does SWS standardization need to wait for a rule language?

Hi all,
I've thought about this in the context of the latest discussions about
the next steps of SWS standardization:

A big part of SWS descriptions is ontologies, and we have OWL for that.
But another significant part is various logical expressions
(preconditions, effects) which can't be expressed in OWL. There's the
RIF working group that I expect to give us a useful rule language for
that, but what about the scheduling?

I have a feeling that we may need to wait until a useful RIF spec is in
Last Call at least before new work starts that expects to use it. Or
could maybe SPARQL be used somehow?

Any opinions?
Jacek