POSC Specifications Version 2.2
Epicentre Logical Data Model
ENTITY
MATERIAL_CLASS
(* Open *)
SUBTYPE OF
(
classification_class
);
higher_ranking_class :
OPTIONAL
SET [0:?] OF
material_class
;
rock_feature :
OPTIONAL
rock_feature
;
INVERSE
lower_ranking_class :
SET [0:?] OF
material_class
FOR
higher_ranking_class;
be_a_member_of :
SET [0:?] OF
material_class_classification
FOR
have_as_a_member;
classify :
SET [0:?] OF
material_class_classification
FOR
be_classified_as;
material_classification :
SET [0:?] OF
material_classification
FOR
material_class;
material_class_alias :
SET [0:?] OF
material_class_alias
FOR
material_class;
UNIQUE
si:
classification_class
.name,
classification_class
.classification_system;
END_ENTITY
; (* material_class *)
Generated on Tue Dec 9 09:49:20 1997
© Copyright 1997 POSC. All rights reserved.