How do you reference a rule input in an expression?

In Appian, referencing a rule input in an expression can be achieved using the syntax associated with rule inputs. The correct method is to use the "ri!" syntax, which is a shorthand notation that allows developers to easily reference rule inputs defined in their interface or expression. When you specify a rule input as "ri!exampleInput," it directly accesses the value of that input within the context of the expression.

This is essential for dynamic interfaces or expressions where user input or context-specific data is required. The "ri!" format simplifies the process and improves the readability of the code by clearly indicating that you are referring to a rule input.

Other options do not accurately represent how to reference rule inputs. For example, "rule!" and "ruleInput()" may suggest a different approach or incorrect syntax for accessing rule inputs in Appian. "a!ri" is not a valid syntax either, as it mixes context references that are not applicable in this situation. Therefore, the use of "ri!" is the standard and correct way to reference rule inputs in your expressions.