http://www.rfc-editor.org/rfc/rfc4048.txt
RFC 4048: RFC 1888 Is Obsolete, B. Carpenter2005-04-01T23:00:00-00:00This document recommends that RFC 1888, on Open Systems Interconnection (OSI) Network Service Access Points (NSAPs) and IPv6, be reclassified as Historic, as most of it has no further value, apart from one section, which is faulty. This memo provides information for the Internet community.