OptionaldescriptionA string that describes the element in detail.
OptionaldisplayAn integer that indicates the maximum number of records to display.
OptionaldisplayA string that defines how the related records should be displayed.
OptionaleditableA Boolean determining whether users can edit this form element. If not supplied the default value is true.
OptionallabelA string value indicating what the element represents.
String value indicating which type of element to use.
OptionalvisibilityA reference to an Arcade expression that returns a boolean value. When this expression evaluates to true, the element is displayed. When the expression evaluates to false the element is not displayed. If no expression is provided, the default behavior is that the element is displayed.
Defines how a relationship between feature layers and tables can participate in the form. When present in the form, the user may have the option to add or edit related records. See https://developers.arcgis.com/web-map-specification/objects/formRelationshipElement/.