POSC Specifications Version 2.2

Epicentre Logical Data Model

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ENTITY ELLIPSOID (* Open *)

SUBTYPE OF (technical_object, reference_behavior);

description : OPTIONAL ndt_comment;
identifier : ndt_name;
inverse_flattening : OPTIONAL ndt_real4;
ref_naming_system : OPTIONAL ref_naming_system;
semimajor_axis : OPTIONAL ndt_accurate_length;
semiminor_axis : OPTIONAL ndt_accurate_length;

INVERSE

ellipsoid_alias : SET [0:?] OF ellipsoid_alias FOR ellipsoid;
geodetic_datum : SET [0:?] OF geodetic_datum FOR ellipsoid;

UNIQUE

si: identifier;

WHERE

val: EXISTS(semimajor_axis) AND (EXISTS(semiminor_axis) XOR EXISTS(inverse_flattening));

END_ENTITY; (* ellipsoid *)

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Generated on Tue Dec 9 09:49:01 1997
© Copyright 1997 POSC. All rights reserved.