|Item||SPF||XML||Change||Description||IFC2x3 to IFC4|
|IfcBoundedSurface||MODIFIED||Instantiation changed to ABSTRACT. |
An IfcBoundedSurface is a surface of finite area.
NOTE Definition according to ISO/CD 10303-42:1992
A bounded surface is a surface of finite area with identifiable boundaries.
NOTE Entity adapted from bounded_surface defined in ISO10303-42.
HISTORY New entity in IFC2x
IFC4 CHANGE Entity made abstract.
|S[0:1]||Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.
IFC2x3 CHANGE The inverse attribute LayerAssignments has been added.
IFC4 CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
|S[0:1]||Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.
IFC2x3 CHANGE The inverse attribute StyledByItem has been added.
|IfcDimensionCount||The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item.
IFC4 CHANGE Derived attribute promoted from subtypes.