http://www.rfc-editor.org/rfc/rfc4450.txt
RFC 4450: Getting Rid of the Cruft: Report from an Experiment in Identifying and Reclassifying Obsolete Standards Documents, E. Lear, H. Alvestrand2006-03-01T23:00:00-00:00This memo documents an experiment to review and classify Proposed Standards as not reflecting documented practice within the world today. The results identify a set of documents that were marked as Proposed Standards that are now reclassified as Historic. This memo provides information for the Internet community.