What are the three parts of a rule?

• A. Action, Condition, Result
• B. Name, Type, Scope
• C. Input, Process, Output
• D. Property, Operator and Value

Answer: (D)

A rule is composed of three parts: the property you're testing, the operator that defines the relationship, and the value you compare against. This structure lets a rule engine evaluate whether something meets the condition. For example, in a rule like age > 18, age is the property, > is the operator, and 18 is the value. Other descriptions refer to different ideas—what happens when a rule fires, or general data flow—so they don’t capture how a rule’s condition is evaluated. So Property, Operator and Value best describe how a rule expresses its condition.