"Internet-Drafts are working documents of the IETF. Any group or individual may submit a document for distribution as an Internet- Draft. These documents are valid for six months, and may be updated, replaced or obsoleted at any time. Guidelines require that an expiration date appear on every page of an Internet-Draft. It is not appropriate to use Internet-Drafts as reference material or to cite them, other than as 'working drafts' or 'works in progress.'" (zitiert von der Seite der IETF).