&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;
The &lt;option&gt;-a&lt;/option&gt; option on the &lt;acronym&gt;UNIX&lt;/acronym&gt;
&lt;command&gt;ls&lt;/command&gt; command or the &lt;option&gt;/r&lt;/option&gt; option on the
&lt;acronym&gt;DOS&lt;/acronym&gt; &lt;command&gt;attrib&lt;/command&gt;
command, for example.
&lt;/para&gt;