&lt;!DOCTYPE synopsis PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"&gt;
&lt;synopsis&gt;
chgrp [-R [-H | -L | -P]] [-f] group file...
&lt;/synopsis&gt;