content tag contains all the content
information in a document module. It separates the content information
from the document metadata. A document may contain only one
content tag.
<content>
<section id="version">
<title>Document History</title>
<list id="p1">
<item>
Release 0.1: Pre-release.
</item>
</list>
</section>
.
.
.
</content>