STOC Conference 2000 Conference Paper
Computing the median with uncertainty
- Tomás Feder
- Rajeev Motwani 0001
- Rina Panigrahy
- Chris Olston
- Jennifer Widom
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Jennifer Widom
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2 papers
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2KER Journal 1993 Journal Article
An overview of production rules in database systems
- Eric N. Hanson
- Jennifer Widom
Abstract Database researchers have recognized that integrating a production rules facility into a database system provides a uniform mechanism for a number of advanced database features including integrity constraint enforcement, derived data maintenance, triggers, protection, version control, and others. In addition, a database system with rule processing capabilities provides a useful platform for large and efficient knowledge-base and expert systems. Database systems with production rules are referred to as active database systems, and the field of active database systems has indeed been active. This paper summarizes current work in active database systems, and suggests future research directions. Topics covered include database rule languages, rule processing semantics, and implementation issues.