OptionalexpressionThe Arcade expression.
OptionalnameUnique identifier for the expression.
OptionalreturnReturn type of the Arcade expression. This can be determined by the authoring client by executing the expression using a sample feature(s), although it can be corrected by the user.
OptionaltitleTitle of the expression.
Arcade expression used in the form. See https://developers.arcgis.com/web-map-specification/objects/formExpressionInfo/.