Introduction to CLIPS

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Introduction to CLIPS

• CLIPS - C Language Integrated Production System

2
CLIPS

• Multi-paradigm Programming Language
• Supports the following
• rule-based
• object-oriented
• procedural programming
• only supports forward-chaining

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Basic Components of CLIPS (1)

• Fact List
• this is the data/information from which various
  inferences are drawn
• Knowledge Base
• this contains all the rules that operate on the
  facts

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Basic Components of CLIPS (2)

• Inference Engine
• this is the heart of the system which does all
  the work in terms of sequencing and firing rules,
  controlling actions etc.

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An Expert System - Example

• Facts -
• John is a man,
• Mary is a woman,
• Johns father is Tom,
• Marys father is Tom.
• Rule -
• If a man and woman have same father
• then they must be brother and sister

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An Expert System - Example (contd.)

• Based on this rule and the facts,
• can you infer that that John and Mary are
  brother and sister?
• Yes!!
• Okay then, lets try it in CLIPS!

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Exercise 1

• Implement this set of facts and rule in CLIPS!!