184.108.40.206.1 Semantic definition
An IfcMetric is used to capture quantitative resultant metrics that can be applied to objectives.
IfcMetric 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 IfcMetric is to capture the quantitative aspects of a constraint.
220.127.116.11.2 Entity inheritance
A human-readable name to be used for the constraint.
A human-readable description that may apply additional information about a constraint.
Enumeration that qualifies the type of constraint.
Any source material, such as a code or standard, from which the constraint originated.
Person and/or organization that has created the constraint.
Time when information specifying the constraint instance was created.
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.
|PropertiesForConstraint||SET [0:?] OF IfcResourceConstraintRelationship FOR RelatingConstraint||
Reference to the properties to which the constraint is applied.
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Enumeration that identifies the type of benchmark data.
Reference source for data values.
If DataValue refers to an IfcTable, this attribute identifies the relevant column identified by IfcTableColumn.Identifier.
The value to be compared on associated objects. A null value indicates comparison to null.
Optional path to an attribute to be constrained on associated objects. If provided, the metric may be validated by resolving the path to the current value on associated object(s), and comparing such value with DataValue according to the Benchmark.
18.104.22.168.4 Formal representation
ENTITY IfcMetric SUBTYPE OF (IfcConstraint); Benchmark : IfcBenchmarkEnum; ValueSource : OPTIONAL IfcLabel; DataValue : OPTIONAL IfcMetricValueSelect; ReferencePath : OPTIONAL IfcReference; END_ENTITY;