Definition from IAI: The enumeration defines whether the
definition of a profile shape shall be geometrically resolved into a curve or
into a surface.
HISTORY: New type in IFC Release 1.5.
Enumeration values:
Curve
The resulting geometric item is of type curve and
closed (with the only exception of the curve created by the
IfcArbitraryOpenProfileDef which resolves into an open curve). The
resulting geometry after applying a sweeping operation is a swept surface. This
can be used to define shapes with thin sheets, such as ducts, where the
thickness is not appropriate for geometric representation.
Area
The resulting geometric item is of type surface.
The resulting geometry after applying a sweeping operation is a swept solid
with defined volume.
