boost-react-native-bundle/boost_1_57_0/libs/variant/doc/tutorial/tutorial.xml

Boost library as in https://sourceforge.net/projects/boost/files/boost/1.57.0/

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
  "http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<!--
    Copyright 2003, Eric Friedman, Itay Maman.

    Distributed under the Boost Software License, Version 1.0. (See accompanying
    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-->
<section xmlns:xi="http://www.w3.org/2001/XInclude" id="variant.tutorial">

<title>Tutorial</title>
  <xi:include href="basic.xml"/>
  <xi:include href="advanced.xml"/>

</section>