&lt;!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"&gt;
&lt;para&gt;
In the United States, &lt;acronym&gt;NASA&lt;/acronym&gt; stands for the 
National Aeronautics and Space Administration.
&lt;/para&gt;