Business rules (action rules, decision tables, or decision trees) let you express your policy statements using predefined business vocabulary that can be interpreted by a computer.

For example, the policy "refuse the loan of customers whose credit score is below the minimum of 200" can be expressed as a business rule in the following way:

definitions
   set `minimum_score' to 200
if
   the credit score of `the borrower' is less than `minimum_score'
then
   refuse the loan with the message "Credit score below" + "minimum_score"

Although writing and editing rules is intuitive, new users may feel more confident if they familiarize themselves with the different parts of a business rule:

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