IfcPreDefinedProperties

BACnet MVD

#### IfcPreDefinedProperties

Natural language names

| Vordefinierte Merkmale
| Pre Defined Properties
| Propriétés prédéfinies

Change log

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

##### Semantic definitions at the entity

Entity definition

The IfcPreDefinedProperties is an abstract supertype of all predefined property collections that have explicit attributes, each representing a property. Instantiable subtypes are assigned to specific characterised entities.

> HISTORY New entity in IFC4.

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcPropertyAbstraction

HasExternalReferences

IfcExternalReferenceRelationship
@RelatedResourceObjects

S[0:?]

Reference to an external reference, e.g. library, classification, or document information, that is associated to the property definition.

> IFC4 CHANGE New inverse attribute.

X

IfcPreDefinedProperties

##### Formal representations

XML Specification
`<xs:element name="IfcPreDefinedProperties" type="ifc:IfcPreDefinedProperties" abstract="true" substitutionGroup="ifc:IfcPropertyAbstraction" nillable="true"/>
<xs:complexType name="IfcPreDefinedProperties" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcPropertyAbstraction"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcPreDefinedProperties
ABSTRACT SUPERTYPE OF(ONEOF(IfcReinforcementBarProperties, IfcSectionProperties, IfcSectionReinforcementProperties))
SUBTYPE OF (IfcPropertyAbstraction);
END_ENTITY;

EXPRESS-G diagram

`

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