|
An EPUB is an e-book that can be downloaded and read on a device like a smartphone, tablet, computer, or e-reader. It is a free and open standard published by the International Digital Publishing Forum. The term is short for ''electronic publication'' and is sometimes styled ''ePub''. EPUB became an official standard of the IDPF in September 2007, superseding the older Open eBook standard. The Book Industry Study Group endorses EPUB 3 as the format of choice for packaging content and has stated that the global book publishing industry should rally around a single standard. EPUB is the most widely supported vendor-independent XML-based (as opposed to PDF) e-book format; that is, it is supported by the largest number of hardware readers, including Amazon Kindle Fire. It is also widely used on many software readers such as iBooks on Apple devices, and Google Books on Android. iBooks also supports the proprietary iBook format. This format is based on the EPUB format but depends upon custom widget code in the iBooks app to function. EPUB 2.0 was approved in October 2007, with a maintenance update (2.0.1) approved in September 2010.〔(【引用サイトリンク】title= 1.1 EPUB Revision History )〕 The EPUB3 specification was published in November 2014. New major features include support for precise layout or specialized formatting, such as for comic books, and MathML support. ==Features== The format and many readers support the following: * Reflowable document: a reader can optimize text for a particular display device. EPUB also supports fixed-layout content〔(【引用サイトリンク】url=http://www.idpf.org/epub/301/spec/epub-publications.html#sec-package-metadata-fxl )〕 Fixed-layout pre-paginated content can be useful for certain kinds of highly-designed content such as illustrated books that are designed to be consumed only on a larger-screen device, such as a tablet. * Like an HTML web site, the format supports inline raster and vector images, metadata, and CSS styling. * Bookmarking of a page. * Highlight passages and make notes. * Many readers include a library where books can be sorted and searched. * Font size can be enlarged or made smaller. Text and background color can be changed. * MathML: theoretical support of a subset of MathML.〔(【引用サイトリンク】url=http://www.idpf.org/epub/30/spec/epub30-contentdocs.html#sec-xhtml-mathml )〕 * Digital rights management: an EPUB can contain Digital Rights Management (DRM) as an optional layer.〔(【引用サイトリンク】 Digital Book Standards FAQs )〕 The EPUB specification does not enforce or suggest a particular DRM scheme. This could affect the level of support for various DRM systems on devices and the portability of purchased e-books. Consequently, such DRM incompatibility may segment the EPUB format along the lines of DRM systems, undermining the advantages of a single standard format and confusing the consumer. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「EPUB」の詳細全文を読む スポンサード リンク
|