Namespace Xbim.Ifc2x3.ConstraintResource Classes IfcConstraint IfcConstraintAggregationRelationship IfcConstraintClassificationRelationship IfcConstraintRelationship IfcMetric IfcObjective IfcPropertyConstraintRelationship Interfaces IfcMetricValueSelect Enums IfcBenchmarkEnum IfcConstraint.IfcConstraintClause IfcConstraintAggregationRelationship.IfcConstraintAggregationRelationshipClause IfcConstraintEnum IfcConstraintRelationship.IfcConstraintRelationshipClause IfcLogicalOperatorEnum IfcObjective.IfcObjectiveClause IfcObjectiveEnum