IfcPropertyTemplate

BACnet MVD

#### IfcPropertyTemplate

Natural language names

| Merkmal - Vorlage
| Property Template
| Modèle de propriété

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcPropertyTemplate |  |  | ADDED |

##### Semantic definitions at the entity

Entity definition

The IfcPropertyTemplate is an abstract supertype comprising the templates for all dynamically extensible properties, either as an IfcComplexPropertyTemplate, or an IfcSimplePropertyTemplate. These templates determine the structure of:

- in case of IfcComplexPropertyTemplate
  - an IfcComplexProperty
  - an IfcPhysicalComplexQuantity
- in case of IfcSimplePropertyTemplate
  - a subtype of IfcSimpleProperty
  - a subtype of IfcPhysicalSimpleQuantity

The individual property templates are interpreted according to their Name attribute and may have a predefined property type, property unit, and property data type. A template however shall not have measure values, or quantity values assigned.

> NOTE Property templates can form part of a property library used and attached as part of a project library. In general the IfcPropertySetTemplate, containing the subtypes of IfcPropertyTemplate would be directly linked to the IfcProjectLibrary.

> HISTORY New entity in IFC4.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
| PartOfComplexTemplate | IfcComplexPropertyTemplate @HasPropertyTemplates | S[0:?] | Reference to a complex property templates. It should only be provided, if the PropertyType of the referenced complex property template is set to COMPLEX. |  | X
| PartOfPsetTemplate | IfcPropertySetTemplate @HasPropertyTemplates | S[0:?] | Reference to the IfcPropertySetTemplate that defines the scope for the IfcPropertyTemplate. A single IfcPropertyTemplate can be defined within the scope of zero, one or many IfcPropertySetTemplate'. |  | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | X

2

OwnerHistory

IfcOwnerHistory

?

Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

> NOTE only the last modification in stored - either as addition, deletion or modification.

> IFC4 CHANGE The attribute has been changed to be OPTIONAL.

X

X

3 | Name | IfcLabel | ? | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X | X
4 | Description | IfcText | ? | Optional description, provided for exchanging informative comments. |  | X
IfcPropertyDefinition
| HasContext | IfcRelDeclares @RelatedDefinitions | S[0:1] |  |  | X
| HasAssociations | IfcRelAssociates @RelatedObjects | S[0:?] | Reference to the relationship IfcRelAssociates and thus to those externally defined concepts, like classifications, documents, or library information, which are associated to the property definition. |  | X
IfcPropertyTemplateDefinition
IfcPropertyTemplate
| PartOfComplexTemplate | IfcComplexPropertyTemplate @HasPropertyTemplates | S[0:?] | Reference to a complex property templates. It should only be provided, if the PropertyType of the referenced complex property template is set to COMPLEX. |  | X
| PartOfPsetTemplate | IfcPropertySetTemplate @HasPropertyTemplates | S[0:?] | Reference to the IfcPropertySetTemplate that defines the scope for the IfcPropertyTemplate. A single IfcPropertyTemplate can be defined within the scope of zero, one or many IfcPropertySetTemplate'. |  | X

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Formal representations

XML Specification
`<xs:element name="IfcPropertyTemplate" type="ifc:IfcPropertyTemplate" abstract="true" substitutionGroup="ifc:IfcPropertyTemplateDefinition" nillable="true"/>
<xs:complexType name="IfcPropertyTemplate" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcPropertyTemplateDefinition"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcPropertyTemplate
ABSTRACT SUPERTYPE OF(ONEOF(IfcComplexPropertyTemplate, IfcSimplePropertyTemplate))
SUBTYPE OF (IfcPropertyTemplateDefinition);
INVERSE
PartOfComplexTemplate : SET [0:?] OF IfcComplexPropertyTemplate FOR HasPropertyTemplates;
PartOfPsetTemplate : SET [0:?] OF IfcPropertySetTemplate FOR HasPropertyTemplates;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcComplexPropertyTemplate IfcPropertySetTemplate

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