code: private char getRelationFromRels(char builtForRel, char glossRel) {
          if (builtForRel == IMappingElement.EQUIVALENCE) {
              return glossRel;
          }
          if (builtForRel == IMappingElement.LESS_GENERAL) {
              if ((glossRel == IMappingElement.LESS_GENERAL) || (glossRel == IMappingElement.EQUIVALENCE)) {
                  return IMappingElement.LESS_GENERAL;
              }
          }
          if (builtForRel == IMappingElement.MORE_GENERAL) {
              if ((glossRel == IMappingElement.MORE_GENERAL) || (glossRel == IMappingElement.EQUIVALENCE)) {
                  return IMappingElement.MORE_GENERAL;
              }
          }
          return IMappingElement.IDK;
      }
docs: Decides which relation to return as a function of relation for which extended gloss was built.
  
  @param builtForRel relation for which the gloss was built
  @param glossRel    relation
  @return less general, more general or IDK relation