Thanks for the reply!
I guess you mean about the list type when multi-select is checked? Yes that seems it would be a problem. If you allow me to make a suggestion:
#def variable_name
type = list
multi_select = true;
value = {
"item1" : true,
"item2" : true,
"item3" : false,
"item4" : true
}
#def variable_name
type = string;
value = "hey";