HRXML syntax reference

Hello,

I'm looking for an authoritative reference or manual for the HRXML 
format (Human Resource XML).

Since I've been looking for such a source now since about six months, 
I'd really appreciate if someone could help me with that.

If someone knew a tool to validate existing HRXML documents online or 
offline, this was also a great help for me!

Thanks in advance,


Tobse
http://www.jerseycheapest.com