http://www.rfc-editor.org/rfc/rfc2568.txt
RFC 2568: Rationale for the Structure of the Model and Protocol for the Internet Printing Protocol, S. Zilles1999-04-01T23:00:00-00:00This document describes IPP from a high level view, defines a roadmap for the various documents that form the suite of IPP specifications, and gives background and rationale for the IETF working group's major decisions. This memo defines an Experimental Protocol for the Internet community.