INTERNET DRAFT                 F.D. Wright, Lexmark International
          <draft-ietf-ipp-req-00.txt>
          March 24,
          <draft-ietf-ipp-req-01.txt>
          October 15, 1997                          Expires: Sept 24, 1997 April 15, 1998

                   Requirements for an Internet Printing Protocol

          STATUS OF THIS MEMO

          This document is an Internet-Draft.  Internet-Drafts are working
          documents of the Internet Engineering Task Force (IETF), its
          areas, and its working groups.  Note that other groups may also
          distribute working documents as Internet-Drafts.

          Internet-Drafts are draft documents valid for a maximum of six
          months and may be updated, replaced, or obsoleted by other
          documents at any time.  It is inappropriate to use Internet-
          Drafts as reference material or to cite them other than as ''work
          in progress.''

          To learn the current status of any Internet-Draft, please check
          the ''1id-abstracts.txt'' listing contained in the Internet-
          Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net
          (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East
          Coast), or ftp.isi.edu (US West Coast).

          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 on the Internet. The protocol is heavily
          influenced by the printing model introduced in the Document
          Printing Application (ISO/IEC 10175 DPA) standard. Although DPA
          identifies the both end user and administrative features, IPP is
          initially focused only on the end user functionality.

          The full set of IPP documents include:

          Requirements for an Internet Printing Protocol/1.0: Requirements Protocol
          Internet Printing Protocol/1.0: Model and Semantics
          Internet Printing Protocol/1.0: Security
          Internet Printing Protocol/1.0: Protocol Specification
          Rationale for the Structure and Model and Protocol for the
              Internet Printing Protocol/1.0: Directory Schema

          Wright              draft-ietf-ipp-req-00.txt            [Page 1] Protocol

             Copyright(C) The Internet Society 1997. All Rights Reserved.
          This document describes the requirements for an Internet printing
          protocol.  It describes the end-user, operator and administrator
          wants and needs in the context of printing documents from a
          variety of sources.  These sources include standard desktop
          applications (e.g. word processors, spreadsheets, and browsers),
          documents selected by reference (e.g. URL) URI) and documents created
          by batch or background applications.  Additionally, requirements
          for light-weight printer status and management and job status and
          management services will be discussed.

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                                  TABLE OF CONTENTS

          1. TERMINOLOGY..................................................5
          2. REQUIREMENTS.................................................6 REQUIREMENTS.................................................7
           2.1. END-USER.................................................6 END-USER .................................................7
             2.1.1. Finding or locating a printer........................6 printer. .......................7
             2.1.2. Create an instance of the printer....................7 printer. ...................8
             2.1.3. Viewing the status and capabilities of a printer......................7 printer. ....8
             2.1.4. Submitting a print job...............................8 job. ..............................9
             2.1.5. Viewing the status of a submitted print job..........9 job. ........10
             2.1.6. Canceling a Print Job................................9 Job ...............................10
           2.2. OPERATOR.................................................9 OPERATOR ................................................11
             2.2.1. Alerting............................................10 Alerting. ...........................................11
             2.2.2. Changing Print and Job Status.......................10 Status. ......................11
           2.3. ADMINISTRATOR...........................................10 ADMINISTRATOR ...........................................11
          3. IPP SCENARIOS...............................................12 SCENARIOS...............................................16
           3.1. PRINTER DISCOVERY.......................................13 DISCOVERY .......................................17
           3.2. DRIVER INSTALLATION.....................................14 INSTALLATION .....................................18
           3.3. SUBMITTING A PRINT JOB..................................14 JOB ..................................18
           3.4. GETTING STATUS/CAPABILITIES.............................15 STATUS/CAPABILITIES .............................19
           3.5. ASYNCHRONOUS NOTIFICATION...............................16 NOTIFICATION ...............................20
           3.6. JOB CANCELING...........................................16 CANCELING ...........................................20
          4. OBJECTIVES OF THE PROTOCOL..................................18 PROTOCOL..................................13
           4.1. SECURITY................................................18 SECURITY ................................................13
           4.2. INTERACTION WITH LPD (RFC1179)..........................18 (RFC1179) ..........................14
           4.3. EXTENSIBILITY...........................................19 EXTENSIBILITY ...........................................14
           4.4. FIREWALLS...............................................19 FIREWALLS ...............................................15
           4.5. INTERNATIONALIZATION....................................20 INTERNATIONALIZATION ....................................15
          5. REFERENCES..................................................21 REFERENCES..................................................22
          6. ACKNOWLEDGMENTS.............................................21 ACKNOWLEDGMENTS.............................................23
          7. AUTHOR'S ADDRESS............................................21 ADDRESS............................................23
          8. APPENDIX - DETAILED SCENARIOS...............................22 SCENARIOS...............................24
           8.1. PRINTER DISCOVERY WITHIN AN ENTERPRISE..................22 ENTERPRISE ..................24
           8.2. PRINTER DISCOVERY ACROSS ENTERPRISES....................24 ENTERPRISES ....................26
           8.3. PRINTER DISCOVERY ON THE INTERNET -LOGICAL OPERATIONS...25 OPERATIONS ...27
           8.4. PRINTER DISCOVERY ON THE INTERNET - AUTHENTICATION......26 AUTHENTICATION ......28
           8.5. DRIVER DOWNLOAD.........................................28 DOWNLOAD .........................................30
           8.6. SUBMITTING A PRINT JOB AS A FILE........................29 FILE ........................31
           8.7. SUBMITTING A PRINT JOB WITH TWO DOCUMENTS...............30 DOCUMENTS ...............32
           8.8. SUBMITTING A PRINT JOB AS A FILE, PRINTING FAILS........31 FAILS ........33
           8.9. SUBMITTING A PRINT JOB WITH AUTHENTICATION, PRIVACY AND
           PAYMENT......................................................32
           PAYMENT ......................................................34
           8.10. SUBMITTING A PRINT JOB WITH DECRYPTION ERROR...........33 ERROR ...........35
           8.11. SUBMITTING A PRINT JOB WITH AUTHENTICATION.............35 AUTHENTICATION .............37
           8.12. SUBMITTING A PRINT JOB GENERATED DYNAMICALLY...........36 DYNAMICALLY ...........38

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           8.13. SUBMITTING A PRINT JOB WITH A PRINTER JAM - CANCELED...37 CANCELED ...39
           8.14. SUBMITTING A PRINT JOB WITH A PRINTER JAM - RECOVERED..38 RECOVERED ..40
           8.15. SUBMITTING A PRINT JOB WITH SERVER PULL................39 PULL ................41
           8.16. SUBMITTING A PRINT JOB WITH REFERENCED RESOURCES.......40 RESOURCES .......42
           8.17. GETTING CAPABILITIES...................................41 CAPABILITIES ...................................43
             8.17.1. Submission Attributes..............................41 Attributes ..............................43
             8.17.2. Printer Capabilities...............................41 Capabilities ...............................43
           8.18. GETTING STATUS.........................................42 STATUS .........................................44
             8.18.1. Printer State/Status...............................42 State/Status ...............................44
             8.18.2. Job Status.........................................42 Status .........................................44
             8.18.3. Status of All My Jobs..............................42 Jobs ..............................44
           8.19. ASYNCHRONOUS NOTIFICATION..............................44 NOTIFICATION ..............................46
             8.19.1. Job Completion.....................................44 Completion .....................................46
             8.19.2. Job Complete with Data.............................44 Data .............................46
             8.19.3. Print Job Fails....................................44 Fails ....................................46
           8.20. CANCEL A JOB...........................................45 JOB ...........................................47
           8.21. END TO END SCENARIO - WITHIN AN ENTERPRISE.............46 ENTERPRISE .............48
           8.22. END TO END SCENARIO - ACROSS ENTERPRISES...............48 ENTERPRISES ...............50
           8.23. END TO END SCENARIO - ON THE INTERNET..................51 INTERNET ..................53

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          1.   TERMINOLOGY

          Internet Printing for the purposes of this document is the
          application of World Wide Web Internet tools, programs, servers and networks to
          allow end-users to print to a remote printer using, after initial
          setup or configuration, the same methods, operations and
          paradigms as would be used for a locally attached or a local area
          network attached printer.  This could include the use of HTTP
          servers and browsers and other applications for providing static,
          dynamic and interactive printer locating services, user
          installation, selection, configuration, print job submission,
          printer capability inquiry and status inquiry of remote printers
          and jobs.

          For the purposes of this document, a WEB Browser is software
          available from a number of sources including but not limited to
          the following: Microsoft Internet Explorer, NCSA Mosaic, Netscape
          Navigator, Sun Hot Java!.  The major task of these products is to
          use the Hypertext Transport Protocol (HTTP) to retrieve,
          interpret and display Hypertext Markup Language (HTML).  These
          products are a part of a complete Internet Printing system but
          may not be present in all implementations.

