IfcGeometricProjectionEnum

Semantic definitions at the type

Type definition

Definition from IAI: The IfcGeometricProjectionEnum defines the various representation types that can be semantically distinguished. Often different levels of detail of the shape representation are controlled by the representation type.

GRAPH_VIEW: Geometric display representation that shows an abstract, often 1D element representation, e.g. representing a wall by its axis line.
SKETCH_VIEW: Geometric display representation that shows an abstract, often 2D element representation, e.g. representing a wall by its two foot print edges, surpressing any inner layer representation.
MODEL_VIEW: Geometric display representation that shows a full 3D element representation, e.g. representing a wall by its volumetric body.
PLAN_VIEW: Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its two foot print edges and the edges of all inner layers. The projection is shown in ground view as seen from above.
REFLECTED_PLAN_VIEW: Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its two foot print edges and the edges of all inner layers. The projection is shown in ground view as seen from below.
SECTION_VIEW: Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its two inner/outer edges and the edges of all inner layers, if the element is cut by the section line.
ELEVATION_VIEW: Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its bounding edges if the element is within an elevation view.
USERDEFINED: A user defined specification is given by the value of the UserDefinedTargetView attribute.
NOTDEFINED: No specification given.

HISTORY: New Type in Release IFC 2x Edition 2.

Enumeration definition

Constant	Description
GRAPH_VIEW
SKETCH_VIEW
MODEL_VIEW
PLAN_VIEW
REFLECTED_PLAN_VIEW
SECTION_VIEW
ELEVATION_VIEW
USERDEFINED
NOTDEFINED

Formal representations

XSD Specification

 <xs:simpleType name="IfcGeometricProjectionEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="graph_view"/>

   <xs:enumeration value="sketch_view"/>

   <xs:enumeration value="model_view"/>

   <xs:enumeration value="plan_view"/>

   <xs:enumeration value="reflected_plan_view"/>

   <xs:enumeration value="section_view"/>

   <xs:enumeration value="elevation_view"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcGeometricProjectionEnum = ENUMERATION OF (

 GRAPH_VIEW, 
 SKETCH_VIEW, 
 MODEL_VIEW, 
 PLAN_VIEW, 
 REFLECTED_PLAN_VIEW, 
 SECTION_VIEW, 
 ELEVATION_VIEW, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram