Conformance for processors

Currently we have 


 "For any conforming grammar and any input, processors must:"


and then a list of conformance clauses.


It seems to me reasonable that we require that the processor establish that 
the grammar is conforming first.


So:


"For any supplied grammar and input, processors must:


* Establish that the grammar is conforming, and report otherwise that it is 
not.
* If the grammar is conforming, parse the input using the grammar, and ..."


We also need to decide what conformance criteria for the processor we want 
to include about non-valid XML names and character content.


Steven