POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
WELL_LOG
SUBTYPE OF
(
document_specification
);
earth_feature :
OPTIONAL
earth_feature
;
ref_well_log_process_state :
OPTIONAL
ref_well_log_process_state
;
wellbore :
OPTIONAL
wellbore
;
UNIQUE
si:
document_specification
.identifier, earth_feature, wellbore;
WHERE
ose1: NOT (EXISTS(wellbore) AND EXISTS(earth_feature));
END_ENTITY
; (* well_log *)
Generated on Tue Jul 10 19:39:19 2001
© Copyright 2001 POSC. All rights reserved.