16. The method of claim 14 , wherein said functional expression representing a remote query to one of said at least one RAS represents a remote query which comprises at least one attribute, the method further comprising the processor in the PDP generating the remote query on the basis of a value of said at least one attribute.
16. The method of claim 14 , wherein said functional expression representing a remote query to one of said at least one RAS represents a remote query which comprises at least one attribute, the method further comprising the processor in the PDP generating the remote query on the basis of a value of said at least one attribute. 17. The method of claim 16 , wherein the PDP is communicatively coupled to at least two RASs and the remote query comprises at least one attribute whose value is remotely available only from a RAS other than said one RAS, the method further comprising the processor in the PDP retrieving an attribute value from said other RAS and then generating the remote query on the basis of the retrieved attribute value.