XACML Samples

Hi,
Could anybody provide me with some XACML samples?
I am working in checking inconsistency in XACML policies, and I need 
more real examples for tests.
Does anybody know if there is already any research or work XACML on 
policies validation?

-- 
Mahdi MANKAI
Master Student
Université du Québec en Outaouais
Local B-2003
Tel. (819) 595 3900 Ext. 1705