Boolean values may be represented by the following case-insensitive values:
true - y, yes, t, true, 1, onfalse - anything elseOmitted values are interpreted as null when the service expects a Boolean and
false when the service expects a boolean unless specified otherwise.
For example, if you had a widget with an id integer field and an is_active boolean field, it might look like:
<widget id="1" is_active="Y"/>{"__type":"widget", "id":"1", "is_active":"Y"}