POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
RING
SUBTYPE OF
(
spatial_object
);
on_surface :
OPTIONAL
ndt_logical
;
INVERSE
edge :
SET [0:?] OF
ring_composition
FOR
ring;
face :
SET [0:?] OF
ring_face_binding
FOR
ring;
pty_geometry_2d_ring :
SET [0:?] OF
pty_geometry_2d_ring
FOR
ring;
pty_geometry_3d_ring :
SET [0:?] OF
pty_geometry_3d_ring
FOR
ring;
UNIQUE
si:
spatial_object
.identifier,
spatial_object
.located_object,
spatial_object
.identifying_whole,
spatial_object
.creating_activity,
spatial_object
.located_activity;
END_ENTITY
; (* ring *)
Generated on Tue Jul 10 19:39:01 2001
© Copyright 2001 POSC. All rights reserved.