POSC Meta Model Specifications Version 2.3
Logical Data Model
SCHEMA_DEF
(Rules)
(Express)
This holds the schema name and definition.
name
(M, K: string(40))
The name of the schema in EXPRESS.
source
(M:
source
)
The source of the schema, e.g. Epicentre V2.0
entities
(V: SET[0:?]
entity_def
(schema_def))
The entities defined in this schema.
referenced_by
(V: SET[0:?]
ref_schema
(parent_schema))
Other schemas that are referenced by this schema.
types
(V: SET[0:?]
type_def
(schema_def))
The types defined in this schema.
used_in
(V: SET[0:?]
ref_schema
(refd_schema))
Other schemas that are used in this schema.
Local rules:
Uniqueness Constraint
name
Entity projects as table
SCHEMA_DEF
.
Referenced in Diagrams:
PJ1:Logical meta data
© Copyright 1997-2001 POSC. All rights reserved.