References to image.src corrected - it's image.url

docs/building_your_site/frontenddevelopers.rst

@@ -202,26 +202,31 @@ Extra attributes can be specified with the syntax ``attribute="value"``:
 
     {% image self.photo width-400 class="foo" id="bar" %}
 
-No validation is performed on attributes add in this way by the developer. It's possible to add `src`, `width`, `height` and `alt` of your own that might conflict with those generated by the tag itself.
+No validation is performed on attributes added in this way so it's possible to add `src`, `width`, `height` and `alt` of your own that might conflict with those generated by the tag itself.
 
 
-**Generating the image "as"**
+**Generating the image "as foo" to access individual properties **
 
-Wagtail can assign the image data to another object using Django's ``as`` syntax:
+Wagtail can assign the image data to another variable using Django's ``as`` syntax:
 
 .. code-block:: django
 
     {% image self.photo width-400 as tmp_photo %}
 
-    <img src="{{ tmp_photo.src }}" width="{{ tmp_photo.width }}" 
+    <img src="{{ tmp_photo.url }}" width="{{ tmp_photo.width }}" 
         height="{{ tmp_photo.height }}" alt="{{ tmp_photo.alt }}" class="my-custom-class" />
+        
+
+.. Note::      
+    The image property used for the `src` attribute is actually `image.url`, not `image.src`.
+
 
 The ``attrs`` shortcut
 -----------------------
 
 .. versionadded:: 0.4
 
-You can also use the ``attrs`` property as a shorthand to output the ``src``, ``width``, ``height`` and ``alt`` attributes in one go:
+You can also use the ``attrs`` property as a shorthand to output the attributes ``src``, ``width``, ``height`` and ``alt`` in one go:
 
 .. code-block:: django