Alexander Johannesen writes:
 > With Topic Maps it's been solved years and years ago, and it's the
 > part of it that the RDF world didn't think of until recently (and
 > applied their kludges). I'm not going to bang my gong on this, just
 > urge you to read up on PSIs.

Can't you just tell us?

 _/|_	 ___________________________________________________________________
/o ) \/  Mike Taylor    <[log in to unmask]>    http://www.miketaylor.org.uk
)_v__/\  "It takes a certain kind of bad writer to write badly sincerely"
	 -- Richard Sherbaniuk.