A production system consists of three elements:
- a database or working memory of facts, which can include temporary states such as "Goal(open door)";
- a set of rules of the form IF <condition> THEN <action>, where conditions are logical expressions about the working memory, and actions may include changes to the working memory such as "ADD Goal(find key)"; and
- an interpretter, which matches the conditoons against the working memory and then executes the action for a matching rule.
Used in Chap. 2: pages 16, 18, 23; Chap. 13: page 193; Chap. 18: page 279; Chap. 22: pages 344, 345
Also known as database, interpreter, language, working memory