8.3.3.a data binding restrictions on value element 8.3.3.a data binding restrictions on value element When you select the values "One" or "Two" from the Number select1 control you must see an xforms-invalid message. When you select the value "Three" from the Number select1 control you must see an xforms-valid message. Number: One one Two two Three 3 xforms-valid xforms-invalid