anyone familiar with a xml format for describing keyboard mappings?

Hi,

I'm just wondering if anyone knows of an xml format for describing
Keyboard layouts and mappings. The only thing I can think of is the
xml format used by SC unipad but that is not standardised and at any
rate I would like not having to program where to place a key, I would
much rather just have a declarative format that tells me where the key
is placed.

Cheers,
Bryan Rasmussen