Proxy IdP can release the attribute Entitlement. This attribute is used for specification of particular services when a user has a right for it. His values are defined by agreement between the identity provider and the service provider. It´s consists of:
There is an example of attribute values and its description. The syntax can look like:
urn:geant:cesnet.cz:res:TestingCapabilitiesValue1#perun.cesnet.cz