IFC 4.3.0.1 (IFC4X3) development

4.6.2.6 Property Sets for Types

The concept template Property Sets for Objects describes how an object type can be related to a single or multiple property sets. A property set contains a single or multiple properties. The data types of an individual property are single value, enumerated value, bounded value, table value, reference value, list value, and combination of property occurrences.

The property values assigned to an object type apply equally to all occurrences of this object type, see concept Object Typing, unless it is overridden by a property with same name within a property set with the same name at an individual object occurrence.

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcTypeObject IfcTypeObject 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ApplicableOccurrence [0:1] 6. HasPropertySets [1:?]      Types [0:1] IfcPropertySet IfcPropertySet 1. GlobalId [1:1] 2. OwnerHistory [0:1] PsetName 3. Name [0:1] 4. Description [0:1]      HasContext [0:1]      HasAssociations [0:?]      DefinesType [0:?]      IsDefinedBy [0:?]      DefinesOccurrence [0:?] 5. HasProperties [1:?] IfcTypeObject:HasPropertySets1->IfcPropertySet:IfcPropertySet0 IfcPropertySingleValue IfcPropertySingleValue      HasExternalReferences [0:?] 1. Name [1:1] 2. Specification [0:1]      PartOfPset [0:?]      PropertyForDependance [0:?]      PropertyDependsOn [0:?]      PartOfComplex [0:?]      HasConstraints [0:?]      HasApprovals [0:?] 3. NominalValue [0:1] 4. Unit [0:1] IfcPropertySet:HasProperties1->IfcPropertySingleValue:IfcPropertySingleValue0 IfcPropertyBoundedValue IfcPropertyBoundedValue      HasExternalReferences [0:?] 1. Name [1:1] 2. Specification [0:1]      PartOfPset [0:?]      PropertyForDependance [0:?]      PropertyDependsOn [0:?]      PartOfComplex [0:?]      HasConstraints [0:?]      HasApprovals [0:?] 3. UpperBoundValue [0:1] 4. LowerBoundValue [0:1] 5. Unit [0:1] 6. SetPointValue [0:1] IfcPropertySet:HasProperties1->IfcPropertyBoundedValue:IfcPropertyBoundedValue0 IfcPropertyEnumeratedValue IfcPropertyEnumeratedValue      HasExternalReferences [0:?] 1. Name [1:1] 2. Specification [0:1]      PartOfPset [0:?]      PropertyForDependance [0:?]      PropertyDependsOn [0:?]      PartOfComplex [0:?]      HasConstraints [0:?]      HasApprovals [0:?] 3. EnumerationValues [1:?] 4. EnumerationReference [0:1] IfcPropertySet:HasProperties1->IfcPropertyEnumeratedValue:IfcPropertyEnumeratedValue0 IfcPropertyListValue IfcPropertyListValue      HasExternalReferences [0:?] 1. Name [1:1] 2. Specification [0:1]      PartOfPset [0:?]      PropertyForDependance [0:?]      PropertyDependsOn [0:?]      PartOfComplex [0:?]      HasConstraints [0:?]      HasApprovals [0:?] 3. ListValues [1:?] 4. Unit [0:1] IfcPropertySet:HasProperties1->IfcPropertyListValue:IfcPropertyListValue0 IfcPropertyTableValue IfcPropertyTableValue      HasExternalReferences [0:?] 1. Name [1:1] 2. Specification [0:1]      PartOfPset [0:?]      PropertyForDependance [0:?]      PropertyDependsOn [0:?]      PartOfComplex [0:?]      HasConstraints [0:?]      HasApprovals [0:?] 3. DefiningValues [1:?] 4. DefinedValues [1:?] 5. Expression [0:1] 6. DefiningUnit [0:1] 7. DefinedUnit [0:1] 8. CurveInterpolation [0:1] IfcPropertySet:HasProperties1->IfcPropertyTableValue:IfcPropertyTableValue0 Single_Value Single Value IfcPropertySingleValue->Single_Value Bounded_Value Bounded Value IfcPropertyBoundedValue->Bounded_Value Enumerated_Value Enumerated Value IfcPropertyEnumeratedValue->Enumerated_Value List_Value List Value IfcPropertyListValue->List_Value Table_Value Table Value IfcPropertyTableValue->Table_Value
Figure 4.6.2.6.A

General Usage

ApplicableEntity
IfcTypeObject
Table 4.6.2.6.B

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