There are more than 20,000 volunteers who make-up the Open Directory Project’s indexing core. The criteria for getting listed in the Open Directory Project is a little tight and many of the pages submitted are not indexed on the first try. However, if you use a little common sense and follow some pretty basic rules, getting listed shouldn't be a problem. The following are some guidelines to consider before submitting your site to the Open Directory Project. Your Web Site: Is the site already.