INTERNATIONAL ISO/IEC STANDARD 29500-2 Fourth edition 2021-08 Document description and processing languages Office Open XML file formats Part 2: Open packaging conventions Description des documents et langages de traitement - Formats de fichier"Office Open XML" Partie 2: Conventions de paquetage ouvert Reference number ISO/IEC 29500-2:2021(E) ISO E @IS0/IEC2021 IS0/IEC 29500-2:2021(E) COPYRIGHT PROTECTED DOCUMENT @ISO/IEC2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below or Iso's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122749 0111 Email: [email protected] Website:www.iso.org Published in Switzerland ii @ IS0/IEC 2021 - All rights reserved IS0/IEC 29500-2:2021(E) Contents Page Foreword .. Introduction ..vii 1 Scope. 2 Normative references 3 Terms and definitions ..2 3.1 Basics.. .2 3.2 Abstract package model 3.3 Physical package model 4 3.4 Digital signature and thumbnail 3.5 Implementations. 5 3.6 Core properties. .5 4 Conformance .5 5 Overview ..5 6 Abstract package model 6.1 General .6 6.2 Parts 6.2.1 General. .6 6.2.2 Part names. ..6 6.2.3 Media types ..8 6.2.4 Growth hint. .8 6.2.5 XML usage. .8 6.3 Part addressing ..8 6.3.1 General 6.3.2 Pack scheme .9 6.3.3 Resolving a pack IRI to a resource. .10 6.3.4 Composing a pack IRI .10 6.3.5 Equivalence ..11 6.4 Resolving relative references.. .11 6.4.1 General. ..11 6.4.2 Base IRIs .11 6.4.3 Examples. .12 6.5 Relationships .14 6.5.1 General. .14 6.5.2 Relationships part. ..14 6.5.3 Relationship markup .15 6.5.4 Examples .17 7 Physical package model .19 7.1 General .19 7.2 Physical mapping guidelines. 19 7.2.1 Using features of physical formats .19 7.2.2 Mapped components. .20 7.2.3 Mapping media types to parts. 20 7.2.4 Interleaving 23 7.2.5 Mapping part names to physical package item names. 23 7.3 Mapping to a ZIP file. 25 7.3.1 General. 25 7.3.2 Mapping part data .25 7.3.3 ZIP item names. .26 7.3.4 Mapping logical item names to ZiP item names .26 7.3.5 Mapping zIP item names to logical item names .26 7.3.6 ZIP package limitations.. .26 7.3.7 Mapping the Media Types stream .27 @ IS0/IEC 2021 - All rights reserved iii IS0/IEC 29500-2:2021(E) 7.3.8 Mapping the growth hint. 27 8 Core properties 27 8.1 General. 27 8.2 Core Properties part. 28 8.3 Core properties markup 28 8.3.1 General. 28 8.3.2 Support for versioning and extensibility 29 8.3.3 coreProperties element 29 8.3.4 Core property elements. 29 9 Thumbnails .32 10 Digital signatures.. .32 10.1 General. .32 10.2 Overview of OPC-specific restrictions and extensions to "XML-Signature Syntax and Processing" 32 10.3 Choosing content to sign 32 10.4 Digital signature parts. 33 10.4.1 General. 33 10.4.2 Digital Signature Origin part 33 10.4.3 Digital Signature XML Signature part 33 10.4.4 Digital Signature Certificate part 34 10.5 Digital signature markup 34 10.5.1 General. 34 10.5.2 Support for versioning and extensibility 34 10.5.3 Signature element 34 10.5.4 SignedInfoelement. 35 10.5.5 CanonicalizationMethod element 35 10.5.6 SignatureMethod element. 35 10.5.7 Reference element 35 10.5.8 Transformelement 36 10.5.9 RelationshipReference element 37 10.5.10 RelationshipsGroupReference element 37 10.5.11 DigestMethod element. 37 10.5.12 Object element. 38 10.5.13 Manifest element 38 10.5.14 signaturePropertyelement 38 10.5.15 SignatureTime element. 38 10.5.16 Format element 38 10.5.17 Value element 39 10.5.18 xPath element 39 10.6 Relationships transform algorithm 39 10.7 Digital signature example 40 10.8 Generating signatures. 41 10.9 Validating signatures. 43 Annex A (informative) Preprocessing for generating relative references 45 Annex B (normative) Constraints and clarifications on the use of ziP features. 46 Annex C (norma