question: public RelationConstraint ( final String type , final String subType , final String pos , final String source , final String target ) { this . type = type ; this . subType = subType ; this . pos = pos ; if ( pos != null && pos . length ( ) > 0 ) { this . posChar = Character . toLowerCase ( pos . charAt ( 0 ) ) ; } else { this . posChar = '?' ; } this . source = source ; this . target = target ; }
target:  Instantiates a new relation constraint.