Writing Controllers in openERP modules.

I have 3 questions that might require a detailed answer. (Links to tutorials or good illustrations would be really helpful) 1. How to map URL's to Controller functions. (like URLDispatcher in Django)? 2. How to write Controllers in OpenERP? (an additional comparison with Django Views would be great). 3. I see something like this in a controller. > class> MyController(oeweb.Controller):> _cp_path = '/some-path' Does _cp_path denote the corresponding URL, assigned to this Controller?