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IfcRelProjectsElement

Definition from buildingSMART: The IfcRelProjectsElement is an objectified relationship between an element and one projection element that creates a modifier to the shape of the element. This relationship implies a Boolean operation of addition for the geometric bodies of the building element and the projection element.

The relationship is defined to be a 1:1 relationship, if a building element has more than one projection, several relationship objects have to be used, each pointing to a different projection element.

HISTORY New entity in Release IFC2x Edition 2.

EXPRESS specification:

ENTITY IfcRelProjectsElement
SUBTYPE OF ( IfcRelConnects);
RelatingElement  :  IfcElement;
RelatedFeatureElement  :  IfcFeatureElementAddition;
END_ENTITY;

Attribute definitions:

RelatingElement  :  Element at which a projection is created by the associated IfcProjectionElement.
RelatedFeatureElement  :  Reference to the IfcFeatureElementAddition that defines an addition to the volume of the element, by using a Boolean addition operation. An example is a projection at the associated element.

Inheritance graph

ENTITY IfcRelProjectsElement;
ENTITY IfcRoot;
GlobalId  :  IfcGloballyUniqueId;
OwnerHistory  :  IfcOwnerHistory;
Name  :  OPTIONAL IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcRelationship;
ENTITY IfcRelConnects;
ENTITY IfcRelProjectsElement;
RelatingElement  :  IfcElement;
RelatedFeatureElement  :  IfcFeatureElementAddition;
END_ENTITY;