What are use case-based behaviors?

There are various behaviors included in the Default Rule with your AMD property, that are used to implement "use case-based provisioning" for delivery of your content. You should familiarize yourself with these "use case-based" behaviors and how they're applied before you start using Mixed Mode Configuration (MMC).

The basics

These behaviors are required in the Default Rule of a property for AMD. MMC allows you to also include them in additional rules with their own unique match criteria. The use case-based behaviors for AMD include:

Property rule and behavior logic, and MMC

When applying rules in a property, the bottom rule in the list is reviewed first: if its match criteria is met by a request for content, the settings in its behaviors are applied for that request. The Default Rule is processed last and its behaviors' settings are applied to all requests. In the case of duplicate behaviors, if the match criteria in all other rules in the property don't match the request, the instance of the behavior in the Default Rule is used.

So, with MMC consider the following:

  • Use case-based behaviors are required in the Default Rule. If you added a use case-based behavior to a custom rule to support MMC, and that rule's match criteria is not met by a request, the settings applied in the Default Rule for the same use case-based behavior are applied for the request.
  • Rule logic "trickles down". Rules stack and the last rule listed is read first. If a request does not meet the match criteria in the last rule, the second-to-the-last rule is checked next, and so on. Consider this when applying the same use case-based behavior in multiple rules. For example, you've set up two rules with unique match criteria, along with the Default Rule that applies to all requests. They all contain the "Content Characteristics" behavior. If the match criteria in the second (last) rule isn't matched by a request, the first rule is checked. If that criteria isn't matched, what's set in the Default Rule would be used.
  • Remember that the Default Rule is still applied to all requests. Behaviors included in the Default Rule, but not in a custom rule are applied to requests, too. So, if you set up a non-use case-based behavior in the Default Rule, its settings are also applied to a request. However, if you set up the same behavior in the custom rule, and that rule's match criteria is met, that behavior's settings are used, rather than what's in the Default Rule.