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A deductive database system is a database system which can make deductions (ie: infer additional rules or facts) based on and facts stored in the (deductive) database.Deductive database systems: Datalog is both a syntactic subset of prolog and a database query language – it is designed specifically for working with logic and databases. Deductive databases are also known as: logic databases, knowledge systems and inferential databases. The problem domain of an expert system / deductive database is usually quite narrow. Deductive databases are similar to expert systems - “traditional” expert systems have assumed that all the facts and rules they need (their knowledge base) will be loaded into main memory, whereas a deductive database uses a database (usually on disk storage) as its knowledge base. Traditional expert systems have usually also taken their facts and rules from a real expert in their problem domain, whereas deductive databases find their knowledge inherent in the data. Deductive databases and expert systems are mainly used for:
Reference Author: Elmasri and Navathe Title: Fundamentals of database systems (3rd edition) Publisher: Addison-Wesley Longman ISBN 0-201-54263-3 See also | ||||||||
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