Circumstance
A circumstance is an optional qualification available for supported rule types. Commonly referred to as a "circumstanced" or "specialized" version, a circumstance is based upon an unqualified rule known as the base rule.
Using circumstances in your application allows you to easily support a variety of use cases. For example, you may want a different data transform to execute depending on a customer's geographic location (i.e. when .StateCode = "MA"). Instead of maintaining the logic for all cases in one large rule, start with a base rule and extend (or specialize) it as needed. At runtime, PRPC automatically selects the correct version to execute as part of its rule resolution process.
There are many options available for circumstancing or specializing a base rule including:
- One single value property
- Multiple single value properties, also known as multivariate
- Date property
- Date range
To verify if an existing rule is either a circumstanced version or is a base rule, open it in the Designer Studio and inspect the form header. The Circumstanced link will appear; click it to see the circumstance values or an indication that the rule is a base version. If the existing rule is neither a base nor a circumstanced version, the link will not be visible.
To see all available circumstances for a given base rule, navigate to the rule in the Application Explorer. Use the expand icon 
next to the name of the base rule to display each of the circumstanced instances and their values.
For more details on the supported circumstance definitions, see Circumstances — Concepts and terms.
For instructions on how to create a circumstanced version of a base rule, see Completing the Specialization form.
Definitions