POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
MINERAL_ZONE
SUBTYPE OF
(
earth_feature
);
base_depth :
OPTIONAL
ndt_location_1d
;
base_marker :
OPTIONAL
stratigraphic_marker
;
earth_parcel :
OPTIONAL
earth_parcel
;
top_depth :
OPTIONAL
ndt_location_1d
;
top_marker :
OPTIONAL
stratigraphic_marker
;
INVERSE
well_completion :
SET [0:?] OF
well_completion
FOR
mineral_zone;
UNIQUE
si:
earth_feature
.identifier, earth_parcel;
WHERE
val1: (EXISTS(top_depth) XOR EXISTS(top_marker)) AND (EXISTS(base_depth) XOR EXISTS(base_marker));
END_ENTITY
; (* mineral_zone *)
Generated on Tue Jul 10 19:38:07 2001
© Copyright 2001 POSC. All rights reserved.