信息技术数字出版EPUB3第1部分:EPUB3概述

[中文适用范围]： 本文件提供了EPUB 3规范的概述，包括构建EPUB 3的四个构建块规范文档的路线图。它旨在为希望了解这些规范的內容作者和软件开发者提供起点。本文件包含非规范性概述材料，包括对EPUB 3四个构建块规范文档的路线图。 [外文原描述]： The EPUB® specification is a distribution and interchange format standard for digital publications and documents. EPUB defines a means of representing, packaging and encoding structured and semantically enhanced Web content — including HTML5, CSS, SVG, images, and other resources — for distribution in a single-file format.EPUB 3, the third major release of the standard, consists of a set of four specifications, each defining an important component of an overall EPUB Publication:-EPUB Publications 3.0 [Publications30], which defines publication-level semantics and overarching conformance requirements 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 Open Container Format (OCF) 3.0 [OCF3], which defines a file format and processing model for encapsulating a set of related resources into a single-file (ZIP) EPUB Container.-EPUB Media Overlays 3.0 [MediaOverlays30], which defines a format and a processing model for synchronization of text and audio.EPUB has been widely adopted as the format for digital books (eBooks), and these new specifications significantly increase the format's capabilities in order to better support a wider range of publication requirements, including complex layouts, rich media and interactivity, and global typography features. The expectation is that EPUB 3 will be utilized for a broad range of content, including books, magazinesand educational, professional and scientific publications.This document provides a starting point for content authors and software developers wishing tounderstand these specifications. It consists of non-normative overview material, including a roadmap tothe four building-block specification documents that compose EPUB 3.Another non-normative document, EPUB 3 Changes from EPUB 2.0.1 [EPUB3Changes], describeschanges in EPUB 3 from the previous version, but is intended primarily for Authors and EPUB ReadingSystem vendors migrating from EPUB 2.0.1 to EPUB 3 and for those who anticipate supporting both versions.