<?xml version="1.0" encoding="UTF-8"?>

<book xmlns:xi="http://www.w3.org/2003/XInclude">
  <bookinfo>
    <title>Math Library Manual</title>

    <releaseinfo>Version X.Y</releaseinfo>
  </bookinfo>
  <chapter id="concepts">
    <title>Concepts</title>
  </chapter>
  <chapter id="reference">
    <title>Reference</title>
    <xi:include href="math.xml">
      <xi:fallback>The generated reference...</xi:fallback>
    </xi:include>
  <index type="types">
    <title>Types</title>
  </index>
  <index type="functions">
    <title>Functions</title>
  </index>
  </chapter>
</book>