**Change a python dictionary (context for example)**
.. code-block:: xml
$new_value
Note that views are subject to evaluation of xmlids anyways, so if you need
to refer to some xmlid, say ``%(xmlid)s``.
**Move an element in the view**
.. code-block:: xml
This can also be used to wrap some element into another, create the target
element first, then move the node youwant to wrap there.
**Add to values in a list (states for example)**
.. code-block:: xml
$new_value(s)
**Remove values from a list (states for example)**
.. code-block:: xml
$remove_value(s)