XForms 1.1 spec - section 11.1 - targetref - minor clarifications needed

Dear Editor/WG,

I think some clarifications are needed in description of the targetref 
attribute in section 11.

1. What should happen if the targetref resolves to an empty nodeset? (And 
specifically, with respect to instance attribute presence :).

2. What should happen if targetref points to a 'wrong' instance (given by 
the instance attribute)?

Ignoring instance attribute if targetref if present (and resolves to an 
non-empty nodeset?) or even its deprecation seems like a reasonable 
outcome.

Thanks,

Vlad Trakhtenberg,
IBM, Victoria Software Lab