orbeon forms - date validation

Question

I have got input with date binding

<xf:bind nodeset="ns:date_1" relevant="true()" type="xs:date"   />

and Orbeon creates inptut with datepicker, but it also requires me to fill it with date, otherwise it adds xforms-invalid css class. How can I make it optional not required?

I've already tried adding attribute required="true()", but nothing happens.

Answer 1

I found it:

instead of

type="xs:date"

declare

type="xf:date"