Optional ReadonlychoicesDistinct answers; required for choice and only there.
ReadonlylabelDisplay text.
Optional ReadonlymaxLongest text, at least 1; only for text and textarea.
ReadonlynameKey of the field in the submitted values, [a-z][a-z0-9_]*, unique in the form.
Optional ReadonlyrequiredWhether the field must be filled (default false).
ReadonlytypeOne of FORM_FIELD_TYPES.
One field of a form.