IfcBooleanOperand

Semantic definitions at the type

Type definition

Select type including all geometric representation items which may participate in a Boolean operation to form a CSG solid. It includes solid models, half space solids and CSG primitives. Boolean results can also be used as operands thus enabling nested Boolean operations.

NOTE Definition from ISO 10303-42:
This select type identifies all those types of entities which may participate in a boolean operation to form a CSG solid.

NOTE Corresponding STEP type boolean_operand defined in ISO 10303-42.

HISTORY New type in IFC1.5.1.

IFC4 CHANGE The item IfcTessellatedFaceSet has been added to the select.

Select definition

Type	Description
IfcSolidModel
IfcHalfSpaceSolid
IfcBooleanResult
IfcCsgPrimitive3D
IfcTessellatedFaceSet

Formal representations

XML Specification

 <xs:group name="IfcBooleanOperand">

  <xs:choice>

   <xs:element ref="ifc:IfcBooleanResult"/>

   <xs:element ref="ifc:IfcCsgPrimitive3D"/>

   <xs:element ref="ifc:IfcHalfSpaceSolid"/>

   <xs:element ref="ifc:IfcSolidModel"/>

   <xs:element ref="ifc:IfcTessellatedFaceSet"/>

  </xs:choice>

 </xs:group>

EXPRESS Specification


TYPE IfcBooleanOperand = SELECT (

 IfcSolidModel, 
 IfcHalfSpaceSolid, 
 IfcBooleanResult, 
 IfcCsgPrimitive3D, 
 IfcTessellatedFaceSet);
END_TYPE;


 EXPRESS-G diagram

Item	SPF	XML	Change	Description
IFC4 Addendum 2
IfcBooleanOperand
IfcTessellatedFaceSet			ADDED

	Boolescher Operand
	Boolean Operand
	Opérande booléen