IFC 4.3.x development

5.4.3.52 IfcRelPositions

Change log

IFC4X2

added

5.4.3.52.1 Semantic definitions at the entity

An IfcRelPositions relationship defines the relationship that positions a product related to a positioning element..

5.4.3.52.1 Attributes

#Attribute Type Description
IfcRoot
1GlobalId IfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world.
2OwnerHistory OPTIONAL IfcOwnerHistoryAssignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

> NOTEĀ  only the last modification in stored - either as addition, deletion or modification.

> IFC4 CHANGEĀ  The attribute has been changed to be OPTIONAL.
3Name OPTIONAL IfcLabel Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.
4Description OPTIONAL IfcText Optional description, provided for exchanging informative comments.
IfcRelationship
IfcRelConnects
IfcRelPositions
5RelatingPositioningElementIfcPositioningElement Positioning element defining the source of the relative position.
6RelatedProducts SET [1:?] OF IfcProduct Relatively positioned product.

5.4.3.52.2 Entity inheritance

dot_inheritance IfcRelPositions IfcRelPositions IfcRelConnects IfcRelConnects IfcRelPositions->IfcRelConnects IfcRelConnects_children 15 more... IfcRelConnects_children->IfcRelConnects IfcRelationship IfcRelationship IfcRelConnects->IfcRelationship IfcRelationship_children 5 more... IfcRelationship_children->IfcRelationship IfcRoot IfcRoot IfcRelationship->IfcRoot IfcObjectDefinition IfcObjectDefinition IfcObjectDefinition->IfcRoot IfcPropertyDefinition IfcPropertyDefinition IfcPropertyDefinition->IfcRoot

5.4.3.52.3 Definitions applying to General Usage

5.4.3.52.3.1 Identity

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

5.4.3.52.3.2 Revision Control

Ownership, history, and merge state is captured using IfcOwnerHistory.

5.4.3.52.4 Formal representations

ENTITY IfcRelPositions
 SUBTYPE OF (IfcRelConnects);
	RelatingPositioningElement : IfcPositioningElement;
	RelatedProducts : SET [1:?] OF IfcProduct;
 WHERE
	NoSelfReference : SIZEOF(QUERY(temp <* RelatedProducts | RelatingPositioningElement :=: temp)) = 0;
END_ENTITY;