role mapping rules when context is broken

Hi. I don't see whether UAIG addresses the case when role was used in a
wrong context [1], for example, if parent of role="gridcell" is not
role="row". In this case IAccessibleTableCell interface is not applicable
for this gridcell accessible, so should the accessible have GRIDCELL role
and should the element be accessible at all?

"Including elements in the tree" section [2] requires to include elements
whoes semantcis answers to the context, but the opposite case seems to be
not addressed in the spec.

Thanks.
Alex.

[1] http://www.w3.org/WAI/PF/aria-implementation/#mapping_role
[2] http://www.w3.org/WAI/PF/aria-implementation/#include_elements