Podcast files are identical to rss files except they add an enclosure
tag.
This is used to provide a link to a multimedia file (the podcast).
<item>
<title>Edupod2</title>
<description>
Hospitality 1 - Pouring the Perfect Guiness
</description>
<enclosure
url="http://cybil.tafeitltn.com.au/~capsticm/labs/rss/podcasts/hospitality/guinness.mp3"
length='1600000' type='audio/mpeg' />
</item>
Here are some examples.
Podcasts - my educational podcasts (audio files) xml files
Edupods using rss technologies - a work in progress