Figure 11 — Constraint Association
The concept Constraint Association describes how object or object types may have associated constraints indicating a qualitative objective or a quantitative metric to be met.
Constraints based on metrics are measurable, such that the status of a metric being valid is computer-interpretable. Metric constraints are based on simple conditional logic such as greater than a particular value or included within a specified list or table. Constraints may be combine multiple metrics using boolean logic such as AND, OR, XOR, or NOT.
Figure 11 illustrates an instance diagram.
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Figure 11 — Constraint Association |
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<EntityRule EntityName="IfcAppliedValue">
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<EntityRule EntityName="IfcAppliedValue" />
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<AttributeRule AttributeName="AppliedValue">
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<EntityRule EntityName="IfcLengthMeasure" />
<EntityRule EntityName="IfcReal" />
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<AttributeRule AttributeName="Name">
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<AttributeRule AttributeName="Benchmark">
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<EntityRule EntityName="IfcBenchmarkEnum" />
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<AttributeRule AttributeName="ReferencePath">
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<EntityRule EntityName="IfcReference">
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<AttributeRule AttributeName="TypeIdentifier" />
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<AttributeRule AttributeName="InnerReference" />
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<EntityRule EntityName="IfcObjectiveEnum" />
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<AttributeRule AttributeName="LogicalAggregator">
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<EntityRule EntityName="IfcLogicalOperatorEnum" />
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