Database schema dumper

I'd like to dump a database schema to a file, probably XML but
anything reasonable is good enough.  By "schema", I don't mean the
narrow postgres keyword, but rather the table names, columns,
foreignkeys, triggers, constraints, etc.

I'd really like something that could work for other databases too,
including O-----, M----, etc.  But that might be asking too much.

A quick google for variations on "dump database schema" didn't find
much.

Whether it be a CPAN module, Java class, etc, or a standalone program,
none of that matters much.

--
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     Felix Finch: scarecrow repairman & rocket surgeon / felix@crowfix.com
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I've found a solution to Fermat's Last Theorem but I see I've run out of room o