A Draft Standard (DS) is a draft standardization. In the case of the Internet standards described in the Request for Comments
(RFC), this has a minimum duration of four months. Prerequisites for a Draft Standard are demonstrations and experience of at least two independent implementations. Prerequisites for a Draft Standard are recommendation by the Internet Engineering Steering Group
(IESG), technical maturity and practical testing.Proposed Standard (PS), the realization of a Draft Standard is the actual standard.