Form Binding with Checkbox

I have a basic form that contains a checkbox and uses bindings as follows:

<?xml version="1.0"?>

when I read a record in from the form.load everything gets populated except the checkbox. I’m unclear as to how the response from .load needs the XML structured to indicate that the box should be checked. Currently I’m returning:

<?xml version="1.0"?> 3 true

change init code as

and in XML , you can use

set