Title: misleading text in sect 2.3

Description: the text suggests that the schema can be found by dereferencing the namespace URI. This is not quite true, since what you get when you dereference the namespace URI is the RDDL document. Also, it suggests, incorrectly, that it is the XML 1.0 namespace, not the WS-Policy 1.5 namespace URI.

Justification: see above

Type: editorial

Proposal: 

In section 2.3 change:
A normative XML Schema [XML Schema Structures, XML Schema Datatypes] document can be obtained by dereferencing the XML namespace URI.

To:
A normative XML Schema [XML Schema Structures, XML Schema Datatypes] document can be obtained indirectly by dereferencing the RDDL document at the WS-Policy 1.5 namespace URI.