POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
TOPOLOGICAL_RELATIONSHIP
SUBTYPE OF
(
transient_association
);
de9im :
OPTIONAL
ndt_de9im
;
primary_topological_object :
topological_object
;
secondary_topological_object :
topological_object
;
spatial_predicate :
ndt_spatial_predicate
;
UNIQUE
si:
transient_association
.end_time, spatial_predicate,
transient_association
.start_time, primary_topological_object, secondary_topological_object;
END_ENTITY
; (* topological_relationship *)
Generated on Tue Jul 10 19:39:13 2001
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