OO documentation

Hello, I have some questions about how I should document OO functions. May I follow George's style and include both OO and non-OO function in the same file? For example: tidy_parse_string and $tidy->ParseString() How do I document variables of an object? In the __contructor page? or in the reference.xml? ...? For example: $tidy->ErrorBuffer I've noted that tidy has the functions documented as $tidy_node->xxx, and SPL and SOAP have SOAPClient::xxx Which is the correct one? I think :: means static method? Maybe I'm wrong... Thanks, Nuno