I am searching that. I saw that some of them are main or combined, but I want to know the complete ist of them, if it is possible. I visit webs like http://nginx.org/en/docs/http/ngx_http_log_module.html#access_log and http://hb.321key.org/hb/nginx-1.3.8/03A6EA3ED31C437BB3DF5902E32F2E68/504FEDDC2B.htm, but as I said, there is not a list of formats in them.
So if someone knows, please share the information. I will try to search for the explanation of each of them after that, thanks.