POSC Specifications Version 2.2

Epicentre Logical Data Model

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ENTITY VERTEX
ABSTRACT SUPERTYPE OF (ONEOF( point_element, earth_point, other_vertex))
SUBTYPE OF (simple_spatial_object);
INVERSE

edge : SET [0:?] OF edge FOR vertex;

END_ENTITY; (* vertex *)

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Generated on Tue Dec 9 09:50:52 1997
© Copyright 1997 POSC. All rights reserved.