Each info object may have characteristics with {HEAD ~ attributes}, {TAIL ~ texts}, or hierarchies, and may function as a data source 
Each info object may have characteristics with { HEAD ~ attributes } , { TAIL ~ texts } , or hierarchies , and may function as a data source
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH