1、 Reference number ISO/IEC TS 30135-4:2014(E) ISO/IEC 2014TECHNICAL SPECIFICATION ISO/IEC TS 30135-4 First edition 2014-11-15Information technology Digital publishing EPUB3 Part 4: Open Container Format Technologies de linformation Publications numriques EPUB3 Partie 4: Format de conteneur ouvert ISO
2、/IEC TS 30135-4:2014(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2014 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 intra
3、net, without prior written permission. Permission can be requested 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.org Web www.iso.org Pub
4、lished in Switzerland ii ISO/IEC 2014 All rights reservedISO/IEC TS 30135-4:201 4(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members o
5、f ISO or IEC participate in the development of International Standards through technical committees 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 organiza
6、tions, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. 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 Di
7、rectives, Part 2. The main task of the joint technical committee is to prepare International Standards. 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
8、the national bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, the joint technical committee may decide to publish an ISO/IEC Technical Specification (ISO/IEC TS), which represents an agreement between the members of the joint
9、technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/IEC TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdraw
10、n. If the ISO/IEC TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO a
11、nd IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC TS 30135 series were prepared by Korean Agency for Technology and Standards (as KS X 6070 series) with International Digital Publishing Forum and were adopted, under a special “fast-track procedure”, by Joint
12、 Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by the national bodies of ISO and IEC. ISO/IEC TS 30135 consists of the following parts, under the general title Information technology Document description and processing languages EPUB 3: Part 1: Overview Par
13、t 2: Publications Part 3: Content Documents Part 4: Open Container Format Part 5: Media Overlay Part 6: Canonical Fragment Identifier Part 7: Fixed-Layout Documents EPUB Open Container Format (OCF) 3.0 Recommended Specification 11 October 2011 THIS VERSION http:/www.idpf.org/epub/30/spec/epub30-ocf-
14、20111011.html LATEST VERSION http:/www.idpf.org/epub/30/spec/epub30-ocf.html PREVIOUS VERSION http:/www.idpf.org/epub/30/spec/epub30-ocf-20110908.html A diff of changes from the previous draft is available at this link. Please refer to the errata for this document, which may include some normative c
15、orrections. Copyright 2010, 2011 International Digital Publishing Forum All rights reserved. This work is protected under Title 17 of the United States Code. Reproduction and dissemination of this work with changes is prohibited except with the written permission of the International Digital Publish
16、ing Forum (IDPF). EPUB is a registered trademark of the International Digital Publishing Forum. Editors James Pritchett, Learning Ally (formerly Recording for the Blind & Dyslexic) Markus Gylling, DAISY Consortium TAB LE O F CO NTENTS 1. Overview 1.1. Purpose and Scope 1.2. Terminology 1.3. Conforma
17、nce Statements 1.4. Content Conformance 1.5. Reading System Conformance 2. OCF Abstract Container 2.1. Overview 2.2. File and Directory Structure 2.3. Relative IRIs for Referencing Other Components 2.4. File Names 2.5. META-INF 2.5.1. Container META-INF/container.xml 2.5.2. Encryption META-INF/encry
18、ption.xml 2.5.3. Manifest META-INF/manifest.xml 2.5.4. Metadata META-INF/metadata.xml 2.5.5. Rights Management META-INF/rights.xml 2.5.6. Digital Signatures META-INF/signatures.xml 3. OCF ZIP Container 3.1. Overview 3.2. ZIP File Requirements 3.3. OCF ZIP Container Media Type Identification 4. Font
19、Obfuscation 4.1. Introduction 4.2. Obfuscation Algorithm 4.3. Generating the Obfuscation Key 4.4. Specifying Obfuscated Resources A. Schemas A.1. Schema for container.xml A.2. Schema for encryption.xml A.3. Schema for signatures.xml B. Example C. The application/epub+zip Media Type D. Acknowledgemen
20、ts and Contributors References 1 Overview 1.1 Purpose and Scope This section is informative This specification, EPUB Open Container Format (OCF) 3.0, defines a file format and processing model for encapsulating the sets of related resources that comprise one or more EPUB Publications into a single-f
21、ile container. This specification is one of a family of related specifications that compose EPUB 3, the third major revision of an interchange and delivery format for digital publications based on XML and Web Standards. It is meant to be read and understood in concert with the other specifications t
22、hat make up EPUB 3: The EPUB 3 Overview EPUB3Overview, which provides an informative overview of EPUB and a roadmap to the rest of the EPUB 3 documents. The Overview should be read first. EPUB Publications 3.0 Publications30, which defines publication-level semantics and overarching conformance requ
23、irements for EPUB Publications. EPUB Content Documents 3.0 ContentDocs30, which defines profiles of XHTML, SVG and CSS for use in the context of EPUB Publications. EPUB Media Overlays 3.0 MediaOverlays30, which defines a format and a processing model for synchronization of text and audio. OCF is the
24、 required container technology for EPUB Publications. OCF may play a role in the following workflows: During the preparation steps in producing an electronic Publication, OCF may be used as the container format when exchanging in-progress Publications between different individuals and/or different o
25、rganizations. When providing an electronic Publication from publisher or conversion house to the distribution or sales channel, OCF is the recommended container format to be used as the transport format. When delivering the final Publication to an EPUB Reading System or User, OCF is the required for
26、mat for the container that holds all of the assets that make up the Publication. The OCF specification defines the rules for structuring the file collection in the abstract: the “abstract container“. It also defines the rules for the representation of this abstract container within a ZIP archive: th
27、e “physical container“. The rules for ZIP physical containers build upon the ZIP technologies used by ODF. OCF also defines a standard method for obfuscating embedded fonts for those EPUB Publications that require this functionality. This specification supersedes Open Container Format (OCF) 2.0.1 OC
28、F2. Refer to EPUB3Changes for information on differences between this specification and its predecessor. 1.2 Terminology EPUB Publication (or Publication) A logical document entity consisting of a set of interrelated resources and packaged in an EPUB Container, as defined by this specification and i
29、ts sibling specifications. Publication Resource A resource that contains content or instructions that contribute to the logic and rendering of the EPUB Publication. In the absence of this resource, the Publication might not render as intended by the Author. Examples of Publication Resources include
30、the Package Document, EPUB Content Documents, EPUB Style Sheets, audio, video, images, embedded fonts and scripts. With the exception of the Package Document itself, Publication Resources must be listed in the manifest Publications30 and must be bundled in the EPUB container file unless specified ot
31、herwise in Publication Resource Locations Publications30. Examples of resources that are not Publication Resources include those identified by the Package Document link Publications30 element and those identified in outbound hyperlinks that resolve outside the EPUB Container (e.g., referenced from a
32、n HTML5 a element href attribute). EPUB Content Document A Publication Resource that conforms to one of the EPUB Content Document definitions (XHTML or SVG). An EPUB Content Document is a Core Media Type, and may therefore be included in the EPUB Publication without the provision of fallbacks Public
33、ations30. XHTML Content Document An EPUB Content Document conforming to the profile of HTML5 defined in XHTML Content Documents ContentDocs30. XHTML Content Documents use the XHTML syntax of HTML5. SVG Content Document An EPUB Content Document conforming to the constraints expressed in SVG Content D
34、ocuments ContentDocs30. Core Media Type A set of Publication Resource types for which no fallback is required. Refer to Publication Resources Publications30 for more information. Package Document A Publication Resource carrying bibliographical and structural metadata about the EPUB Publication, as d
35、efined in Package Documents Publications30. Manifestation The digital (or physical) embodiment of a work of intellectual content. Changes to the content such as significant revision, abridgement, translation, or the realization of the content in a different digital or physical form result in a new m
36、anifestation. There may be many individual but identical copies of a manifestation, termed instances or items. The ISBN is an example of a manifestation identifier, and is shared by all instances of that manifestation. All instances of a manifestation need not be bit-for-bit identical, as minor corr
37、ections or revisions are not judged to create a new manifestation or work. Unique Identifier The Unique Identifier is the primary identifier for an EPUB Publication, as identified by the unique-identifier attribute. The Unique Identifier may be shared by one or many Manifestations of the same work t
38、hat conform to the EPUB standard and embody the same content, where the differences between the Manifestations are limited to those changes that take account of differences between EPUB Reading Systems (and which themselves may require changes in the ISBN). The Unique Identifier is less granular tha
39、n the ISBN. However, significant revision, abridgement, etc. of the content requires a new Unique Identifier. EPUB Style Sheet (or Style Sheet) A CSS Style Sheet conforming to the CSS profile defined in EPUB Style Sheets ContentDocs30. Viewport The region of an EPUB Reading System in which the conte
40、nt of an EPUB Publication is rendered visually to a User. EPUB Container (or Container) The ZIP-based packaging and distribution format for EPUB Publications defined in OCF ZIP Container. OCF Processor A software application that processes EPUB Containers according to this specification. Author The
41、person(s) or organization responsible for the creation of an EPUB Publication, which is not necessarily the creator of the content and resources it contains. User An individual that consumes an EPUB Publication using an EPUB Reading System. EPUB Reading System (or Reading System) A system that proce
42、sses EPUB Publications for presentation to a User in a manner conformant with this specification and its sibling specifications. 1.3 Conformance Statements The keywords “MUST“, “MUST NOT“, “REQUIRED“, “SHALL“, “SHALL NOT“, “SHOULD“, “SHOULD NOT“, “RECOMMENDED“, “MAY“, and “OPTIONAL“ in this document
43、 are to be interpreted as described in RFC2119. All sections of this specification are normative except where identified by the informative status label “This section is informative“. The application of informative status to sections and appendices applies to all child content and subsections they m
44、ay contain. All examples in this specification are informative. 1.4 Content Conformance An OCF Abstract Container must meet the conformance constraints defined in OCF Abstract Container. An OCF ZIP Container (also referred to as an EPUB Container) must meet the conformance constraints defined in OCF
45、 ZIP Container. 1.5 Reading System Conformance An EPUB Reading System must meet all of the following criteria: It must process the OCF ZIP Container in conformance with all Reading System conformance constraints expressed in OCF ZIP Container. If it has a Viewport, it must support deobfuscation of f
46、onts as defined in Font Obfuscation. 2 OCF Abstract Container 2.1 Overview This section is informative An OCF Abstract Container defines a file system model for the contents of the container. The file system model uses a single common root directory for all of the contents of the container. All (non
47、-remote) resources for embedded Publications are located within the directory tree headed by the containers root directory, although no specific file system structure is mandated for this. The file system model also includes a mandatory directory named META-INF that is a direct child of the containe
48、rs root directory and is used to store the following special files: container.xml required Identifies the file that is the point of entry for each embedded Publication. signatures.xml optional Contains digital signatures for various assets. encryption.xml optional Contains information about the encr
49、yption of Publication resources. (This file is required if font obfuscation is used.) metadata.xml optional Used to store metadata about the container. rights.xml optional Used to store information about digital rights. manifest.xml allowed A manifest of container contents as allowed by Open Document Format ODF. Complete conformance requirements for the various files in META-INF are found in META-INF. 2.2 File and Directory Structure The virtual file
