storing XML and querying

I'm looking into methods to store XML docs for query and retrieval
across all the docs or subsets.
I've looked over a couple of options and may end up creating relations
with the data.
Are there any "Super" solutions that I might be overlooking.

Also, this article claims that these functions are part of the
distribution, but I don't see it in the contribs:

http://www.throwingbeans.org/postgresql_and_xml_updated.html

Anyone know the status here.

Thanks

Matt Terenzio
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