Groves and/or Xlink Java API ?

Can anyone please point me in the direction of one of these?

Failing that, I'd appreciate suggestions on a simple way of modelling some
aspects of groves in Java - the bits I'm interested in are those related to
structure : essentially just the tree(s), irefs and urefs. I'm guessing that
this should be do-able using DOM+XLink with a bit of tweaking to make the
interfaces friendly, but I don't want to go reinventing the wheel (again).

Cheers,
Danny.

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Danny Ayers
<stuff> http://www.isacat.net </stuff>