          Throughout this document, 'printer' shall be interpreted to
          include any device which is capable of marking on a piece of
          media using any available technology.  No assumption requirement is  made
          about
          for multi-tiered printing solutions involving servers (single or
          multiple) logically in front of the actual printing device and yet
          all such configurations shall be supported but shall appear to
          the end-user as only a single device.

          The IPP protocol will support the following physical
          configurations:

          - An IPP client talking to an IPP Printer object imbedded in a
            single, physical output device.
          - An IPP Client talking to a server containing one or more IPP
            Printer objects. Each Printer object is associated with
            exactly one physical output device supported by the server.
            The protocol between the server and the output devices is
            undefined.
          - An IPP Client talking to an IPP Printer object in a server.
            The Printer object is associated with one or more physical
            output devices, but the client only sees the Printer object,

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            which is an abstraction and represents all of the associated
            physical output devices. The protocol between the server and
            the physical output devices is undefined.

          Throughout this document, certain requirements will be identified
          as not being a part of version 1.0 (or V1.0) of the protocol or
          as being satisfied by means outside of IPP.  For example printer
          instance creation  IPP is not performed assumed to be
          one part, an enabler, of a complete Internet Printing solution.
          For example printer instance creation is not performed by but is
          enabled by the protocol.  Globally, none of the operator or
          administrators requirements will be included in version 1.0.
          Some of the end-
          user end-user requirements may also be excluded from
          version 1.0 and will be so noted in the description of that
          requirement.  Subsequent versions of the protocol (e.g. V2.0) may
          include support for these initially excluded requirements.

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          2.   REQUIREMENTS

          The next three sections identify the requirements of an Internet
          printing protocol from three roles assumed by humans: end-user,
          operator, and administrator.  The requirements defined here are
          only those that need to be addressed by an application level Internet printing
          protocol.  Other requirements, such as that the operator needs
          physical access to the printer (e.g. to be able to load paper or
          clear jams) are not covered by this document.  Section 3 4 contains
          scenarios which provide more detailed examples of the entire
          process including discovery, status, printing and end-of-job
          reporting.

          2.1. END-USER

          An end-user of a printer accepting jobs through the Internet is
          one of the roles in which humans act.  The end-user is the person
          that will submit a job to be printed on the printer.

          The requirements of the end-user are broken down into six
          categories: finding/locating, finding/locating a printer, creating a local instance, instance
          of a printer, viewing printer status, viewing printer
          capabilities, submitting a print job, viewing print job status,
          altering the attributes of a print job.

          2.1.1.                  Finding or locating a printer.

          end-users

          End-users want to be able to find and locate printers to which
          they are authorized to print.  They want to be able to perform
          this function using a standard WEB browser or other application.
          Multiple criteria can be applied to find the printers needed.
          These criteria include but are not limited to:

          - by name (Printer 1, Joes-color-printer, etc.)
          - by geographic location (bldg 1, Kentucky, etc.)
          - by capability or attribute (color, duplex, legal paper, etc.)

          Additionally, while it is outside of scope of IPP, end-users want
          to be able to limit the scope of their searching to:

          - inside a functional sub-domain
          - include only a particular domain (lexmark.com)
          - exclude specified domains

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          While an Internet printing protocol may not of itself include
          this function, IPP must define and enable a directory schema
          which will provide the necessary information for a directory
          service implementation to consistently represent printers by
          their IPP attributes.

          2.1.2.                  Create an instance of the printer.

          After finding the desired printer, an end-user needs to be able
          to create a local instance of that printer within the end-user
          operating system or desktop.  This local instance will vary
          depending upon the printing paradigm of the operating system.
          For example, some UNIX users will only want a queue or a
          reference to a remote printer created on their machine while
          other UNIX users and Windows NT users will want the queue and
          also the necessary icons and registry entries to be created and
          initialized.  Where required, drivers may need to be downloaded
          from some repository and installed on the computer.  All
          necessary decompressing, unpacking, and other installation
          actions should occur without end-user interaction or intervention
          excepting initial approval by the end-user.  Once the local
          instance of the printer has been installed, it shall appear to
          the end-user of operating system and to the applications running
          there as any other printer (local, local area network connected,
          or network operating system connected) on the end-user desktop or
          environment.  An Internet Printing Protocol's IPP's role in this requirement is simply to
          enable (by providing configuration information,
          driver location, etc.) the creation of the printer instance
          rather than the actual creation of the  providing
          information such as where to locate a printer instance. driver for this
          printer, as an attribute of an IPP Printer.

          2.1.3.                  Viewing the status and capabilities of a printer.

          Before using a selected printer or, in fact at any time, the end-
          user needs the ability to verify the characteristics and status
          of both printers and jobs queued for that printer.  When checking
          the characteristics of a printer, the end-user typically wants to
          be able to determine the capability of the device, e.g.:

          - loaded supported media, commonly paper, by size and type
          - paper handling capability, e.g. duplex, collating, finishing
          - color capability

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          When checking the status of the printer, printer and its print jobs, the
          end-user typically wants to be able to determine:

          - is the printer on-line?
          - what are the defaults to be used for printing?

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          When checking the status on jobs queued for the printer, the end-
          user typically wants to be able to determine:
          - how many jobs are queued for the printer?
          - how are job priorities assigned? (outside the scope of IPP)

          2.1.4.                  Submitting a print job.

          Once the desired printer has been located and installed, the end-
          user wants to print to that printer from normal applications
          using standard methods.  These normal applications include such
          programs as word processors, spreadsheets, data-base
          applications, WEB browsers, production printing applications,
          etc.  Additionaly, the end-user may want to print a file already
          existing on the end-user's computer -- "simple push."  In
          addition to printing from an application, application and simple push, the
          end-user needs to have the ability to submit a print job by
          reference.  Printing by reference is defined to mean as
          submitting a job by providing a reference to an existing
          document.  The reference, a
          URL, URI, will be resolved before the
          actual print process occurs.

          Some means shall be provided to determine if the format of a job
          matches the capability of the printer.  This can be done by one
          of the following: following (all of which are outside of scope of the IPP
          protocol):

               - the end-user selects the correct printer driver
               - the printer automatically selects the proper interpreter
               - the end-user uses some other manual procedure.

          A standard action shall be defined should the job's requirements
          not match the capabilities of the printer.

          Because the end-user does not want to know the details of the
          underlying printing process, the protocol must support job-to-
          printer capability matching (all implementations are not
          necessarily required to implement this function.)  This matching
          capability requires knowing both the printer's capabilities and
          attributes and those capabilities and attributes required by the
          job.  Actions taken when a print job requires capabilities or

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          attributes that are not available on the printer vary and can
          include but are not limited to:

          - rejecting the print job
          - redirecting the print job to another printer

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          - printing the job, accepting differences in the appearance

          Print jobs will also be submitted by background or batch
          applications without human intervention.  Any application level
          Internet printing application must support this type of printing.

          end-users

          End-users need the ability to set certain print job parameters at
          the time the job is submitted.  These parameters include but are
          not limited to:

          - number of copies
          - single or two sided printing
          - finishing
          - job priority

          2.1.5.                  Viewing the status of a submitted print job.

          After a job has been submitted to a printer, the end-user needs a
          way to view the status of that job (i.e. job waiting, job
          printing, job done) and to determine where the job is in the
          print queue.

          In addition to the need to inquire about the status of a print
          job, automatic notification of the completion of that job is also
          required.  New notification  Notification means are not defined by the protocol but
          the protocol must provide a means of enabling and disabling the
          notification.

          2.1.6.                  Canceling a Print Job

          While a job is waiting to be printing or has been started but not
          yet completed, the original creator/submitter of the print job
          (i.e. the end-user) shall be able to cancel the job entirely (job
          is waiting) or the remaining portion of it (job is printing.)
          Altering the print job itself is not a V1.0 requirement.

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          2.2. OPERATOR

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          An operator of a printer accepting jobs through the Internet is
          one of the roles in which humans act.  The operator has the
          responsibility of monitoring the status of the printer as well as
          managing and controlling the jobs at the device.  These
          responsibilities include but are not limited to the replenishing
          of supplies (ink, toner, paper, etc.), the clearing of minor
          errors (paper jams, etc.) and the re-prioritization of end-user
          jobs.  Operator requirements will not be addressed by V1.0 of the
          protocol.

          The requirements of the operator include all those of the end-
          user but may include additional privileges.  For example, an
          operator may be able to view all print jobs on a printer while
          the end-user may only see his own jobs.

          2.2.1.                  Alerting.

          One of the required operator functions is having the ability to
          discover or to be alerted to changes in the status of a printer
          particularly those changes that cause a printer to stop printing
          and to be able to correct those problems.  As such, an Internet
          printing protocol shall be able to alert a designated operator or
          operators to these conditions such as ‘out 'out of paper’, ‘out paper', 'out of
          ink’,
          ink', etc.  Additionally. the operator shall be able to,
          asynchronous to other printer activity, inquire as to a printer's
          or a job's status.

