Internet Printing Protocol/1.0: Encoding and Transport
RFC 2565

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Network Working Group                                    R. Herriot, Ed.
Request for Comments: 2565                             Xerox Corporation
Category: Experimental                                         S. Butler
                                                         Hewlett-Packard
                                                                P. Moore
                                                               Microsoft
                                                               R. Turner
                                                              Sharp Labs
                                                              April 1999

         Internet Printing Protocol/1.0: Encoding and Transport

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  It does not specify an Internet standard of any kind.
   Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

IESG Note

   This document defines an Experimental protocol for the Internet
   community.  The IESG expects that a revised version of this protocol
   will be published as Proposed Standard protocol.  The Proposed
   Standard, when published, is expected to change from the protocol
   defined in this memo.  In particular, it is expected that the
   standards-track version of the protocol will incorporate strong
   authentication and privacy features, and that an "ipp:" URL type will
   be defined which supports those security measures.  Other changes to
   the protocol are also possible.  Implementors are warned that future
   versions of this protocol may not interoperate with the version of
   IPP defined in this document, or if they do interoperate, that some
   protocol features may not be available.

   The IESG encourages experimentation with this protocol, especially in
   combination with Transport Layer Security (TLS) [RFC 2246], to help
   determine how TLS may effectively be used as a security layer for
   IPP.

Herriot, et al.               Experimental                      [Page 1]
RFC 2565            IPP/1.0: Encoding and Transport           April 1999

Abstract

   This document is one of a set of documents, which together describe
   all aspects of a new Internet Printing Protocol (IPP). IPP is an
   application level protocol that can be used for distributed printing
   using Internet tools and technologies. This document defines the
   rules for encoding IPP operations and IPP attributes into a new
   Internet mime media type called "application/ipp".  This document
   also defines the rules for transporting over HTTP a message body
   whose Content-Type is "application/ipp".

   The full set of IPP documents includes:

      Design Goals for an Internet Printing Protocol [RFC2567]
      Rationale for the Structure and Model and Protocol for the
      Internet Printing Protocol [RFC2568]
      Internet Printing Protocol/1.0: Model and Semantics [RFC2566]
      Internet Printing Protocol/1.0: Encoding and Transport (this
      document)
      Internet Printing Protocol/1.0: Implementer's Guide [ipp-iig]
      Mapping between LPD and IPP Protocols [RFC2569]

   The document, "Design Goals for an Internet Printing Protocol", takes
   a broad look at distributed printing functionality, and it enumerates
   real-life scenarios that help to clarify the features that need to be
   included in a printing protocol for the Internet. It identifies
   requirements for three types of users: end users, operators, and
   administrators. It calls out a subset of end user requirements that
   are satisfied in IPP/1.0. Operator and administrator requirements are
   out of scope for version 1.0.

   The document, "Rationale for the Structure and Model and Protocol for
   the Internet Printing Protocol", 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.

   The document, "Internet Printing Protocol/1.0: Model and Semantics",
   describes a simplified model with abstract objects, their attributes,
   and their operations that are independent of encoding and transport.
   It introduces a Printer and a Job object. The Job object optionally
   supports multiple documents per Job. It also addresses security,
   internationalization, and directory issues.

   This document "Internet Printing Protocol/1.0: Implementer's Guide",
   gives advice to implementers of IPP clients and IPP objects.

Herriot, et al.               Experimental                      [Page 2]
RFC 2565            IPP/1.0: Encoding and Transport           April 1999

   The document "Mapping between LPD and IPP Protocols" gives some
   advice to implementers of gateways between IPP and LPD (Line Printer
   Daemon) implementations.