Epub

Inside the epub

epub files are zip files which contains specifics files

├── META-INF/
│   └── container.xml
├── EPUB/
│   ├── ... (content files/folders: xhtml, css, image, fonts)
│   └── package.opf
└── mimetype

Note that the folder EPUB/ is optional, you can directly use a package.opf and your files

Content of the zip

• mimetype it just contains the epub mimetype

  application/epub+zip

• META-INF/container.xml

  • a xml file which contains the link to the package.opf

• EPUB/package.opf

  • a xml file which contains four child:
    • <metadata>: informations about the epub (e.g. title, language, isbn, creator..)
    • <manifest>: list all the content files available in the epub
    • <spine>: all the content in reading order
    • <guide>: (optional) to identify fundamental structural components of the book

Format and specification

• https://www.w3.org/publishing/epub3/

• EPUB 2 provides all the formatting and layout capabilities of XHTML 1.1 and CSS2.

• EPUB 3 officially became a standard in late October 2011.The recent EPUB 3 defines profiles of HTML5, SVG, and CSS for use for enhanced Publications.