Hello-3.0.epub - Package File: package.opf

Q

How to create a package file like package.opf for an EPUB 3.1 book?

✍: FYIcenter.com

A

At least one package file, like package.opf, is required for an EPUB 3.1 book in the book ZIP container. It defines required meta data and specifies 2 required content files.

Here is the requirement on a package file:

1. A package file must be named with .opf file extension.

2. A package file must be an XML file and meet the EPUB Packages 3.1 specifications.

3. A package file must specify version="3.0" in the "package" XML element.

4. A package file must specify a unique-identifier and several meta data elements. For example:

    <dc:title>Hello</dc:title>
    <dc:identifier id="id">fyicenter.com.epub.hello</dc:identifier>
    <dc:language>en-US</dc:language>
    <meta property="dcterms:modified">2018-04-01T00:00:00Z</meta>

5. A package file must specify at least 2 XHTML files: one provides navigation information of the book, and the other provides the content of the book.

6. A package file can be placed in any directory of the EPUB 3.0 book ZIP container. But its exact location must be specified correctly in the "container.xml" file.

You can create a package file with any text editor. Here is an example called package.opf:

<?xml version="1.0" encoding="UTF-8"?>
<!-- package.opf
  Copyright (c) FYIcenter.com 
-->
<package xmlns="http://www.idpf.org/2007/opf" version="3.0" 
  unique-identifier="id">
  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
    <dc:title>Hello</dc:title>
    <dc:identifier id="id">fyicenter.com.epub.hello</dc:identifier>
    <dc:language>en-US</dc:language>
    <meta property="dcterms:modified">2018-04-01T00:00:00Z</meta>
  </metadata>
  <manifest>
    <item id="navigation" href="navigation.xhtml" 
      media-type="application/xhtml+xml" properties="nav"/>
    <item id="content" href="content.xhtml" media-type="application/xhtml+xml"/>
  </manifest>
  <spine>
    <itemref idref="content"/>
  </spine>
</package>

Download Hello-3.0.epub, and unzip it. You see an example of "package.opf" in the root directory.

 

Hello-3.0.epub - Navigation File: navigation.xhtml

Hello-3.0.epub - "container.xml" File

Introduction of EPUB 3.0.1 Specification

⇑⇑ EPUB Tutorials

2018-04-24, 134👍, 0💬