OPML is a great simple format for heirarchical data. It was quite
easy to adapt another link viewer to read OPML (originally by Mark
Davis, http://drdreff.blogspot.com). It's now posted to allow
anyone to embed a set of links from an opml file in their pages:
http://www.mylaszlo.com/cgi-bin/blogbox

Someone recently asked me about adapting this to display a slideshow
with an OPML file like this:

<outline text="Southeast Asia">
<outline text="Hmong girl" type="link"
url="/default_album/img01.jpg" target="" />
<outline text="Lisu infant" type="link"
url="/default_album/img02.jpg" target="" />
<outline text="Lisu mother" type="link"
url="/default_album/img03.jpg" target="" />
<outline text="Torajan farmer" type="link"
url="/default_album/img04.jpg" target="" />
</outline>

I didn't see other examples of specifying and displaying non-text
data in OPML, but it conforms to the spec and it seems like a nice
feature of an OPML viewer to display linked graphics in-line... or
is there a different XML format that would be better for this
application?

Sarah Allen
http://www.laszlosystems.com (work)
http://www.ultrasaurus.com (personal)