Is there any way in JSF 2.0/PrimeFaces of re-rendering all components (using the PrimeFaces update="id1 id2..." attribute or the <f:ajax render="..."/> tag) that have got a given ID, regardless of whether they are in the same form that contains the button triggering the AJAX re-render or not?

For example, I want my button to re-render all sections on a page that visualize the user's current shopping basket.

Right now, I always have to specify the absolute path to the components that I want to get updated, e.g.

update=":header:basket :left-sidebar:menu:basket"

which is rather impractical if the structure of the page changes (besides, I have not been able to figure out the correct path for one of these components). I already tried to implement a custom EL function like this, which traverses the component tree:

update="{utilBean.findAllComponentsMatchingId('basket')}"

but at the time that function is evaluated, apparently not the entire component tree has been set up as it doesn't contain the components I am looking for.

How can I deal with this? There certainly must be an easy way of doing AJAX-based updates of sections of the page that are not part of the current <h:form>?

Thanks!