POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
WELLBORE_GEOLOGIC_TARGET
SUBTYPE OF
(
transient_association
);
geologic_feature :
OPTIONAL
geologic_feature
;
local_rock_feature :
OPTIONAL
local_rock_feature
;
next_target :
OPTIONAL
wellbore_geologic_target
;
wellbore :
wellbore
;
INVERSE
previous_target :
SET [0:1] OF
wellbore_geologic_target
FOR
next_target;
UNIQUE
si: geologic_feature, local_rock_feature, wellbore;
WHERE
mse: EXISTS(geologic_feature) XOR EXISTS(local_rock_feature);
sri: next_target.wellbore :=: wellbore;
END_ENTITY
; (* wellbore_geologic_target *)
Generated on Tue Jul 10 19:39:18 2001
© Copyright 2001 POSC. All rights reserved.