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.






 
RFC 2569         Mapping between LPD and IPP Protocols        April 1999


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

   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 defines
   the encoding rules for a new Internet media type called '
   application/ipp'.

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

TABLE OF CONTENTS

   1. Introduction.....................................................4
   2. Terminology......................................................5
   3. Mapping from LPD Commands to IPP Operations......................5
   3.1 Print any waiting jobs..........................................6
   3.2 Receive a printer job...........................................6
   3.2.1 Abort job.....................................................7
   3.2.2 Receive control file..........................................7
   3.2.3 Receive data file.............................................8
   3.3 Send queue state (short)........................................8
   3.4 Send queue state (long)........................................10
   3.5 Remove jobs....................................................12
   4. Mapping of LPD Control File Lines to IPP Operation and Job
      Template Attributes.............................................13
   4.1 Required Job Functions.........................................13
   4.2 Optional Job Functions.........................................14
   4.3 Required Document Functions....................................14
   4.4 Recommended Document Functions.................................16
   5. Mapping from IPP operations to LPD commands.....................16
   5.1 Print-Job......................................................16
   5.2 Print-URI......................................................18
   5.3 Validate-Job...................................................18
   5.4 Create-Job.....................................................18
   5.5 Send-Document..................................................18
   5.6 Send-URI.......................................................18
   5.7 Cancel-Job.....................................................18
   5.8 Get-Printer-Attributes.........................................19
   5.9 Get-Job-Attributes.............................................19
   5.10 Get-Jobs......................................................20
   6. Mapping of IPP Attributes to LPD Control File Lines.............20
   6.1 Required Job Functions.........................................21
   6.2 Optional Job Functions.........................................21




 
RFC 2569         Mapping between LPD and IPP Protocols        April 1999


   6.3 Required Document Functions....................................22
   7. Security Considerations.........................................23
   8. References......................................................23
   9. Authors' Addresses..............................................24
   10.Appendix A: ABNF Syntax for response of Send-queue-state (short)25
   11.Appendix B: ABNF Syntax for response of Send-queue-state (long) 26
   12.Appendix C: Unsupported LPD functions...........................27
   13.Full Copyright Statement........................................28

1. Introduction

   The reader of this specification is expected to be familiar with the
   IPP Model and Semantics specification [RFC2566], the IPP Encoding and
   Transport [RF2565], and the Line Printer Daemon (LPD) protocol
   specification [RFC1179] as described in RFC 1179.

   RFC 1179 was written in 1990 in an attempt to document existing LPD
   protocol implementations.  Since then, a number of undocumented
   extensions have been made by vendors to support functionality
   specific to their printing solutions.  All of these extensions
   consist of additional control file commands.  This document does not
   address any of these vendor extensions.  Rather it addresses existing
   practice within the context of the features described by RFC 1179.
   Deviations of existing practice from RFC 1179 are so indicated.

   Other LPD control file commands in RFC 1179 are obsolete. They are