Conditions that test set membership

You can use conditions to test whether a business term belongs to a set.

A rule condition (if) states when to carry out the actions (then and else parts) in a rule. A condition can test whether a variable is part of a category.

Example 1

This condition tests whether a customer is in the Silver, Gold, or Platinum category:

if 
	the customer category is one of {Silver, Gold, Platinum}

Example 2

This condition tests whether the rule variable luxury car groups contains the car group that is specified in the current rental agreement. The rule first defines the variable luxury car groups as the set of all car groups with a daily rate above a certain value:

definitions
	set 'luxury car groups' to all car groups where the daily rate of each car group is at least 50;
if
	'luxury car groups' contain the car group of 'the current rental agreement'