Register for {TAIL ~ and method} of providing contact information for {HEAD ~ a communications unit} identified by a uniform resource name 
Register for { TAIL ~ and method } of providing contact information for { HEAD ~ a communications unit } identified by a uniform resource name
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH