eBook Improved

For navigation NCX is outdated but for backward compatibility it is used in epub or kindle ebook pack. epub v3.0 recommend inetrnal TOC as NCX for navigation. But for backward compatibility you can put ncx file in OPS directory. For this features you should design TOC by using OL tag. Nested ol tag makes navigation on or off... Structure of Internal Table of Contents: < html xmlns = "http://www.w3.org/1999/xhtml"        xmlns:epub = "http://www.idpf.org/2007/ops" > < head >      < title >TOC Example</ title > </ head > < body > < section epub:type = "frontmatter toc" >   < header >          < h1 >Contents</ h1 >   </ header> <nav epub:type="toc" id="contents"> <h2 class="hcontents">Contents</h2> <ol> <li><a href="cover.xhtml">Cover</a></li> <li...

If you use this equation as such in your ebook than epub v3 allow you to use the capability of mathml in your source code with some recommendations: Recommendations: First you have to write the mathml code for this equation, for this Open Office Math editor is a good choice. Open it and write the code it is as easy as writing the sentence. Save this code as .mml , now it looks like as: <math xmlns="http://www.w3.org/1998/Math/MathML">  <semantics>   <mrow>    <mrow>     <mi>x</mi>     <mo stretchy="false">=</mo>     <mrow>      <mfrac>       <mn>6</mn>       <mi>y</mi>      </mfrac>      <mo stretchy="false">−</mo>      <mfrac>       <mn>5</mn>       <msup>     ...