First let me say that I really like Nevow template system. Once you became expert with it, it proves to be really flexible. The problem is the performance. I have done a simple test with the rendering of a table 5 * 20, Nevow against Django, and Nevow is much slower. The problem is that, I think, there are a lot of objects adaptation. Is it possible to use that same model used by django.template? You pass a context (that is a dictionary usable like a stack: push/pop) to the render function. All the data directive will search the data in the context (like djando, first dictionary lookup, then attribute lookup, and so). As an example n:data='x.y' ==> ctx['x']['y']. A rend.Page.renderHTTP can build a context from the instance dictionary. Thanks and regards Manlio Perillo