IfcAxis2Placement

Semantic definitions at the type

Type definition

The IfcAxis2Placement allows for the choice of various placement entities.

NOTE Definition according to ISO/CD 10303-42:1992
This select type represents the placing of mutually perpendicular axes in two-dimensional or in threedimensional Cartesian space.
This select type enables entities requiring axis placement information to reference the axes without specifying the space dimensionality.

NOTE Type adapted from axis2_placement defined in ISO 10303-42.

HISTORY New type in IFC1.5

Select definition

Type	Description
IfcAxis2Placement2D
IfcAxis2Placement3D

Formal representations

XML Specification

 <xs:group name="IfcAxis2Placement">

  <xs:choice>

   <xs:element ref="ifc:IfcAxis2Placement2D"/>

   <xs:element ref="ifc:IfcAxis2Placement3D"/>

  </xs:choice>

 </xs:group>

EXPRESS Specification


TYPE IfcAxis2Placement = SELECT (

 IfcAxis2Placement2D, 
 IfcAxis2Placement3D);
END_TYPE;


 EXPRESS-G diagram