In uniPaaS I have a model (Attribute=Alpha; Picture=1) with Range=J,N. That allows the users to insert only J or N into an edit field using that model. But now I have to change the range property of that model, so that a user also can type a space to that input field. Also it should be possible to leave the input field empty.
I tried the following as Range, but nothing works:
J,,N
J, ,N
J,' ',N
J," ",N