In RequestType, when unmarshalling there's no auto-creation of environment attributes.
See Forum discussion: http://forum.herasaf.org/index.php/topic,142.0.html
See also Xacml Specification Chapter: B.8. Environment attributes
We should have a discussion, what exactly is meant in the specification with:
"This identifier indicates the current time at the context handler. In practice it is the time at which the request context was created"
I see two solutions:
a) when a request is unmarshalled (convienence by HERAS-AF) the Unmarshaller automatically adds the environment attributes if they aren't already present
b) environment attributes have to be provided in the xml which is unmarshalled