Definition from buildingSMART: The IfcConnectionGeometry
is used to describe the geometric and topological constraints that
facilitate the physical connection of two objects. It is envisioned as
a control that applies to the element connection relationships.
NOTE The element
connection relationship normally provides for a logical connection
information, by referencing the relating and related elements. If in
addition an IfcConnectionGeometry is provided,
physical connection information is given by specifying exactly where at
the relating and related element the element connection occurs. Using the eccentricity subtypes, the
connection can also be described when there is a physical distance (or
eccentricity) between the connection elements.
The IfcConnectionGeometry allows for the
provision of connection constraints between geometric and topological
elements, the following connection geometry/topology types are in scope:
- point | vertex point,
- curve | edge curve,
- surface | face surface,
- profile - NOTE the
profile (or port) connection type is deprecated since Release IFC2x
New entity in IFC Release 1.5.
IFC2x Edition 3 CHANGE
The definition of the subtypes has been enhanced by allowing either
geometric representation items (point | curve | surface) or topological
representation items with associated geometry (vertex point | edge
curve | face surface).