          2.2.2.                  Changing Print and Job Status.

          Another of the required operator functions is the ability to
          affect changes to printer and job status remotely.  For example,
          the operator will need to be able to re-prioritize or cancel any
          print jobs on a printer to which the operator has authority.

          2.3. ADMINISTRATOR (NOT REQUIRED FOR V1.0)

          An administrator of a printer accepting jobs through the Internet
          is one of the roles in which humans act.  The administrator has
          the responsibility of creating the printer instances and
          controlling the authorization of other

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          Administrator requirements will not be addressed by V1.0 of the
          protocol.

          The requirements of the administrator include all those of the
          end-user and, in some environments, some or all of those of the
          operator.  Minimally, the administrator must also have the tools,
          programs, utilities and supporting protocols available to be able
          to:

          - create an instance of a printer
          - create, edit and maintain the list of authorized end-users
          - create, edit and maintain the list of authorized operators
          - create, edit and maintain the list of authorized
             administrators
          - create, customize, change or otherwise alter the manner in
             which the status capabilities and other information about
             printers and jobs are presented
          - create, customize, or change other printer or job features
          - administrate billing or other charge-back mechanisms
          - create sets of defaults
          - create sets of capabilities

          The administrator must have the capability to perform all the
          above tasks locally or remotely to the printer.

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          3.   IPP SCENARIOS

          Each   OBJECTIVES OF THE PROTOCOL

          The protocol to be defined by an Internet printing working group
          will address the requirements of the scenarios in this section describes a specific IPP
          operation, such as submitting a print job. Section 8.0 contains
          several detailed flows for each scenario to provide additional
          detail. end-user (V1.0).  It will
          not, at least initially, address the operator or administrator
          requirements (V2.0).

          The examples should not protocol defined shall be considered exhaustive, but
          illustrative independent of the functions and features required in the
          protocol.  Flows are intended to be protocol neutral. It is not
          assumed that all operating system
          of both the functions client and features described in these
          scenarios will necessarily be supported directly by IPP or in
          version 1.0 the server.  Generally, any platform
          capable of IPP.

          These scenarios support one supporting a WEB Browser should be capable of three physical configurations:

          - An IPP client talking to an IPP Printer object imbedded in being a
            single, physical output device.
          - An IPP Client talking to
          client.  Generally, any platform providing a server containing one or more IPP
            Printer objects. Each Printer object is associated with
            exactly one physical output device supported by the server.
            The protocol between the WEB/HTTP server and the output devices is
            undefined.
          - An IPP Client talking to an IPP Printer object in
          printing services should be capable of being a server.
            The Printer object  Usage of
          the WEB Browser and Server is associated with one or more physical
            output devices, but not required for IPP; the client only sees operating
          system, operating system extensions or other applications may
          provide IPP functionality directly.

          In many environments such as Windows 95, Windows NT and OS/2, the Printer object,
            which
          print data is an abstraction created and represents all of transmitted to the associated
            physical output devices. The protocol between printer on the server fly
          rather than being created, spooled and then transmitted to the physical output devices
          printer (a typical UNIX method.)  The Internet Printing Protocol
          must properly handle this methodology and make this transparent
          to the end-user.

          3.1. SECURITY

          It is undefined.

          Clients required that the Internet Printing Protocol be able to
          operate within a secure environment. Wherever possible, IPP ought
          to make use of existing security protocols and Printers may or may services. IPP will
          not invent new security features when the requirements described
          in this document can be behind firewalls, i.e. not
          directly on met by existing protocols and services.
          Examples of such services include Transport Layer Security (TLS)
          and HTTP Digest Authentication.

          Since we cannot anticipate the Internet. At least security levels or the following should specific
          threats that any given IPP print administrator may be
          considered:

          - Client concerned
          with, IPP must be capable of operating with different security
          mechanisms and Printer policies as required by the individual
          installation. The initial security needs of IPP are behind derived from
          two primary considerations. First, the same firewall.
          - Client is behind one firewall and Printer is behind another.
          - Client is behind a firewall and Printer is not.
          - Printer is behind a firewall printing environments
          describes in this document take into account that the client, the
          Printer, and the client is not.
          - Neither Client nor Printer document to be printed may all exist in
          different security domains. When objects are behind a firewall.

          See draft-ietf-ipp-security-01.txt in different
          security domains the requirements for more details on these and
          other configurations of clients, servers authentication and firewalls. message

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          3.1. PRINTER DISCOVERY

          Client                                               Directory
          Service                                                Service

           +----------------------------------------------------------- >
              give me information on printers with these characteristics

           < -----------------------------------------------------------+
               Information on Printers matching these characteristics April 15, 1998
             Copyright(C) The objective Internet Society 1997. All Rights Reserved.
          protection are much stronger than when they are all in the same
          domain.

          Secondly, the sensitivity and value of printer discovery is to locate printers that
          meet the client’s requirements. The directory Service should content being printed
          will vary from one instance of a print job to another. For
          example, a publicly available document does not need the same
          level of protection as a payroll document does.  Message
          protection requirements include data origin authentication,
          privacy, integrity, and non-repudiation.

          3.2. INTERACTION WITH LPD (RFC1179)

          Many versions of UNIX and in fact other operating systems provide enough information
          a means of printing as described in RFC1179 (Line Printer Daemon
          Protocol.)  This document describes the file formats for the client to make an initial
          choice. The client may have to connect to each individual Printer
          offered to get more detail.

          The actual protocol used between client
          control and Directory or Name
          service is considered outside data files as well as the scope messages used by the
          protocol.  Because of IPP. Printer Discover
          is included in the scenarios simplistic approach taken by this
          protocol, many manufacturers have include proprietary
          enhancements and extensions to provide 'lpd.'  Because of this divergence
          and due to other requirements described in this document, there
          is no requirement for the
          directory schema for IPP Printers backward compatibility or interoperability
          with 'lpd'.  However, a mapping of LPD functionality and to further define Printer
          attributes.

          Characteristics that might IPP
          functionality shall be considered when locating provided so as to enable a Printer
          include: gateway between
          LPD and IPP.

          3.3. EXTENSIBILITY

          The Internet Printing Protocol shall be extensible by several
          means that facilitates interoperability and prevents
          implementation collisions:

               - capabilities by providing a process whereby implementers can submit
               proposals for registration of the Printer, e.g. PDLs supported
          - physical location, e.g. in building 010
          - driver required new attributes and location
          - cost per page to print
          - whether or not printer is access controlled
          - whether or not usage requires client authentication new
               enumerated values for existing attributes.

               - whether or not Printer can that require review and approval.  The Internet Assigned
               Number Authority (IANA) will be authenticated
          - whether or not payment is required the repository for printing
          - maximum job size (spool size)
          - whether or not Printer support compression such
               accepted registration proposals after review.

               - whether or that do not Printer supports encryption
          - administrative limits on this Printer
               - maximum number of copies per job
               - maximum number of pages per job require review and approval.  IANA will be the
               repository for such registrations.

                               Expires: Sept 24, 1997
          Responses could additionally include:

          - how to get more information
               - web page April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               - telephone number by providing syntax in the protocol so that implementers
               may add private (i.e. unregistered) attributesand
               enumerated attribute values.

               - help desk

          3.2. DRIVER INSTALLATION

          Client                                               Printer

           +----------------------------------------------------------- >
              Where can I find a driver & software to install it?

           < -----------------------------------------------------------+
               URLs for drivers by providing versioning and install software

          Driver here refers negotiation so as to the code installed enable
               future implementations of IPP to interoperate with
               implementations of version 1.0 of IPP.

          3.4. FIREWALLS

          As stated in the client operating
          system end-user requirements section, Internet printing
          shall by definition support printing from one enterprise to
          another.  As such, the Internet printing protocol must be capable
          of passing through firewalls and/or proxy servers (where enabled
          by the firewall administrator) preferably without modification to generate
          the print data stream for existing firewall technology.

          3.5. INTERNATIONALIZATION

          Users of Internet printing will come from all over the intended
          printer. The actual details for installing a printer driver are
          operating system independent world.  As
          such, where appropriate, internationalization and are beyond localization
          will be enabled for the scope of IPP.
          However, an protocol.

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          4.   IPP printer or SCENARIOS

          Each of the scenarios in this section describes a directory service advertising an specific IPP
          Printer
          operation, such as submitting a print job. Section 9.0 contains
          several detailed flows for each scenario to provide additional
          detail.  The examples should not be capable considered exhaustive, but
          illustrative of telling a client what drivers the functions and features required in the
          protocol.  Flows are
          required, where they can intended to be found, protocol neutral. It is not
          assumed that all of the functions and provide pointers to
          installation instructions, installation code features described in these
          scenarios will necessarily be supported directly by IPP or initialization
          strings required to install in
          version 1.0 of IPP.

          See the driver.

          3.3. SUBMITTING A PRINT JOB

          Client IPP Printer

           +----------------------------------------------------------- >
              Here is a Print Job
               - Job Model and Semantics document attributes
               - Print data

           < -----------------------------------------------------------+
               Response for details on
          configurations of clients, servers and firewalls.

