How would I catalog/group Enterprise, Domain or Application level services when published to the UDDI registry? And, how would I search for ALL of these grouped web services once they are published?

Let's say, I have several enterprise level (e.g. payroll system) web services. How would I classify them in one of these categories. Is this information defined in the 'business Service' part of the data structure?

Finally, is it possible to reference an external URL for web service documentation (e.g. wiki)? This documentation will tell, what the service does, what parameters it takes and so forth.

Thanks.