I am in my early stages of creating a directory script. The main and only inspiration is phpld. So for search engine friendly urls would you go with localhost. com/cat_name.html or localhost .com/cat_name/
It would be better to let the users have the ability to use all the options above or creating their own format. Ex : cat_name.htm
thanks for you suggestion i will try to work on it after my exams get over. I am still preparing the algorithm and asking for suggestions.