The ALR cross references this URN to find {HEAD ~ a URL} for {TAIL ~ the target}, such as the URL for the VLR 105 and contacts the VLR to start a session with the target device 
for
The ALR cross references this URN to find { HEAD ~ a URL } for { TAIL ~ the target } , such as the URL for the VLR 105 and contacts the VLR to start a session with the target device
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH