[Tracker] Venus tracker?

[Sam Ruby <rubys intertwingly net>]

I'm looking to add better search support to Planet Venus[1].  I first 
heard about tracker as it is the default for Ubuntu Gutsy.  I see in the 
documentation that there is a "user definable object store (for things 
like notes, playlists, contacts, etc) complete with user-definable 
properties".

Taking a quick peek at the documentation, I see that the xml_filter uses 
xsltproc to throw away all of the tags.  I'd like to provide a different 
filter that identifies some tags as user-definable properties.

If somebody can point me in the right direction, I'd appreciate it.

- Sam Ruby

[1] http://www.intertwingly.net/code/venus/