Presentations usually have more metadata in the slidesinfo wrapper. Here's a typical example:
<slidesinfo>
<title>Supporting Localized Generated Text</title>
<titleabbrev>Generated Text</titleabbrev>
<author><firstname>Norman</firstname><surname>Walsh</surname></author>
<pubdate>Sunday, 08 Apr 2001</pubdate>
<confgroup>
<conftitle>XSLTUK-01</conftitle>
<confdates>08 Apr - 09 Apr 2001</confdates>
<conftitle role="address">Keble College, Oxford, UK</conftitle>
<confnum>1</confnum>
</confgroup>
<releaseinfo role="version">Version TEST</releaseinfo>
<copyright><year>2001</year>
<holder>Sun Microsystems, Inc.</holder></copyright>
</slidesinfo>