POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
EDGE
SUBTYPE OF
(
spatial_object
);
first_boundary :
OPTIONAL
vertex
;
first_node :
OPTIONAL
ndt_edge_boundary_type
;
on_surface :
OPTIONAL
ndt_logical
;
second_boundary :
OPTIONAL
vertex
;
INVERSE
pty_azimuth :
SET [0:?] OF
pty_azimuth
FOR
edge;
pty_geometry_1d_edge :
SET [0:?] OF
pty_geometry_1d_edge
FOR
edge;
pty_geometry_2d_edge :
SET [0:?] OF
pty_geometry_2d_edge
FOR
edge;
pty_geometry_3d_edge :
SET [0:?] OF
pty_geometry_3d_edge
FOR
edge;
pty_inclination_from_vertical :
SET [0:?] OF
pty_inclination_from_vertical
FOR
edge;
pty_length :
SET [0:?] OF
pty_length
FOR
edge;
ring :
SET [0:?] OF
ring_composition
FOR
edge;
UNIQUE
si:
spatial_object
.identifier,
spatial_object
.located_object,
spatial_object
.identifying_whole,
spatial_object
.creating_activity,
spatial_object
.located_activity;
END_ENTITY
; (* edge *)
Generated on Tue Jul 10 19:37:46 2001
© Copyright 2001 POSC. All rights reserved.