POSC Specifications Version 2.2

Epicentre Logical Data Model

---

ENTITY VERTICAL_DATUM_OFFSET (* Open *)

SUBTYPE OF (transient_association, reference_behavior);

earth_point : OPTIONAL earth_point;
initial_datum : vertical_datum;
length_offset : OPTIONAL ndt_length_midrange;
terminal_datum : vertical_datum;
time_offset : OPTIONAL ndt_seismic_time;

UNIQUE

si: transient_association.end_time, transient_association.start_time, earth_point, initial_datum, terminal_datum;

WHERE

dri: initial_datum :<>: terminal_datum;

END_ENTITY; (* vertical_datum_offset *)

---

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