Editing Courses/EPUB/day1 (section)

== Navigation - table of contents ==
The Navigation document is a hyper-linked table-of-contents, that allow the reader to quickly reach the different sections of a ePub.

In EPUB 2 the navigation document was '''toc.ncx''', written in XML. 

EPUB 3 uses file, usually named '''nav.xhtml''', which is slightly simpler document, based of HTML with common tags such as <pre><ol>, <li>, <nav></pre>

In content.opf's manifest the navigation file is referred as: 
 <item href="nav.xhtml" id="nav" media-type="application/xhtml+xml" properties="nav" />


For backward compatibility reasons (most ereaders are only prepared to read EPUB2) the two files might be present in the same ePub publication.

A nav.xhtml: 
<source lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
  <head>
    <title>From Print to Ebooks: a Hybrid Publishing Toolkit for the Arts</title>
    <link rel="stylesheet" type="text/css" href="stylesheet.css" />
  </head>
  <body>
    <nav epub:type="toc">
      <h1 id="toc-title">From Print to Ebooks: a Hybrid Publishing Toolkit for the Arts</h1>
      <ol class="toc">
        <li id="toc-li-1">
          <a href="ch001.xhtml">Colophon</a>
        </li>
        <li id="toc-li-2">
          <a href="ch002.xhtml">1 Introduction</a>
          <ol class="toc">
            <li id="toc-li-3">
              <a href="ch003.xhtml">Industry promises vs. reality</a>
            </li>
            <li id="toc-li-4">
              <a href="ch004.xhtml">What this Toolkit provides</a>
            </li>
         </ol>
        </li>
        <li id="toc-li-8">
          <a href="ch008.xhtml">2 The basics</a>
          <ol class="toc">
            <li id="toc-li-9">
              <a href="ch009.xhtml">Layout and structure of a text</a>
            </li>
          </ol>
        </li>
    </nav>
  </body>
</html>
</source>