Which domain prefix should be used for variables in an Appian interface?

Which domain prefix should be used for variables in an Appian interface?

• A. pv!
• B. cos!
• C. a!
• D. pv

Answer: (A)

In an Appian interface, you reference values that come from outside the interface using pv!. This prefix marks the variable as a parameter or process variable provided to the interface, so the UI can bind to external data and respond to user input. Using pv! ensures the values are treated as inputs rather than literals or internal state. For example, a text field might use value: pv!customerName and saveInto: pv!customerName, tying the UI to the data passed into the interface. The other prefixes aren’t used for this purpose. a! is the general prefix for Appian functions and component builders, not for naming interface inputs. pv without the exclamation mark isn’t valid syntax in this context, and cos! isn’t a recognized domain prefix for interface variables.

In an Appian interface, you reference values that come from outside the interface using pv!. This prefix marks the variable as a parameter or process variable provided to the interface, so the UI can bind to external data and respond to user input. Using pv! ensures the values are treated as inputs rather than literals or internal state. For example, a text field might use value: pv!customerName and saveInto: pv!customerName, tying the UI to the data passed into the interface.

The other prefixes aren’t used for this purpose. a! is the general prefix for Appian functions and component builders, not for naming interface inputs. pv without the exclamation mark isn’t valid syntax in this context, and cos! isn’t a recognized domain prefix for interface variables.