This invention relates to unique object identification and, in particular, to {HEAD ~ methods} and systems for identifying and interacting with {TAIL ~ objects} 
This invention relates to unique object identification and , in particular , to { HEAD ~ methods } and systems for identifying and interacting with { TAIL ~ objects }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL