AngularJS - Simple Directive Use

Assign to scope

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<script src="http://code.angularjs.org/1.0.0/angular-1.0.0.js"></script>
<div ng-app="myApp">
    <div ui-foo>I should change iamfoo</div>
    <br>
    <div ui-bar att-label="HELLO">I should change to iambar</div>
    
</div>

CSS

.ui-state-highlight { background-color: #EEEEEE; }

JavaScript

angular.module('ui.directives', []).directive('uiBar',
    function($parse,Data) {
      return {
        restrict: 'A',

        link: function($scope, element, attrs, controller) {
          var controllerOptions, options;
          element.text("iambar " + attrs.attLabel);
          $scope.label = attrs.attLabel;
        }
      };
    }
  )
  .directive('uiFoo', 
    function(Data) {
      return {
        restrict: 'A',
        link: function($scope, element, attrs, controller) {
          var controllerOptions, options;
           	 $scope.$watch(function(){return $scope.label;},function(newValue,oldValue) {
           element.text("iamfoo " + $scope.label)
          })
        }
      };
    }
  );
angular.module('myApp', ['ui.directives','ui.factory']);