Deductive Database System - 2

A deductive database is similar to an expert system, except an expert system usually requires its knowledge base to be in main memory whereas a deductive database system usually stores its knowledge base on a hard disk. Also, expert systems usually take their knowledge directly from experts, whereas deductive database systems find their knowledge inherent in the data.

Deductive databases and expert systems are mainly used for:

• Replicating the functionality of a real expert.
• Hypothesis testing.
• Knowledge discovery (finding new relationships between data).