2007/5/11, Joe Shaw <<a href="mailto:joe@joeshaw.org">joe@joeshaw.org</a>>:<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi, On 5/11/07, Mikkel Kamstrup Erlandsen <<a href="mailto:mikkel.kamstrup@gmail.com">mikkel.kamstrup@gmail.com</a>> wrote: > Basically we have four desktop ontologies that I know of: > > Strigi: > <a href="http://websvn.kde.org/trunk/kdesupport/strigi/src/streamanalyzer/fieldproperties/">http://websvn.kde.org/trunk/kdesupport/strigi/src/streamanalyzer/fieldproperties/</a> > Tracker : > <a href="http://svn.gnome.org/viewcvs/tracker/trunk/data/services/"> http://svn.gnome.org/viewcvs/tracker/trunk/data/services/</a> > Spotlight: > <a href="http://developer.apple.com/documentation/Carbon/Reference/MetadataAttributesRef/index.html">http://developer.apple.com/documentation/Carbon/Reference/MetadataAttributesRef/index.html </a> The plan with Beagle was always to use existing ontologies where they exist.. of course, we never really got around to doing that, which is why a lot of them that aren't covered by Dublin Core are in the "fixme" namespace. I still think this is probably the way to go, especially if we have a desire to easily transition to or from RDF.  Tracker's seems like the closest to this.</blockquote><div> I'm not sure I understand you. What exactly do you mean Trackers ontology is close to? And is this good or bad? :-) </div> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I haven't been following this thread super closely.  Why define these in .desktop-like files rather than in some sort of documented specification?  Code is what ultimately will be setting these, so it will have to obey them. </blockquote><div> Because we could allow 3rd parties to install their own ontologies so we wouldn't have to cover everything known to man. With machine a readable ontology you could also create tools to visualize the ontology - they tend to be complex beasts... I have some more reasons in the mail from Fabrice I just replied to... Cheers, Mikkel </div> </div>