Hello, I want to create an application (Software Build System) where one or more of the Models are not data bases. What is the generic API between ActionPack and Model''s. Another way to look at this is that I want to create a Mock Model. The cloesest I''ve seen in AWDR is on page 405 in the section "Dynamiclly Update a List". I also saw the discussion on the wiki (http://wiki.rubyonrails.com/rails/pages/GenericModelDiscussion) and this talks exactly about the problem but they are discussing generalities and I need some implementation guidance. Thanks, Wink Saville