POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
TRANSFORMATION_METHOD
(* Open *)
SUBTYPE OF
(
aliasable_technical_reference
);
reverse_transform_valid :
ndt_boolean
;
sign_reversal :
OPTIONAL
ndt_boolean
;
INVERSE
map_projection :
SET [0:?] OF
map_projection
FOR
transformation_method;
parameter_usage :
SET [0:?] OF
transformation_parameter_usage
FOR
transformation_method;
single_transformation :
SET [0:?] OF
single_transformation
FOR
transformation_method;
UNIQUE
si:
technical_reference
.identifier;
WHERE
val: ((reverse_transform_valid = FALSE) AND (NOT EXISTS(sign_reversal))) OR ((reverse_transform_valid = TRUE) AND EXISTS(sign_reversal));
END_ENTITY
; (* transformation_method *)
Generated on Tue Jul 10 19:39:13 2001
© Copyright 2001 POSC. All rights reserved.