Topic Maps,DAML, RDF, and others?

["Williams, Tim" <twilliams@mcia.osis.gov>]

Could someone describe these in comparison to one another?  DAML seems to be
built on top of RDF? I'm curious as to when one would use a Topic Map v/s
DAML v/s RDF to describe their data and relationships to other data.  Are
Topic Maps and DAML competing approaches? 

and one last set of questions, Topic Maps appear to be ISO standards instead
of w3c, why? and should this make a difference in deciding which to go with?


ok, one more, is anyone currently have a system using these or other
metadata markup languages (besides HTML meta tags) and care to describe
their experiences so far?

Thanks,
--tim