area_element.bounding_ring
Specifies the edge or set of edges which delimit the area element. face.bounding_ring
Defines the set of rings which form the boundary of the face. For example, a polygon can be bounded by one ring while a face with a hole in it can be bounded by two rings. patterned_area.bounding_ring
Ring element specifies the bounding edge or edges of the patterned area. ring.face
Defines the set of faces for which this ring forms part of the boundary of the face. ring_s: Implements a foreign key to a row in one of the tables projected from entity ring depending on the value of the next column (See below). ring_t: Defines the name of the referenced table. Possible values are defined in @ring. face_s: Implements a foreign key to a row in one of the tables projected from entity face depending on the value of the next column (See below). face_t: Defines the name of the referenced table. Possible values are defined in @face.