[Zope] Cachable objects

Hi, I'd like to be able to cache several objects of my Zope site in a RAM cache manager. My questions are : - how can I make a class "cachable" ? - is it the whole objects that are cached, or just the result of their called methods ? - when a cached object is modified, is there any way to refresh it in the cache ? - and any other important points about caching that I should take care of... Thanks, Thierry -- Linux every day, keeps Dr Watson away... http://gpc.sourceforge.net -- http://www.ulthar.net