A very active field of research of Database Management Systems (DBMS) is concerned with an augmentation of DBMS by rules. Passive rules (constraints) were the first to be investigated and are now widely accepted. Active rules (triggers) are in the transformation from research to mainstream applications. A more complex form of active rules, business rules, are now the topic of many research efforts. In our paper we present a framework for enhancement of SQL-based DBMS by business rules in mostly declarative form (as opposed to the more usual, but less manageable, procedural form). The techniques used utilize rule-based expert system methodology.
Ivan Bruha, Frantisek Franek, Vladimir L. Rosicky