[Twisted-web] Parametrized data_foo method?

<n:invisible data="foo" ....

I would like to pass custom argument to data_foo depending the usage in xml templates. Is this possible?

Another question ...

<div n:data="foo"> <h2> <n:invisible n:data="title" n:render="post_title"/> </h2>

data_foo returns a dictionary say {"title":... "name": ... }

Here how to access the "name" dict item from render_post_title?