ODB-Tools Architecture
The ODB Tool is a fully modular software for schema validation and query optimization in OODB. It's open component for the input/output interface, now compatible with the ODMG 93 standard. It has been developed at the Dipartimento dell'Ingegneria dell'Informazione of the Università di Modena e Reggio Emilia and is composed of four modules:
- ODL Schema Interface: the schema acquisition module that accepts
a schema description in ODL language and translate it into OCDL
schema. ODL syntax has been extended to
provide the IC Rules descriptive capability.
- OQL Query Interface: the query input (output) interface module that
receives (outputs) a query in OQL language and translate it into
(from) OCDL syntax.
- Schema Validator: the schema validation module which
automatically build the class taxonomy and preserve the coherence with
respect to the inheritance and aggregation hierarchies.
- Query Expander: the module which executes the semantic expansion of
the query (by using the Schema Validator).
