EAP 6.4 has a 1.1 xsd version for these subsystems, while WF 10 / EAP 7 has a 2.0. A quick glance leads me to believe the contents are the same except for the number. But the WF 10 / EAP 7 code will fail if a document with the 1.1 namespace is presented.
If the xsds are the same, likely this can be fixed simply by adding another case for 1.1 to the switch block that calls the 2.0 parser. Otherwise the 1.1 parser from the EAP 6 branch should be forward ported.