When do isolated scope properties actually get added to the scope?

Question

I\'m creating some directives with an isolated scope and some aliased properties. For example:

scope: {
   prop1: \'@\'
}

My question is, w

Answer 1

I found that this works inside the directive definition:

scope: {
    prop1: '@'
},
link: function(scope, element, attrs) {
    ...
    attrs.$observe('prop1', function(val) { 
        scope.prop1 = val || 'default'
    });
    ...
}

to make

behave like