POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
SEISMIC_DATA_SET
SUBTYPE OF
(
geophysical_data_set
);
geometry_segment :
OPTIONAL
geophysical_geometry_segment
;
seismic_header :
OPTIONAL
seismic_header
;
INVERSE
pty_geometry_3d_region :
SET [0:?] OF
pty_geometry_3d_region
FOR
seismic_data_set;
seismic_pick :
SET [0:?] OF
seismic_pick
FOR
seismic_data_set;
UNIQUE
si:
data_trace
.identifier,
data_trace
.naming_system,
geophysical_data_set
.geometry_set;
WHERE
dri2: NOT (derived_from IN derived_data);
dri3: SELF :<>: derived_from;
END_ENTITY
; (* seismic_data_set *)
Generated on Tue Jul 10 19:39:05 2001
© Copyright 2001 POSC. All rights reserved.