                               Expires: Sept 24, 1997 April 15, 1998
             Copyright(C) The protocol must support Internet Society 1997. All Rights Reserved.
          4.1. PRINTER DISCOVERY

          Client                                               Directory
          Service                                                Service

           +----------------------------------------------------------- >
              give me information on printers with these sources characteristics

           < -----------------------------------------------------------+
               Information on Printers matching these characteristics

          The objective of client data:

          - Print data printer discovery is a file submitted with to locate printers that
          meet the job
          - Print data is generated on client's requirements. The Directory Service should
          provide enough information for the fly by client to make an application
          - Print data initial
          choice. The client may have to connect to each individual Printer
          offered to get more detail.  Not all information available from
          the Directory Service is a file referenced by a URL obtained using IPP; some information may
          be administratively provided.

          The actual protocol must handle overrun conditions in the printer and
          must support overlapped printing used between client and downloading of the file in
          devices that are unable to spool files before printing them.

          Every print request will have a response. Responses will indicate
          success Directory or failure Name
          Service is considered outside the scope of IPP. Printer Discover
          is included in the request and scenarios to provide information on
          failures when they occur. Responses would include things like:

          - Got the print job and queued it
          - Got requirements for the print job
          directory schema for IPP Printers and am printing it
          - Got the print job, started to print it, but printing failed
               - why it failed (e.g. unrecoverable PostScript error)
               - state of the printer
               - how much printed
          - Got the print job but couldn’t print it
               - why it can’t further define Printer
          attributes.

          Characteristics that might be printed
               - state of the printer
          - Got the print job but don’t know what to do with it
          - Didn’t get considered when locating a complete print job (e.g. communication failure)

          3.4. GETTING STATUS/CAPABILITIES

          Client                                               IPP Printer

           +----------------------------------------------------------- >
              Get status and/or capabilities of Printer

           < -----------------------------------------------------------+
               Status/Capabilities

          Clients will need to get information about
          include:

          - Static capabilities of the device (e.g. marking technology) Printer, e.g. PDLs supported
          - physical location, e.g. in building 010
          - Dynamic state of driver required and location
          - cost per page to print (outside the Printer (e.g. out scope of paper) IPP)
          - State of a specific job owned by this client

                               Expires: Sept 24, 1997 whether or not printer is access controlled
          - State of all jobs owned by this whether or not usage requires client authentication
          - queued whether or not Printer can be authenticated
          - whether or not payment is required for printing
               - completed
          - Job submission attributes supported/required
               - scheduling attributes (e.g. priority)
               - production attributes (e.g. number (outside the
            scope of copies)

          3.5. ASYNCHRONOUS NOTIFICATION

          Client                                               IPP Printer

           +----------------------------------------------------------- >
              Use IPP)
          - maximum job size (spool size) (outside the following method to notify me scope of IPP)
          - whether or not Printer events

                                        .
                                        .
                                        .
           < -----------------------------------------------------------+
               Asynchronous notification support compression (outside the scope
            of IPP)
          - whether or not Printer event

          Clients must be able to request asynchronous notification for supports encryption
          - administrative limits on this Printer events such as

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               - maximum number of copies per job completion
               - a fatal error that requires the maximum number of pages per job

          Responses could additionally include:

          - how to be resubmitted get more information
               - a condition that severely impacts a queued job for this client
               e.g. printer is out of paper

          Note: end-user notification is a V1.0 requirement while operator
          notification is for V2.0.

          3.6. JOB CANCELING web page
               - telephone number
               - help desk

          4.2. DRIVER INSTALLATION

          Client                                               IPP                                               Printer

           +----------------------------------------------------------- >
              Modify the named job as indicated

                               Expires: Sept 24, 1997
              Where can I find a driver & software to install it?

           < -----------------------------------------------------------+
               Response (did it or not)

          Clients must be able
               URIs for drivers and install software

          Driver here refers to make changes the code installed in the client operating
          system to jobs which have been
          submitted generate the print data stream for the intended
          printer. The actual details for installing a printer driver are
          operating system independent and are queued for printing.  Changing beyond the scope of job
          attributes IPP.
          However, an IPP printer or a directory service advertising an IPP
          Printer should also be supported.  Job modifications, holding
          and releasing capable of jobs will not telling a client what drivers are
          required, where they can be found, and provide pointers to
          installation instructions, installation code or initialization
          strings required in to install the driver.

          4.3. SUBMITTING A PRINT JOB

          Client                                               IPP v1.0. Printer

           +----------------------------------------------------------- >
              Here is a Print Job
               - Job attributes
               - Print data

           < -----------------------------------------------------------+

                               Expires: Sept 24, 1997
          4.   OBJECTIVES OF THE PROTOCOL April 15, 1998
             Copyright(C) The protocol to be defined by an Internet printing working group
          will address the requirements of the end-user (V1.0).  It will
          not, at least initially, address the operator or administrator
          requirements (V2.0). Society 1997. All Rights Reserved.
               Response

          The protocol defined shall be independent of the operating system must support these sources of both the client and the server.  Any platform capable of
          supporting data:

          - Print data is a WEB Browser shall be supported as file submitted with the job
          - Print data is generated on the fly by an application
          - Print data is a client.  Any
          platform providing file referenced by a WEB/HTTP server URI

          The protocol must handle overrun conditions in the printer and
          must support overlapped printing services shall
          be supported as and downloading of the file in
          devices that are unable to spool files before printing them.

          Every print request will have a server.  Usage response. Responses will indicate
          success or failure of the WEB Browser request and Server is
          not required for IPP; the operating system, operating system
          extensions or other applications may provide IPP functionality
          directly.

          In many environments such as Windows 95, Windows NT and OS/2, information on
          failures when they occur. Responses would include things like:

          - Got the print data is created job and transmitted to the printer ''on queued it
          - Got the
          fly'' rather than being created, spooled print job and then transmitted am printing it
          - Got the print job, started to print it, but printing failed
               - why it failed (e.g. unrecoverable PostScript error)
               - state of the printer (a typical UNIX method.)  The Internet Printing
          Protocol must properly handle this methodology and make this
          transparent to
               - how much printed
          - Got the end-user.

          4.1. SECURITY

          Security definitions, issues and requirements are discussed in a
          separate draft.  See ''draft-ietf-ipp-security-00.txt'' for these
          requirements.  Authentication shall print job but couldn't print it
               - why it can't be required in V1.0.
          Privacy, payment, and other aspects of security are not required
          for V1.0.

          4.2. INTERACTION WITH LPD (RFC1179)

          Many versions printed
               - state of UNIX and in fact other operating systems provide the printer
          - Got the print job but don't know what to do with it
          - Didn't get a means complete print job (e.g. communication failure)

          4.4. GETTING STATUS/CAPABILITIES

          Client                                               IPP Printer

           +----------------------------------------------------------- >
              Get status and/or capabilities of printing as described in RFC1179 (Line Printer Daemon
          Protocol.)  This document describes the file formats for

           < -----------------------------------------------------------+
               Status/Capabilities

          Clients will need to get information about

          - Static capabilities of the
          control and data files as well as device
          - Dynamic state of the messages used Printer (e.g. out of paper)

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          - State of a specific job owned by the
          protocol.  Because this client
          - State of the simplistic approach taken all jobs owned by this
          protocol, many manufacturers have include proprietary
          enhancements and extensions client
               - queued
               - printing
               - completed
          - Job submission attributes supported/required
               - scheduling attributes (e.g. priority)
               - production attributes (e.g. number of copies)

          4.5. ASYNCHRONOUS NOTIFICATION

          Client                                               IPP Printer

           +----------------------------------------------------------- >
              Use the following method to 'lpd.'  Because notify me of this divergence
          and due Printer events

                                        .
                                        .
                                        .
           < -----------------------------------------------------------+
               Asynchronous notification of Printer event

          Clients must be able to other requirements described in request asynchronous notification for
          Printer events such as

          - job completion
          - a fatal error that requires the job to be resubmitted
          - a condition that severely impacts a queued job for this document, there

                               Expires: Sept 24, 1997 client
               e.g. printer is no out of paper

          Note: end-user notification is a V1.0 requirement while operator
          notification is for backward compatibility or interoperability
          with 'lpd'.  However, a mapping of LPD functionality and V2.0.

          4.6. JOB CANCELING

          Client                                               IPP
          functionality shall be provided so Printer

           +----------------------------------------------------------- >
              Cancel the named job as to enable a gateway between
          LPD and IPP.

          4.3. EXTENSIBILITY indicated

                               Expires: April 15, 1998
             Copyright(C) The Internet Printing Protocol shall Society 1997. All Rights Reserved.
           < -----------------------------------------------------------+
               Response (did it or not)

          Similarly clients must be extensible by several
          means that facilitates interworking able to make changes to jobs which have
          been submitted and prevents implementation
          collisions:

               - by providing a process whereby implementers can submit
               proposals are queued for registration printing.  Changing of new attributes, new enumerated
               values for existing job
          attributes should also be supported.  Job modifications, holding
          and new tags releasing of jobs are not requirements for attributes
               or attribute values

               - that require review and approval. IPP v1.0.

                               Expires: April 15, 1998
             Copyright(C) The Internet Assigned
               Number Authority (IANA) will Society 1997. All Rights Reserved.
          5.   COPYRIGHT

          Copyright(C) The Internet Society 1997. All Rights Reserved.

          This document and translations of it may be the repository for such
               accepted registration proposals after review.

               - that do not require review copied and approval.  IANA will furnished
          to others, and derivative works that comment on or otherwise
          explain it or assist in its implementation may be the
               repository for such registrations.

               - by providing syntax prepared,
          copied, published and distributed, in the protocol so whole or in part, without
          restriction of any kind, provided that implementers
               may add private (i.e. unregistered) attributes, enumerated
               attribute values, the above copyright notice
          and tags.

               - by providing versioning this paragraph are included on all such copies and negotiation so derivative
          works.  However, this document itself may not be modified in any
          way, such as by removing the copyright notice or references to enable
               future implementations of IPP to interoperate with
               implementations of version 1.0
          the Internet Society or other Internet organizations, except as
          needed for the  purpose of IPP.

          4.4. FIREWALLS

          As stated developing Internet standards in which
          case the end-user requirements section, Internet printing
          shall by definition support printing from one enterprise to
          another.  As such, procedures for copyrights defined in the Internet printing protocol
          Standards process must be capable
          of passing through firewalls and/or proxy servers (where enabled
          by the firewall administrator) preferably without modification followed, or as required to
          the existing firewall technology.

                               Expires: Sept 24, 1997
          4.5. INTERNATIONALIZATION

          Users of Internet printing will come from all over the world.  As
          such, where appropriate, internationalization translate
          it into languages other than English.

          The limited permissions granted above are perpetual and localization will not
          be enabled for revoked by the protocol.

                               Expires: Sept 24, 1997
          5. Internet Society or its successors or assigns.

          This document and the information contained herein is provided on
          an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET
          ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR
          IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE
          OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY
          IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
          PURPOSE."

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          6.   REFERENCES

          RFC1179 - Line Printer Daemon Protocol
          RFC1759 - Printer MIB
          ISO/IEC 10175, Document Printing Application

          6.

          7.   ACKNOWLEDGMENTS

          This document draws heavily from preliminary work done by others
          especially in the Printer Working Group (PWG).  The author
          gratefully acknowledges the specific contributions of:

          Scott Isaacson                   Roger Debry
          Novell                           IBM
          scott_isaacson@novell.com
               _                           rdebry@us1.ibm.com                                           Roger Debry          scott isaacson@novell.com

          Carl-Uno Manros                  Robert Herriot
          Xerox                            Sun
          manros@cp10.es.xerox.com         Robert.Herriot@eng.sun.com

          Tom Hastings                     Peter Zehler
          Xerox                            Xerox
          hastings%cp10.es.xerox.com       Peter_Zehler@wb.xerox.com

          7.
          hastings@cp10.es.xerox.com       pzehler@channels.mc_.xerox.com

          8.   AUTHOR'S ADDRESS

          F.D. (Don) Wright
          Lexmark International
          C14/035-3
          740 New Circle Rd
          Lexington, KY  40511  40550

          Phone: 606-232-4808
          Fax: 606-232-6740
          E-mail: don@lexmark.com

                               Expires: Sept 24, 1997
          8. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.   APPENDIX - DETAILED SCENARIOS

          The following are more detailed scenarios illustrating how the
          Internet Printing Protocol is expected to be used. used as a part of a
          complete Internet Printing system.  Some parts of the scenarios
          include concepts, functions and information that may be outside
          of the scope of version 1.0 of IPP (e.g. cost per page, payments
          means available, etc.)  The information contained herein is meant
          to be generic.  There may not be an exact wording or terminology
          match between these scenarios and the implementation documents.

          8.1.

          9.1. PRINTER DISCOVERY WITHIN AN ENTERPRISE

          A user wants to find a color Postscript printer in his/her
          enterprise  which will print transparencies. The client,
          directory service, and Printer printer are all behind the same corporate
          firewall. Because color foils are expensive, Printers printers of this
          type are access controlled and require an account to be
          established so that printing can be billed back to the using
          department. Note the request to find a Printer printer usable by Dept.
          J15. Drivers for all supported Printers printers are available from the
          server they are associated with. A help desk is provided for end
          user support.  The printer is unattended.

          Client                                  Directory Service

             +---------------------------------------------------------- >
               Find a Printer printer with these characteristics
               - prints color, prints transparencies
               - prints Postscript
               - is in building 003
               - usable accessible by department J15 the client

             < ----------------------------------------------------------+
               Printer ‘                       ‘Color-A’                                ’ "Color-A"
               - prints color, prints transparencies
               - prints Postscript
               - in room H-6, building 003
               - driver ABC-Postscript-V1.3 required, here is URL URI
               - cost is $.45 per page for color transparencies
               - limit is 10 pages per job
               - authentication required to use printer

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               - printer is unattended
               - help desk at x5001

                               Expires: Sept 24, 1997

                Printer ‘                        ‘Color-B’                                 ’ "Color-B"
               - prints color, prints transparencies
               - prints Postscript
               - in room J-10, building 003
               - driver XYZ-Postscript-V2.4 required, here is URL URI
               - cost is $1.25 page for color transparencies
               - limit is 5 pages per job
               - authentication is required to use printer
               - printer is unattended
               - help desk at x5001

                               Expires: Sept 24, 1997
          8.2. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.2. PRINTER DISCOVERY ACROSS ENTERPRISES

          A user in Company A wants to find a public printer in a business
          partner’s
          partner's enterprise (Company B) on which to print a purchase
          order. The client is behind one corporate firewall and the
          directory service and the Printer printer are behind a different
          corporate firewall. Drivers for all supported Printers printers are
          available from the server they are associated with. A web page is
          provided for end user support for public printers.

          Client                        Company B Directory Service

             +---------------------------------------------------------- >
               Find a Printer printer with these characteristics
               - prints black and white
               - is in El Segundo, building A
               - is a public printer (accessible from outside firewall)

             < ----------------------------------------------------------+
               Printer ‘                       ‘Public-A’                                 ’ "Public-A"
               - prints black and white
               - prints Postscript
               - in El Segundo, room H-6, building A
               - driver ABC-Postscript-V1.3 required, here is URL URI
               - printer is public
               - help available at http://xerox/elSegundo/publicPrinters

                Printer ‘                        ‘Public-B’                                  ’ "Public-B"
               - prints black and white
               - prints PCL/5e
               - is in El Segundo, room J-10, building A
               - driver XYZ-PCL-V2.4 required, here is URL URI
               - printer is public
               - help available at http://xerox/elSegundo/publicPrinters

                               Expires: Sept 24, 1997
          8.3. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.3. PRINTER DISCOVERY ON THE INTERNET -LOGICAL OPERATIONS

          A student wants to print a paper on a printer at his neighborhood
          Kinko’s
          Kinko's print shop. The report was written using Microsoft Word.
          The student is interested in the cost of printing since his
          budget is limited. Note the use of logical operators to find this
          information.

          Client                          Kinko’s                          Kinko's Directory Service

             +---------------------------------------------------------- >
               Find a Printer with these characteristics
               - prints color or black and white
               - costs less than $.50 per page
               - tell me about resolution and marking technology

             < ----------------------------------------------------------+
               Printer ‘                       ‘Color-A’                                ’ "Color-A"
               - prints color
               - 600 dpi laser printer
               - prints Postscript
               - driver ABC-Postscript-V1.3 required, here is URL URI
               - cost is $.50 per page for color
               - payment required prior to submitting print job
               - here is URL URI for more information on Kinko’s Kinko's

                Printer ‘                        ‘Mono-B’                                ’ "Mono-B"
               - prints black and white
               - 300 dpi inkjet printer
               - prints Postscript
               - driver XYZ-Postscript-V2.4 required, here is URL URI
               - cost is $0.35 page for black and white
               - payment required prior to submitting print job
               - here is URL URI for more information on Kinko’s Kinko's

                               Expires: Sept 24, 1997
          8.4. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.4. PRINTER DISCOVERY ON THE INTERNET - AUTHENTICATION

          An executive in her hotel room is finishing an important
          presentation on her laptop computer. She connects to a local
          print shop through the web to get a copy of her charts printed
          for tomorrow’s tomorrow's presentation. She must find a print shop that is
          convenient to her hotel and can print color transparencies. She
          wants to be sure that the printer can be authenticated and can
          accept encrypted data.

          Client                        SirSpeedy Directory Service

             +---------------------------------------------------------- >
               Find a Printer with these characteristics
               - prints color transparencies
               - is in Downtown Boulder, Colorado
               - Printer can be authenticated
               - Printer supports encryption

               Give me the Printer’s public key

               Tell me when you are open for business

             < ----------------------------------------------------------+
               Printer ‘                       ‘Color-A’                                ’ "Color-A"
               - prints color transparencies
               - prints Postscript
               - driver ABC-Postscript-V1.3 required, here is URL URI
               - payment required prior to submitting print job
               - Printer can be authenticated
               - Data can be encrypted

               - Printer’s public key = ‘                                         ‘CG&89Hj$#004?’                                                        ’
               - Located at 1670 Pearl Street, Boulder, CO
               - This Branch is open 24 hours a day

               Printer ‘                       ‘Color-B’                                ’ "Color-B"
               - prints color transparencies
               - prints Postscript
               - driver ABC-Postscript-V1.3 required, here is URL URI
               - payment required prior to submitting print job

                               Expires: Sept 24, 1997
               - Printer can be authenticated

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               - Data can be encrypted

               - Printer’s public key = ‘                                         ‘CG&7%%j$#003’                                                       ’
               - Located at 1220 Arapahoe, Boulder, CO
               - This Branch is open from 9:00am to 6:30pm

                               Expires: Sept 24, 1997
          8.5. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.5. DRIVER DOWNLOAD

          An end user in an enterprise wants to print a lengthy report on a
          newly installed high speed PostScript printer. Since she will
          likely use this printer often, she would like to download a
          driver and install it on her workstation. She is running Windows
          95.  Note:  Driver download is not a V1.0 requirement.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Tell me where to find print drivers for you
               I am using Windows 95 version 1.2

             < ----------------------------------------------------------+
               Driver install file is at
               http://www.ibm.com/drivers/NP12a/Win95

                               Expires: Sept 24, 1997
          8.6. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.6. SUBMITTING A PRINT JOB AS A FILE

          An end-user wants to submit a print job. The print file already
          exists on his workstation. The client and Printer printer are behind the
          same corporate firewall. The printer is available to anyone
          behind the firewall and no authorization or authentication is
          required. The data is pushed to the Printer. printer. The Printer printer is
          capable of spooling the output. No errors occur.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - document is in Postscript format
               - here is the document to print

             < ----------------------------------------------------------+
               Print job accepted and spooled
               - job id = #12345
               - current state of print job = spooled
               - submission time = 02/12/97, 15:35
               - printer state = printing

                               Expires: Sept 24, 1997
          8.7. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.7. SUBMITTING A PRINT JOB WITH TWO DOCUMENTS

          An end-user wants to submit a print job. The print file already
          exists on his workstation. The client and Printer printer are behind the
          same corporate firewall. The printer is available to anyone
          behind the firewall and no authorization or authentication is
          required. The data is pushed to the Printer. printer. The job consists of
          two separate documents. The Printer printer is capable of spooling the
          output. No errors occur.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - document #1 is in Postscript format
               - here is the document to print
               - document #2 is in Postscript format
               - here is the document to print

             < ----------------------------------------------------------+
               Print job accepted and spooled
               - job id = #12345
               - current state of print job = spooled
               - submission time = 02/12/97, 15:35
             +---------------------------------------------------------- >
               - printer state = printing here is the document to print

             < ----------------------------------------------------------+
               - OK

             +---------------------------------------------------------- >
               - here is the document to print, it is the last document.

             < ----------------------------------------------------------+
               - OK

                               Expires: Sept 24, 1997
          8.8. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.8. SUBMITTING A PRINT JOB AS A FILE, PRINTING FAILS

          An end-user wants to submit a print job. The print file already
          exists on his workstation. The client and Printer printer are behind the
          same corporate firewall. The printer is available to anyone
          behind the firewall and no authorization or authentication is
          required. The data is pushed to the Printer. printer. The Printer printer is not
          capable of spooling the output so it begins printing while still
          receiving the file. An error occurs and the printer cannot
          complete printing (in this case the user requires A4 paper and
          that paper size is not available on the printer.)

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - document is in Postscript format
               - here is the document to print

             < ----------------------------------------------------------+
                    Print job accepted

               - printing failed
               - current state of print job = canceled (A4 not available)
               - submission time = 02/12/97, 15:35
               - printer state = ready

                               Expires: Sept 24, 1997
          8.9. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.9. SUBMITTING A PRINT JOB WITH AUTHENTICATION, PRIVACY AND
          PAYMENT

          A traveling executive needs to print a set of transparencies for
          an important business meeting. The charts are in Lotus Freelance
          format on his notebook computer. He has located a SirSpeedy print
          shop near his hotel that will print color transparencies. Because
          the information on the charts is sensitive, he wants to be sure
          that his data is sent to the Printer in an encrypted format. He
          also wants to authenticate the Printer. The Printer also
          authenticates the user. Payment occurs across the Internet.

          Client                                               IPP Printer   +----------------------------------------
          ------------------

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+

               Mutual authentication and exchange of secret keys

             +---------------------------------------------------------- >
               Here is a print job (encrypted)
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - tell me where to pick up output
               - document is in Postscript format
               - here is the document to print (encrypted)

             < ----------------------------------------------------------+
               Print job accepted and spooled (encrypted)
               - job id = #12345
               - current state of print job = spooled
               - submission time = 02/12/97, 15:35
               - printer state = printing
               - payment required to proceed with job
               - pick up at 230 East Main after 3:30pm today

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Payment transaction

                               Expires: Sept 24, 1997
          8.10. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.10.                                SUBMITTING A PRINT JOB WITH DECRYPTION ERROR

          A traveling executive needs to print a set of transparencies for
          an important business meeting. The charts are in Lotus Freelance
          format on his notebook computer. He has located a SirSpeedy print
          shop near his hotel that will print color transparencies. Because
          the information on the charts is sensitive, he wants to be sure
          that his data is sent to the Printer printer in an encrypted format. He
          also wants to authenticate the Printer. printer. The Printer printer also
          authenticates the user. Payment occurs across the Internet. An
          error occurs during decryption.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Mutual authentication and exchange of secret keys

             +---------------------------------------------------------- >
               Here is a print job (encrypted)
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - tell me where to pick up output
               - document is in Postscript format
               - here is the document to print (encrypted)

             < ----------------------------------------------------------+
               Print job accepted and spooled (encrypted)
               - job id = #12345
               - current state of print job = spooled
               - submission time = 02/12/97, 15:35
               - printer state = printing
               - payment required to proceed with job
               - pick up at 230 East Main after 3:30pm today

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Payment transaction

                               Expires: Sept 24, 1997
               .

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               .
               .
             < ----------------------------------------------------------+
               Asynchronous response (email in this case)
               - decryption failed on job #12345
               - no pages printed
               - current state of job = aborted

                               Expires: Sept 24, 1997
          8.11. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.11.                                SUBMITTING A PRINT JOB WITH AUTHENTICATION

          An end-user wants to submit a print job. The print file already
          exists on his workstation. The client and Printer printer are behind the
          same corporate firewall. The printer is available to anyone
          behind the firewall but authentication and authorization is
          required. Authorization takes place using the authenticated end-
          user’s
          user's name. The data is pushed to the Printer. printer. The Printer printer is
          capable of spooling the output.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Authentication

               Note: An authentication failure would end the transaction at
                         this point.

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - tell me where to pick up output
               - document is in Postscript format
               - here is the document to print

             < ----------------------------------------------------------+
               Print job accepted and spooled
               - job id = #12345
               - current state of print job = spooled
               - submission time = 02/12/97, 15:35
               - printer state = printing

                               Expires: Sept 24, 1997
          8.12. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.12.                                SUBMITTING A PRINT JOB GENERATED DYNAMICALLY

          An end-user wants to submit a print job. The print data is
          generated dynamically and is being transmitted by a printer
          driver on the client workstation as available. The client and
          Printer
          printer are behind the same corporate firewall. The printer is
          available to anyone behind the firewall and no authentication and
          authorization is required. The data is pushed to the Printer. printer. The
          Printer
          printer is capable of spooling the output. No error occurs.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - document is in Postscript format
               - here is the print job

             < ----------------------------------------------------------+
               Print data accepted and spooling started
               - job id = #12345
               - current job state = spooled
               - submission time = 02/12/97, 15:35
               - printer state = printing

                               Expires: Sept 24, 1997
          8.13. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.13.                                SUBMITTING A PRINT JOB WITH A PRINTER JAM - CANCELED

          An end-user wants to submit a print job. The print data is
          generated dynamically and is being transmitted by a printer
          driver on the client workstation as available. The client and
          Printer
          printer are behind the same corporate firewall. The printer is
          available to anyone behind the firewall and no authentication and
          authorization is required. The data is pushed to the Printer. printer. The
          Printer
          printer is not capable of spooling the output. The printer jams
          notifies the user and the user chooses to cancel the job.

          Client                                            IPP Printer
             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - document is in Postscript format
               - here is the document to print

             < ----------------------------------------------------------+
               Print data accepted and printing started
               - job id = #12345

             +---------------------------------------------------------- >
               - What is the status of print job #12345?

             < --------------------------------------------------------- +
               - Job #12345 accepted but printer jammed, cannot continue

             +---------------------------------------------------------- >
               - Cancel job #12345

             * Printer flushes remaining data
             < ----------------------------------------------------------+
                Print job terminated
               - current job state = canceled
               - submission time = 02/12/97, 15:35
               - printer state = jammed

                               Expires: Sept 24, 1997
          8.14. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.14.                                SUBMITTING A PRINT JOB WITH A PRINTER JAM - RECOVERED

          An end-user wants to submit a print job. The print data is
          generated dynamically and is being transmitted by a printer
          driver on the client workstation as available. The client and
          Printer
          printer are behind the same corporate firewall. The printer is
          available to anyone behind the firewall and no authentication and
          authorization is required. The data is pushed to the Printer. printer. The
          Printer
          printer is not capable of spooling the output. The printer jams,
          notifies the user and the user clears the jam and elects to
          continue.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - document is in Postscript format
               - here is the document to print

             < ----------------------------------------------------------+
               Print data accepted and printing started
               - job id = #12345

             < --------------------------------------------------------- +
               - Notification: printer jammed, cannot continue

             * Jam is clear by human intervention, printing continues

             +---------------------------------------------------------- >
                Here is the last part of the document to print

             < ----------------------------------------------------------+
                Print job received
               - current job state = printing
               - submission time = 02/12/97, 15:35
               - printer state = printing

                               Expires: Sept 24, 1997
          8.15. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.15.                                SUBMITTING A PRINT JOB WITH SERVER PULL

          An end-user wants to submit a print job. The print data is in a
          file and is publicly available. It is pulled by the Printer. printer. The
          client and Printer printer are behind the same corporate firewall. The
          printer is available to anyone behind the firewall and no
          authentication and authorization is required. The Printer printer is
          capable of spooling the output. Printing may start before the
          entire job has been pulled.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - here is a reference to the data to be printed

             < ----------------------------------------------------------+
               Print data accepted and printing started
               - job id = #12345
               - current state of job = spooled
               - submission time = 02/12/97, 13:15
               - printer state = printing

               .
               .
              < ----------------------------------------------------------+
               Get the file to be printed

              +---------------------------------------------------------- >
               Here it is

               Note: Failure to find the file, would end the transaction
                         with an error at this point and an asynchronous
                         notification would be send to the Client.

              < ----------------------------------------------------------+
                Data received

                               Expires: Sept 24, 1997
          8.16. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.16.                                SUBMITTING A PRINT JOB WITH REFERENCED RESOURCES

          An end-user wants to submit a print job. The  Part of the print data
          is on a file on the user’s user's workstation. It is pushed by the
          client, but
          printing the print job requires some resources resource not included in
          the print file,
          e.g. a high resolution image or a font resource. Printer. file. The client and Printer printer are behind the same
          corporate firewall. The printer is available to anyone behind the
          firewall and no authentication and authorization is required. The Printer
          printer is capable of spooling the output. No errors occur.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Here is a print job
               - job name = MyJob
               - notify me by email when done printing
               - print on iso-a4-white paper
               - print on both sides of the paper
               - return status of the printer in response
               - external resource required - here is URL
               - here is the data to be printed
                   - (with an external data reference)

             < ----------------------------------------------------------+
               Print data job accepted and printing started spooled
               - job id = #12345
               - current state of job = spooled
               - submission time = 02/12/97, 13:15 15:35

             +---------------------------------------------------------- >
               - printer state = printing

               .
               . here is the document to print

             < ----------------------------------------------------------+
               - OK

             +---------------------------------------------------------- >
               - here is the URI to print, it is the last document.

             < ----------------------------------------------------------+
               - OK

              < ----------------------------------------------------------+
                Get the external resource

              +---------------------------------------------------------- >
                Here it is

                               Expires: Sept 24, 1997
          8.17. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.17.                                GETTING CAPABILITIES

          8.17.1.

          9.17.1.                   Submission Attributes

          An end-user wants to get the production and scheduling attributes
          that are supported or required when submitting jobs to this
          Printer.
          printer. The client will use these attributes when forming the
          subsequent print request.

          Client                                        IPP Printer
             +---------------------------------------------------------- >
               I’m
               I'm going to submit a Postscript job
               give me your job submission attributes

             < ----------------------------------------------------------+
               Postscript production attributes for this Printer are:
               - medium-select = us-letter-white, us-legal-white
                  - default is us-letter-white
                  -   copies = 1,2,3,4,5
                  - default is 1
                       - print-quality = draft, normal, high
                  - default is draft
                       - sides = 1-sided, 2-sided-long-edge
                  - default is 2-sided-long-edge
               - Job scheduling attributes for this Printer are:
                    - job-priority = 1,2,3
                  - default = 3

          8.17.2.

          9.17.2.                   Printer Capabilities

          An end-user wants to determine the resolution, marking
          technology, and PDLs supported by the printer.

          Client                                        IPP Printer
             +---------------------------------------------------------- >
               Please tell me the
               - resolution of the printer
               - the marking technology of the printer
               - PDLs supported
             < ----------------------------------------------------------+
               Printer resolution  = 600 dpi
               Marking Technology = laser
               PDLS supported = Postscript level 2, PCL/6

                               Expires: Sept 24, 1997
          8.18. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.18.                                GETTING STATUS

          8.18.1.

          9.18.1.                  Printer State/Status

          An end-user wants to determine the state or status of the
          printer.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               What is the state of the printer?

             < ----------------------------------------------------------+
               Printer state = out-of-paper

          8.18.2.

          9.18.2.                   Job Status

          An end user wants to get the status of a job he has submitted.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Please tell me the status of job #12345

             < ----------------------------------------------------------+
               Job #12345 is queued
               it is number 3 in the queue
               printer state = printing

          8.18.3.

          9.18.3.                   Status of All My Jobs

          An end user wants to get a list of all of the jobs he has
          submitted to this Printer.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
               Please tell me the status of my jobs

                               Expires: Sept 24, 1997

             < ----------------------------------------------------------+

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               Job #00012 is complete
               Printed at 12:35 on 01/23/97

               Job #09876 is printing

               Job #12345 is queued
               it is number 3 in the queue

               Job #34567 is queued
               it is number 7 in the queue

                               Expires: Sept 24, 1997
          8.19. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.19.                                ASYNCHRONOUS NOTIFICATION

          8.19.1.

          9.19.1.                   Job Completion

          An end-user wants to get notification of events that affect his
          print jobs. Print job completes without error.

          Client                                        IPP Printer

             < ----------------------------------------------------------+
               Print job #123 completed

          8.19.2.

          9.19.2.                   Job Complete with Data

          An end-user wants to get notification of events that affect his
          print jobs. Print job completes, users asked for all end of job
          information.

          Client                                        IPP Printer

             < ----------------------------------------------------------+
               Print job #123 completed
               - total pages printed = 15
               - number of copies printed = 3
               - total cost to print = $7.45
               - pick up copies in room H-6, building 005

          8.19.3.

          9.19.3.                   Print Job Fails

          An end-user wants to get notification of events that affect his
          print jobs. Print job fails. Printer is unattended.

          Client                                        IPP Printer

             < ----------------------------------------------------------+
               Print job #123 failed
               - total pages printed = 15
               - number of pages submitted = 25
               - printer-state = jammed

                               Expires: Sept 24, 1997
          8.20. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.20.                                CANCEL A JOB

          The end-user submits a print job and later decides to cancel it.

          Client                                        IPP Printer

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Authentication.

             +---------------------------------------------------------- >
               Cancel job #1234

             < ----------------------------------------------------------+
               Job #1234 Canceled

                               Expires: Sept 24, 1997
          8.21. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.21.                                END TO END SCENARIO - WITHIN AN ENTERPRISE

          An office worker prints on shared departmental printers. All
          printers in the office are public, that is, no authentication or
          authorization is required. Printers are protected from external
          access by a firewall. No billing or accounting is required. Most
          printing is done from desktop applications. A help desk is
          provided for printing problems. Standard operating systems and
          applications are used. Drivers are available, but are installed
          manually by support personnel. This scenario assumes that drivers
          have been installed and that drivers are not IPP aware, that is,
          they cannot communicate across an IPP connection to obtain status
          and capabilities. IPP printers appear in application pull-down
          menus. Printer configuration data is hard wired into the driver.

          Client                                        IPP Printer

          End-user selects print from the application pull down menu. An
          IPP printer is selected from the list of Printers offered

          The driver puts up a dialogue with hard-wired set of options
          for this printer. The end-user makes choices and submits job.

