Rules are objects too: A knowledge model for an active, object-oriented databasesystem
Lecture notes in computer science on Advances in object-oriented database systems
Expert database systems: knowledge/data management environments for intelligent information systems
Information Systems - Knowledge engineering
COCS '90 Proceedings of the ACM SIGOIS and IEEE CS TC-OA conference on Office information systems
Event specification in an active object-oriented database
SIGMOD '92 Proceedings of the 1992 ACM SIGMOD international conference on Management of data
Snoop: an expressive event specification language for active databases
Data & Knowledge Engineering
Advanced database support facilities for CSCW systems
Journal of Organizational Computing and Electronic Commerce
A meta modelng approach to workflow management systems supporting exception handling
Information Systems - Special issue on meta-modelling and methodology engineering
Active Database Systems: Triggers and Rules for Advanced Database Processing
Active Database Systems: Triggers and Rules for Advanced Database Processing
Formal Specification of Geographic Data Processing Requirements
IEEE Transactions on Knowledge and Data Engineering
The Design and Implementation of the Ariel Active Database Rule System
IEEE Transactions on Knowledge and Data Engineering
ADOME: An Advanced Object Modeling Environment
IEEE Transactions on Knowledge and Data Engineering
EDBT '96 Proceedings of the 5th International Conference on Extending Database Technology: Advances in Database Technology
ECA Rule Integration into an OODBMS: Architecture and Implementation
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
A Model for Active Object Oriented Databases
VLDB '91 Proceedings of the 17th International Conference on Very Large Data Bases
Ode as an Active Database: Constraints and Triggers
VLDB '91 Proceedings of the 17th International Conference on Very Large Data Bases
Composite Event Specification in Active Databases: Model & Implementation
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
Composite Events for Active Databases: Semantics, Contexts and Detection
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
NAOS - Efficient and Modular Reactive Capabilities in an Object-Oriented Database System
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
Activity Specification Using Randezvous
RIDS '95 Proceedings of the Second International Workshop on Rules in Database Systems
An Extensible Approach to Reactive Processing in an Advanced Object Modelling Environment
DEXA '97 Proceedings of the 8th International Conference on Database and Expert Systems Applications
EXACT: an extensible approach to active object-oriented databases
The VLDB Journal — The International Journal on Very Large Data Bases
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A new approach for supporting reactive capability is described in the context of an advanced object-oriented database system called ADOME-II. Besides having a rich set of pre-defined composite event expressions and a well-defined execution model, ADOME-II supports an extensible approach to reactive processing so as to be able to gracefully accommodate dynamic applications' requirements. In this approach, production rules combined with methods are used as a unifying mechanism to process rules, to enable incremental detection of composite events, and to allow new composite event expressions to be introduced into the system declaratively. This allows the definition of new production rules each time an extension of the model takes place. Methods of supporting new composite event expressions are described, and comparisons with other relevant approaches are also conducted. A prototype of ADOME-II has been constructed, which has as its implementation base an ordinary (passive) OODBMS and a production rule base system.