{TAIL ~ The semantic object data model} is defined by one or more semantic objects, each of which includes one or more attributes that describe a characteristic of {HEAD ~ the semantic objects} 
{ TAIL ~ The semantic object data model } is defined by one or more semantic objects , each of which includes one or more attributes that describe a characteristic of { HEAD ~ the semantic objects }
TAIL TAIL TAIL 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 OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD