Class TIfcPropertyDependencyRelationship

Unit

CastleIfc

Declaration

type TIfcPropertyDependencyRelationship = class(TIfcResourceLevelRelationship)

Description

Whilst the IfcPropertyDependencyRelationship may be used to describe the dependency, and it may do so in terms of the expression of how the dependency operates, it is not possible through the current IFC model for the value of the related property to be actually derived from the value of the relating property. The determination of value according to the dependency is required to be performed by an application that can then use the Expression attribute to flag the form of the dependency.

Spec: https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcPropertyDependencyRelationship.htm

Hierarchy

• TObject
• TPersistent
• TComponent
• TIfcPersistent
• TIfcResourceLevelRelationship
• TIfcPropertyDependencyRelationship

Overview

Properties

	property DependingProperty: TIfcProperty read FDependingProperty write FDependingProperty;
	property DependantProperty: TIfcProperty read FDependantProperty write FDependantProperty;
	property Expression: TIfcText read FExpression write FExpression;

Description

Properties

	property DependingProperty: TIfcProperty read FDependingProperty write FDependingProperty;
The property on which the relationship depends.

	property DependantProperty: TIfcProperty read FDependantProperty write FDependantProperty;
The dependant property.

	property Expression: TIfcText read FExpression write FExpression;
Further describe the nature of the dependency relation.

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