Class Ifc4x1::IfcRelDefines

Nested Relationships

This class is a nested type of Struct Ifc4x1.

Inheritance Relationships

Base Type

Derived Types

Class Documentation

class Ifc4x1::IfcRelDefines : public Ifc4x1::IfcRelationship

A generic and abstract relationship which subtypes are used to:

assign a object type to an object occurrence assign a property set to an object instance assign a property set template to a property set

EXAMPLE Several instances of windows within the IFC project model may be of the same (catalogue or manufacturer) type. Thereby they share the same properties. This relationship is established by the subtype IfcRelDefinesByType of IfcRelDefines relationship assigning an IfcWindowStyle to multiple occurrences IfcWindow.

EXAMPLE The (same) property set, e.g. Pset_ProductManufacturerInfo, keeping the manufacturer name, label and production year of a product, can be assigned to one, or many instances of furnishing. This relationship is established by the subtype IfcRelDefinesByProperties of IfcRelDefines relationship assigning an IfcPropertySet to one or more instances of IfcFurnishingElement.

HISTORY New entity in IFC2x.

IFC2x4 CHANGE The attribute RelatedObjects had been demoted to the subtypes IfcRelDefinesByProperties and IfcRelDefinesByType.

Subclassed by Ifc4x1::IfcRelDefinesByObject, Ifc4x1::IfcRelDefinesByProperties, Ifc4x1::IfcRelDefinesByTemplate, Ifc4x1::IfcRelDefinesByType

Public Types

typedef IfcTemplatedEntityList<IfcRelDefines> list

Public Functions

const IfcParse::entity &declaration() const
IfcRelDefines(IfcEntityInstanceData *e)
IfcRelDefines(std::string v1_GlobalId, ::Ifc4x1::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description)

Public Static Functions

const IfcParse::entity &Class()