             +---------------------------------------------------------- >
               Here is a print job
               - job-name = memo-to-boss
               - notify me by email when job is complete
               - print on us-letter-white paper
               - print 1 copy
               - print at normal quality
               - print on 1 side
               - give me the state of the printer in response

          The driver generates the print data and passes it to the IPP
          driver a piece at a time as it is generated.

             +---------------------------------------------------------- >
               Here is the print data

             < ----------------------------------------------------------+
               Print data received, file is spooled

                               Expires: Sept 24, 1997
               - printer state = printing

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               - time submitted = 2/12/97, 15:35
               - current job state = spooled

          Client adds this job to list of current jobs. List of jobs and
          state of each is available on a pull-down menu on the client.

          End-user selects job #1234 from list and clicks on it to see its
          status.

             +---------------------------------------------------------- >
               Give me the state of job #1234
               and the state of the Printer

             < ----------------------------------------------------------+
               Job #1234 state = spooled
               - it is number 3 in the queue
               - printer state = printing

          The job completes without error

             < ----------------------------------------------------------+
               Job #1234 completed
               12 of 12 pages printed

                               Expires: Sept 24, 1997
          8.22. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.22.                                END TO END SCENARIO - ACROSS ENTERPRISES

          An office worker in Company A needs to print an office document
          on a ‘               ‘public’                       ’ "public" printer at Company B, a business partner. Both
          companies have corporate firewalls so the print request must flow
          out of A’s A's firewall and into B’s B's firewall. The office worker can
          look at public printers in Company B’s B's directory service. The
          document is generated by a desktop application. Since the printer
          is ‘             ‘public’                     ’ "public" no authentication or authorization is required.  A
          driver is downloaded. The driver is IPP aware, that is, it can
          communicate dynamically through the IPP protocol layer to obtain
          information about the printer.

          Client                      Company B’s B's Directory Service

          End user connects to B’s B's Directory service

             +---------------------------------------------------------- >
               Find a Printer with these characteristics
               - public (no authorization or authentication required)
               - is in Lexington, building 004
               - prints black and white

             < ----------------------------------------------------------+
               Printer ‘                       ‘Public-A’                                 ’ "Public-A"
               - http://www.lexmark.com/pubprinter/a

               Printer ‘                       ‘Public-B’                                 ’ "Public-B"
               - http://www.lexmark.com/pubprinter/b

          End user selects Public-A

          Client                                           Public-A

             +---------------------------------------------------------- >
               I am using OS/2 V4.5, where
               Where can I find a driver for you?

             < ----------------------------------------------------------+
               Drivers at http://www.lexmark.com/pubprinters/a/os245

          End user gets driver and installs it on his PC.

                               Expires: Sept 24, 1997 April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          End-user selects print from the application pull down menu.
          ‘          ‘Public-A’                    ’
          "Public-A" is selected from the list of Printers offered

             +---------------------------------------------------------- >
               I’m
               I'm going to submit a print job
               give me your job submission attributes

             < ----------------------------------------------------------+
               Production attributes for this Printer are:
               - medium-select = us-letter-white, us-legal-white
                  - default is us-letter-white
                  -   copies = 1,2,3,4,5
                  - default is 1
                       - print-quality = draft, normal, high
                  - default is draft
                       - sides = 1-sided, 2-sided-long-edge
                  - default is 2-sided-long-edge

               Job scheduling attributes for this Printer are:
               - job-priority = 1,2,3
                  default = 3

          Driver puts up dialogue with available options and fills in the
          defaults.

          End-user makes choices and submits job

             +---------------------------------------------------------- >
               Here is a print job
               - job-name = memo-to-Don-Wright
               - notify me by email when job is complete
               - print on us-letter-white paper
               - print 1 copy
               - print at normal quality
               - print on 1 side
               - give me the state of the printer in response

          The driver generates the print data and passes it to the IPP
          driver a piece at a time.

             +---------------------------------------------------------- >
               Here is the print data

             < ----------------------------------------------------------+

                               Expires: Sept 24, 1997 April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               Print data received, and spooling started
               print job id = #1234

               Print data received, file is spooled

               - printer state = printing
               - time submitted = 2/12/97, 15:35
               - current job state = spooled

          Client adds this job to list of current jobs.  List of jobs and
          state of each is available on a pull-down menu on the client.

          End-user selects job #1234 from list and clicks on it to see its
          status.

             +---------------------------------------------------------- >
               Give me the state of job #1234
               and the state of the Printer

             < ----------------------------------------------------------+
               Job #1234 state = spooled
               - it is number 3 in the queue
               - printer state = printing

              * The job completes without error
             < ----------------------------------------------------------+
               Job #1234 completed
               12 of 12 pages printed

                               Expires: Sept 24, 1997
          8.23. April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
          9.23.                                END TO END SCENARIO - ON THE INTERNET

          An executive in her hotel room is finishing an important
          presentation on her laptop computer. She connects to a local
          print shop through the web to get a copy of her charts printed
          for tomorrow’s tomorrow's presentation. She must find a print shop that is
          convenient and can print color transparencies. She must download
          and temporarily install a driver in order to generate the PDL
          required by the print shop. Mutual authentication is required by
          the printshop and payment must be made in advance. The job is
          encrypted on the wire to prevent eavesdropping.

          End-user completes presentation. She goes to the web and connects
          to the SirSpeedy home page.

             Client                     SirSpeedy Directory Service
             +---------------------------------------------------------- >

               Find me a printer with these characteristics
               - Near Market Street in San Jose
               - Prints color transparencies
               - drivers can be downloaded
               - supports privacy (encryption)
               - takes my VISA card
               - give me rough cost per page

          Available Printers matching these characteristics are looked up
          in the Directory Service

             < ----------------------------------------------------------+

               Printer ‘                       ‘Color-A’                                ’ "Color-A"
               - located at 123 First Street in San Jose
               - URL URI is http://www.SirSpeedy.com/FirstStreet/Color-A
               - prints color transparencies
               - 600 dpi laser
               - driver ABC-Postscript-V1.3 available at this URL URI
               - cost = $.75 per page
               - authentication required to use printer
               - payment required prior to printing
               - printer’s public key = ‘                                         ‘!@8778961’                                                    ’

               Printer ‘                       ‘Color-B’                                ’

                               Expires: Sept 24, 1997

               Printer "Color-B"
               - located at 67 San Carlos Street, San Jose
               - URL URI is http://www.SirSpeedy.com/SanCarlos/Color-B

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
               - prints color transparencies
               - 1200 dpi laser
               - driver XYZ-Poscscript-V4.3 available at this URL URI
               - cost = $1.25 per page
               - authentication required to use printer
               - payment required prior to printing
               - printer’s public key = ‘                                         ‘!@#$%78961’                                                     ’
               - more information at this URL URI

          The user decides to use the first printer because it is closer.
          She connects to the URL URI given to get a driver.

          Client                                         Driver URL URI

             +---------------------------------------------------------- >
               I need a driver for ‘                                   ‘Color-A’                                            ’
               I am using Windows 95 "Color-A"

             < ----------------------------------------------------------+
                Driver installation files installer is at http://www.xerox.com/prtdrvrs

               Driver is installed

               User connects to
               ‘               ‘Color-A’                        ’
               "Color-A"

          Client                              IPP Printer ‘                                                         ‘Color-A’                                                                  ’ "Color-A"

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Mutual authentication and exchange of secret keys

             +---------------------------------------------------------- >
               I’m
               I'm going to submit a print job
               give me your job submission attributes

             < ----------------------------------------------------------+
               Production attributes for this Printer are:
               - medium-select = us-letter-white, us-legal-white
                    - default is us-letter-white
               - copies = 1,2,3,4,5
                    - default is 1
               - print-quality = draft, normal, high

                               Expires: Sept 24, 1997
                    - default is draft
               - sides = 1-sided, 2-sided-long-edge

                               Expires: April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.
                    - default is 2-sided-long-edge

               Job scheduling attributes for this Printer are:
               - job-priority = 1,2,3
                  default = 3

          Driver puts up dialogue with available options and fills in the
          defaults.

          End-user makes choices and submits job

             +---------------------------------------------------------- >
                Here is a print job
               - job-name = presentation
               - notify me by email when job is complete
               - print on us-letter-transparency
               - print 1 copy
               - print at high quality
               - print by 9:00 am tomorrow morning
               - give me the state of the printer in response

          The driver generates the print data and passes it to the IPP
          driver a piece at a time.

             +---------------------------------------------------------- >
              Here is the print data

              < ---------------------------------------------------------+
              Print data received, and spooling started
              print job id = #1234

              Print data received, file is spooled
               - printer state = printing
               - time submitted = 2/12/97, 15:35
               - current job state = held, waiting for payment

             +---------------------------------------------------------- >
             < ----------------------------------------------------------+
               Payment transaction

             < ----------------------------------------------------------+
               Job is scheduled to print, pick up after 9:00am tomorrow
               Thank you for using SirSpeedy

                               Expires: Sept 24, 1997 April 15, 1998
             Copyright(C) The Internet Society 1997. All Rights Reserved.