POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
SHELL
SUBTYPE OF
(
spatial_object
);
INVERSE
face :
SET [0:?] OF
shell_composition
FOR
shell;
pty_geometry_3d_shell :
SET [0:?] OF
pty_geometry_3d_shell
FOR
shell;
shell_region_binding :
SET [0:?] OF
shell_region_binding
FOR
shell;
UNIQUE
si:
spatial_object
.identifier,
spatial_object
.located_object,
spatial_object
.identifying_whole,
spatial_object
.creating_activity,
spatial_object
.located_activity;
END_ENTITY
; (* shell *)
Generated on Tue Jul 10 19:39:07 2001
© Copyright 2001 POSC. All rights reserved.