RFC 2639 (rfc2639) - Page 2 of 64

Internet Printing Protocol/1

RFC 2639              IPP/1.0: Implementer's Guide             July 1999


   administrators.  The design goals document 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.  The model introduces a Printer and a Job.  The
   Job supports multiple documents per Job.  The model document also
   addresses how security, internationalization, and directory issues
   are addressed.

   The document, "Internet Printing Protocol/1.0: Encoding and
   Transport", is a formal mapping of the abstract operations and
   attributes defined in the model document onto HTTP/1.1.  It also
   defines the encoding rules for a new Internet media type called
   "application/ipp".

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

Table of Contents

  1  Introduction......................................................4
   1.1 Conformance language............................................4
   1.2 Other terminology...............................................5
  2  Model and Semantics...............................................5
   2.1 Summary of Operation Attributes.................................5
   2.2 Suggested Operation Processing Steps for IPP Objects ..........10
       2.2.1 Suggested Operation Processing Steps for all Operations..11
       2.2.1.1  Validate version number...............................11
       2.2.1.2  Validate operation identifier.........................11
       2.2.1.3  Validate the request identifier.......................11
       2.2.1.4  Validate attribute group and attribute presence and
                order.................................................12
       2.2.1.5  Validate the values of the REQUIRED Operation
                attributes............................................19
       2.2.1.6  Validate the values of the OPTIONAL Operation
                attributes............................................23
     2.2.2 Suggested Additional Processing Steps for Operations that
           Create/Validate Jobs and Add Documents.....................26
       2.2.2.1  Default "ipp-attribute-fidelity" if not supplied......26



Hastings & Manros            Informational