def selectFields(self,first=False):
        return first \
            and self._selectFieldsLeading \
            or self._selectFieldsNonLeading
Returns a list of column aliases for the SELECT SQL command used to 
dataset/ETHPy150Open RDFLib/rdfextras/rdfextras/store/FOPLRelationalModel/BinaryRelationPartition.py/BinaryRelationPartition.selectFields