Extensible KBMS for Large Knowledge-Base Application


STRETCH - 2443

Keywords database management, knowledge-base management, database programming, storage managers


Start Date: 01-JUN-89 / Duration: 30 months

[ contact / participants ]


Objectives and Approach

The objective of STRETCH is to design, implement and experiment with a system supporting the representation and manipulation of large knowledge-bases. Storage of persistent objects will be provided by a database supporting non-traditional data structures and operations for knowledge representation and management. The system will exploit the large central memories of recently developed workstations.

A major effort will be made to provide a physical and conceptual object manager for the storage and manipulation of knowledge and data in an integrated manner. This system will allow extensibility of typing, operations, access methods, and concurrency control. The object manager will support two linguistic paradigms:

These languages will constitute a multi-paradigm programming environment able to accommodate a number of applications. Early experimentation on the proposed rule-based and object-oriented linguistic styles has been obtained by rapid prototyping. The conceptual object manager provides an internal notation, suitable as a pivot for all language processors.

Progress and Results

Specification has been completed, and prototypes exist. The main-memory physical object manager, in particular, shows a very promising performance.

Exploitation

The availability of large knowledge-bases, managing and manipulating in an integrated way various types of information (data, knowledge, complex objects), will significantly increase the deployment of IT applications in many fields. To demonstrate the convenience of the linguistic notation and to evaluate the system's performance, the project includes a study in the area of Intelligent Training Systems (ITS).

The storage manager is available as a product called Observer from Infosys. Work to make it available with the object-oriented language, SPOKE, from Alcatel is under way.


CONTACT POINT

Mr Eric Darmois
ALCATEL ALSTHOM RECHERCHE
Route de Nozay
F - 91460 MARCOUSSIS
tel: + 33/ 1-64491131
fax: + 33/ 1-64490821

Participants

ALCATEL ALSTHOM RECHERCHE - F - C
AGUSTA SPA - I - P
POLITECNICO DI MILANO - I - P
SAGEM - F - P
TXT SPA - I - P
FERNUNIVERSITÄT - GH - HAGEN - D - P
MBP SOFTWARE & SYSTEMS GMBH - D - P
INRIA - F - P
INFOSYS - F - A
STZ GMBH - D - A


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STRETCH - 2443, December 1993


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html version of synopsis by Nick Cook