5.1.3.40 IfcRelDefinesByProperties

Définition par propriétés
Definiert durch Merkmale - Relation: Relation zwischen einem Objekt und dessen beschreibenden Merkmalen

The objectified relationship IfcRelDefinesByProperties defines the relationships between property set definitions and objects. Properties are aggregated in property sets. Property sets can be either directly assigned to occurrence objects using this relationship, or assigned to an object type and assigned via that type to occurrence objects.

The IfcRelDefinesByProperties is a 1-to-N relationship, as it allows for the assignment of one property set to a single or to many objects. Those objects then share the same property definition.

HISTORY  New entity in IFC2.0. Has been renamed from IfcRelAssignsProperties in IFC2x.
IFC4 CHANGE  The attribute RelatedObjects had been demoted from the supertype IfcRelDefines to IfcRelDefinesByProperties.

XSD Specification:

 <xs:element name="IfcRelDefinesByProperties" type="ifc:IfcRelDefinesByProperties" substitutionGroup="ifc:IfcRelDefines" nillable="true"/>
 <xs:complexType name="IfcRelDefinesByProperties">
  <xs:complexContent>
   <xs:extension base="ifc:IfcRelDefines">
    <xs:sequence>
     <xs:element name="RelatedObjects" type="ifc:IfcObjectDefinition" nillable="true" maxOccurs="1"/>
     <xs:element name="RelatingPropertyDefinition">
      <xs:complexType>
       <xs:group ref="ifc:IfcPropertySetDefinitionSelect"/>
      </xs:complexType>
     </xs:element>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcRelDefinesByProperties
SUBTYPE OF IfcRelDefines;
RelatedObjects : SET [1:1] OF IfcObjectDefinition;
RelatingPropertyDefinition : IfcPropertySetDefinitionSelect;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

RelatedObjects : Reference to the objects (or single object) to which the property definition applies.
IFC4 CHANGE  Data type promoted from subtype IfcObject.
RelatingPropertyDefinition : Reference to the property set definition for that object or set of objects.

Inheritance Graph:

ENTITY IfcRelDefinesByProperties
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcRelationship
ENTITY IfcRelDefines
ENTITY IfcRelDefinesByProperties
RelatedObjects : SET [1:1] OF IfcObjectDefinition;
RelatingPropertyDefinition : IfcPropertySetDefinitionSelect;
END_ENTITY;

Examples:

Link to this page  Link to this page