Extending SAML?

[Mike Tran <mttran@gmail.com>]

Hello All,

I was wondering if there was a way to extend SAML in a manner such  
that it can convey assertions for some arbitrary action performed by a  
web service.  We have various soap services that process documents and  
ideally after they are done processing these documents, we would like  
them to generate a SAML assertion asserting the domain specific   
action they performed.  Is this possible at?  I know SAML is typically  
used to assert acts of authentication and authorization, but can it be  
used in this particular case?  If not, can you suggest some other  
standardized specification that could potentially meet this  
requirement?  Thanks in advance.

Regards,
Mike