transformation RelationsToTraceClass(relations:{Relations, Templates, OCL, Ecore}, core:Ecore) {

  key EPackage{name};
  key EClass{ePackage, name};
  key EStructuralFeature{eContainingClass, name};

  top relation TransformationToPackage {
    domain relations rt : RelationalTransformation {
      name = rtn,
      nsPrefix = rtp,
      nsURI = rtu
    };
    enforce domain core p:EPackage{
      name = rtn,
      nsPrefix = rtp,
      nsURI = rtu
    };
    where {
      RelationToTraceClass(rt,p);
    }
  }

  relation RelationToTraceClass  {
    rn, vn:String;
    domain relations rt: RelationalTransformation {
      rule = r:Relation {
        name = rn,
        _domain = rd:RelationDomain {
          pattern = rdp:DomainPattern {
            templateExpression = t:ObjectTemplateExp {
              bindsTo = tv:Variable {
                name = vn,
                eType = c:EClass {}
              }
            }
          }
        }
      }
    };
    enforce domain core p:EPackage {
      eClassifiers = rc:EClass {
        name = 'T'+rn,
        eStructuralFeatures = a:EReference {
          name = vn,
          eType = c
        }
      }
    };
    where {
      SubTemplateToTraceClassProps(t, rc);
    }
  }

  relation SubTemplateToTraceClassProps {
    vn: String;
    domain relations t:ObjectTemplateExp {
      part = pt:PropertyTemplateItem {
        value = tp:ObjectTemplateExp {
          bindsTo = tv:Variable {
            name = vn,
            eType = c:EClass {}
          }
        }
      }
    };
    enforce domain core rc:EClass {
      eStructuralFeatures = a:EReference {
        name=vn,
        eType=c
      }
    };
    where {
      SubTemplateToTraceClassProps(tp, rc);
    }
  }
}