Service Requests
n A UA requests a service
by type, possibly with a naming_authority
from a particular scope
by predicate (a boolean query based on service attributes)
n Example:
service type = service:printer:lpr
scope list = Engineering, Marketing
predicate = (&(location-description = Printer Room)
                     (duplex-mode = duplex))
n Representation: <service-type[.na],scope,[query]>