Extensible query processing in starburst | ACM SIGMOD Record

Today's DBMSs are unable to support the increasing demands of the various applications that would like to use a DBMS. Each kind of application poses new requirements for the DBMS. The Starburst project at IBM's Almaden Research Center aims to extend ...

Extensible query processing in starburst | ACM SIGMOD Record

Today's DBMSs are unable to support the increasing demands of the various applications that would like to use a DBMS. Each kind of application poses new requirements for the DBMS. The Starburst project at IBM's Almaden Research Center aims to extend ...

Prototypes and Production Rules: A Knowledge Representation for Computer Consultations.

This thesis presents a system called CENTAUR, which demonstrates the effectiveness of representing prototypical knowledge in a combination of frames and production rules for performing computer consultations. Key knowledge representation and control structure problems in production rule systems similar to MYCIN are identified, and a set of important characteristics of the structures used for representing problem-solving knowledge is given. CENTAURs frames, or prototypes, complement the production rules to satisfy these characteristics and represent expected patterns of data that permit a more focused, hypothesis-directed approach to problem solving. Among the characteristics identified as desirable in the representation structures are the ability to explicitly represent a prototypical cases, b the context in which knowledge is applied, and c the strategies for applying that knowledge. CENTAURs prototypes consist of patterns of knowledge in the domain which serve as broad contexts, guiding the more detailed processing of the production rules. Strategies for the consultation, or control knowledge, are represented in the prototypes separately from other kinds of domain knowledge. This allows the domain expert to specify control knowledge that is specific to each prototype. Examples are presented which demonstrate how this explicit representation facilitates explanations of the systems reasoning. Further, the organization of knowledge in CENTAUR provides a useful framework for acquiring new knowledge.

Behavior of database production rules | Proceedings of the 1992 ACM SIGMOD international conference on Management of data

Static analysis techniques for predicting the behavior of active database rules | ACM Transactions on Database Systems

This article gives methods for statically analyzing sets of active database rules to determine if the rules are (1) guaranteed to terminate, (2) guaranteed to produce a unique final database state, and (3) guaranteed to produce a unique stream of ...