POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
DATUM
ABSTRACT SUPERTYPE OF
(
ONEOF
(
geodetic_datum
,
vertical_datum
))
SUBTYPE OF
(
aliasable_technical_reference
);
END_ENTITY
; (* datum *)
Generated on Tue Jul 10 19:37:42 2001
© Copyright 2001 POSC. All rights reserved.