&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;structfield&gt;tm_isdst&lt;/structfield&gt; field is non-zero when
the time reported is in daylight savings time.
&lt;/para&gt;