The section 11.2.1 includes the following text:
11.2.1 Conforming XForms Processors
       All XForms Processors must support the required portions of the specifications normatively listed as references (      B References).
       XForms Basic Processors must implement all required features labeled Basic.
       XForms Full Processors must implement all required features.
But the normative references have features labeled "Basic" (or "required" for that matter).

John J. Barton          email:
MS 1U-17  Hewlett-Packard Labs                                   
1501 Page Mill Road              phone: (650)-236-2888
Palo Alto CA  94304-1126         FAX:   (650)-857-5100