Creates an application instance within an associated model.

A created application instance represented with its pointer if it was created successfully; otherwise, the function returns a NULL pointer.

The model should be accessed with the sdaiRW mode.

SdaiModel model = ...; SdaiEntity entCartesianPoint = sdaiGetEntity(model, "IfcCartesianPoint"); SdaiAppInstance cartesianPoint = sdaiCreateInstance(model, entCartesianPoint);