POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
FACILITY_CLASSIFICATION
SUBTYPE OF
(
transient_association
);
facility :
facility
;
facility_class :
OPTIONAL
facility_class
;
material_class :
OPTIONAL
material_class
;
object_abundance_class :
OPTIONAL
object_abundance_class
;
UNIQUE
si:
transient_association
.end_time,
transient_association
.start_time, facility_class, material_class, facility;
WHERE
mse: EXISTS(facility_class) XOR EXISTS(material_class);
END_ENTITY
; (* facility_classification *)
Generated on Tue Jul 10 19:37:49 2001
© Copyright 2001 POSC. All rights reserved.