 1 — Typical Usage of AVDT @ ISO/IEC 2017 - All rights reserved iii Copyright International Organization for Standardization ACKEY,MA vithout license from IHS Not for Re