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