&lt;!DOCTYPE warning PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"&gt;
&lt;warning&gt;
&lt;para&gt;
Striking your thumb with a hammer may cause severe pain and discomfort.
&lt;/para&gt;
&lt;/warning&gt;