Question about documenting php code

I've been developing on not-that-small project using OOP. I notice that documentation is vital part on every software development. So I start to learn how to make a standard documentation, currently I'm using phpdoc. But one thing that made me pretty confuse is .... too many tags to remember! like, @access,@internal,@global, and so on. If anybody could point me the most important tags, or things that i really should care when doing documentation and things that i shouldn't really care about, I will be appreciate it. Thanks a lot folks. --------------- Yuniar Setiawan