http://www.rfc-editor.org/rfc/rfc2378.txt
RFC 2378: The CCSO Nameserver (Ph) Architecture, R. Hedberg, P. Pomes1998-09-01T23:00:00-00:00The Ph Nameserver from the Computing and Communications Services Office (CCSO), University of Illinois at Urbana-Champaign has for some time now been used by several organizations as their choice of publicly available database for information about people as well as other things. This document provides a formal definition of the client-server protocol. This memo provides information for the Internet community. It does not specify an Internet standard of any kind.