IEEE Transactions on Software Engineering
ODE (Object Database and Environment): the language and the data model
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
The design and analysis of spatial data structures
The design and analysis of spatial data structures
Rule condition testing and action execution in Ariel
SIGMOD '92 Proceedings of the 1992 ACM SIGMOD international conference on Management of data
Integrity maintenance in a heterogeneous engineering database environment
Data & Knowledge Engineering
The object database standard: ODMG 2.0
The object database standard: ODMG 2.0
ANSWER: network monitoring using object-oriented rules
AAAI '98/IAAI '98 Proceedings of the fifteenth national/tenth conference on Artificial intelligence/Innovative applications of artificial intelligence
Starburst Mid-Flight: As the Dust Clears
IEEE Transactions on Knowledge and Data Engineering
Compile-Time and Runtime Analysis of Active Behaviors
IEEE Transactions on Knowledge and Data Engineering
VLDB '98 Proceedings of the 24rd International Conference on Very Large Data Bases
Implementing High Level Active Rules on Top of a Relational DBMS
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
ECA Rule Support for Distributed Heterogeneous Environments
ICDE '98 Proceedings of the Fourteenth International Conference on Data Engineering
Active System for Heterogeneous ODBMS Using Mobile Rule Codes
ADBIS-DASFAA '00 Proceedings of the East-European Conference on Advances in Databases and Information Systems Held Jointly with International Conference on Database Systems for Advanced Applications: Current Issues in Databases and Information Systems
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Throughout many research and development projects for active rule systems, active rules are implemented with different syntaxes and semantics. It becomes one of the stumbling blocks to apply active database systems especially in networked heterogeneous multidatabase environments. Utilizing the recent development of CORBA and ODMG standards, a middleware approach to provide active rule systems for heterogeneous ODBMS is presented in this paper. The active rule system described is applied for integrity maintenance of spatial objects. According to the events included in application programs, the active rules represented in ECA type are inserted into the program by a preprocessor. One advantage of this compile approach is that the preprocessed program can be compiled and executed without the overhead of runtime monitoring. For the changed rules after compilation, a run time interpreter is included in the executable program.