gistfile1.html

<script type="text/ng-template" id="form-template">
  <div ng-messages>
    <div ng-message="invalid">You entered an invalid value for this field</div>
    <div ng-message="required">This value is required</div>
    <div ng-message="minlength">Your value is too short</div>
  </div>
</script>

<form>
  <input name="myEmailInput" />
  <div ng-messages-for="myForm.myInput" template="form-template">
    <!-- this replaces the "invalid" message <div> inside of the template above -->
    <div ng-message="invalid">You entered your email incorrectly</div>
  </div>
</form>