Which CPL component tests one aspect of a request against a Boolean expression of values?

The component that tests one aspect of a request against a Boolean expression of values is the one typically referred to as Conditions. Conditions are utilized within Control Policy Language (CPL) to evaluate specific attributes or aspects of a request to determine whether they meet predefined criteria. When a request comes in, the Conditions evaluate against the Boolean criteria defined within the policy.

For instance, if a condition specifies that an incoming request's URL must match a certain pattern, the CPL engine checks this condition to ascertain if the request meets it. If the condition evaluates to true, the policy can then proceed to execute the corresponding actions. This mechanism allows for creating dynamic policies that can respond to various situations based on the characteristics of the requests being processed.

On the other hand, rules represent a set of Conditions and Actions combined; triggers indicate an event that activates a certain policy, and actions define what should happen if the Conditions test positive. Each of these plays a crucial role in the functioning of CPL, but it's the Conditions that specifically test aspects of requests against Boolean expressions.