|modifications||attributes BenchmarkValues definition||Changed from IfcMetric to list[1:?] of IfcConstraint|
|modifications||attributes ResultValues definition||Changed from IfcMetric to IfcLogicalOperatorEnum|
|modifications||attributes ResultValues name||Changed from ResultValues to LogicalAggregator|
An IfcObjective captures qualitative information for an objective-based constraint.
IfcObjective is a subtype of IfcConstraint and may be associated with any subtype of IfcRoot through the IfcRelAssociatesConstraint relationship in the IfcControlExtension schema, or may be associated with IfcProperty by IfcResourceConstraintRelationship.
The aim of IfcObjective is to specify the purpose for which the constraint is applied and to capture the benchmark metrics of the constraint.
HISTORY New entity in IFC2.0.
|1||Name||IfcLabel||A human-readable name to be used for the constraint.|
|2||Description||OPTIONAL IfcText||A human-readable description that may apply additional information about a constraint.|
|3||ConstraintGrade||IfcConstraintEnum||Enumeration that qualifies the type of constraint.|
|4||ConstraintSource||OPTIONAL IfcLabel||Any source material, such as a code or standard, from which the constraint originated.|
|5||CreatingActor||OPTIONAL IfcActorSelect||Person and/or organization that has created the constraint.|
|6||CreationTime||OPTIONAL IfcDateTime||Time when information specifying the constraint instance was created.|
|7||UserDefinedGrade||OPTIONAL IfcLabel||Allows for specification of user defined grade of the constraint beyond the enumeration values (hard, soft, advisory) provided by ConstraintGrade attribute of type IfcConstraintEnum. |
When a value is provided for attribute UserDefinedGrade in parallel the attribute ConstraintGrade shall have enumeration value USERDEFINED.
|HasExternalReferences||SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects||Reference to an external references, e.g. library, classification, or document information, that are associated to the constraint.|
> IFC4 CHANGE New inverse attribute.
|PropertiesForConstraint||SET [0:?] OF IfcResourceConstraintRelationship FOR RelatingConstraint||Reference to the properties to which the constraint is applied.|
|8||BenchmarkValues||OPTIONAL LIST [1:?] OF IfcConstraint||A list of nested constraints.|
> IFC2X4 CHANGE Modified to be a LIST of nested constraints, which replaces the former IfcConstraintAggregationRelationship.
|9||LogicalAggregator||OPTIONAL IfcLogicalOperatorEnum||Enumeration that identifies the logical type of aggregation for the benchmark metrics.|
> IFC2X4 CHANGE This attribute replaces replaces the former ResultValues attribute and indicates the aggregation behavior formerly defined at IfcConstraintAggregationRelationship.
|10||ObjectiveQualifier||IfcObjectiveEnum||Enumeration that qualifies the type of objective constraint.|
|11||UserDefinedQualifier||OPTIONAL IfcLabel||A user defined value that qualifies the type of objective constraint when ObjectiveQualifier attribute of type IfcObjectiveEnum has value USERDEFINED.|
ENTITY IfcObjective SUBTYPE OF (IfcConstraint); BenchmarkValues : OPTIONAL LIST [1:?] OF IfcConstraint; LogicalAggregator : OPTIONAL IfcLogicalOperatorEnum; ObjectiveQualifier : IfcObjectiveEnum; UserDefinedQualifier : OPTIONAL IfcLabel; WHERE WR21 : (ObjectiveQualifier <> IfcObjectiveEnum.USERDEFINED) OR ((ObjectiveQualifier = IfcObjectiveEnum.USERDEFINED) AND EXISTS(SELF\IfcObjective.UserDefinedQualifier)); END_ENTITY;