1<?xml version="1.0" encoding="utf-8"?>
2<!DOCTYPE book
3  PUBLIC "-//Norman Walsh//DTD DocBk XML V3.1.7//EN"
4  "/dtd/3.1.7/docbookx.dtd">
5<book id="book">
6<title>Book Title</title>
7
8<chapter id="ch1">
9<title>test</title>
10<para>How many &deg; can you &copy;.</para>
11<para>And what about <xref linkend="ch1"/>.</para>
12<para>And what about <xref linkend="s1"/>.</para>
13
14<programlisting>
15This is a program
16listing.
17</programlisting>
18
19</chapter>
20</book>
21