draft-ietf-ipp-req-01.txt   draft-ietf-ipp-req-02.txt 
INTERNET DRAFT F.D. Wright, Lexmark International INTERNET DRAFT F.D. Wright, Lexmark International
<draft-ietf-ipp-req-01.txt> <draft-ietf-ipp-req-02.txt>
October 15, 1997 Expires: April 15, 1998 June 30, 1997 Expires: Dec 30, 1998
Requirements for an Internet Printing Protocol Design Goals for an Internet Printing Protocol
STATUS OF THIS MEMO STATUS OF THIS MEMO
This document is an Internet-Draft. Internet-Drafts are working This document is an Internet-Draft. Internet-Drafts are working
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ABSTRACT Abstract
This document is one of a set of documents which together This document is one of a set of documents, which together
describe all aspects of a new Internet Printing Protocol (IPP). describe all aspects of a new Internet Printing Protocol (IPP).
IPP is an application level protocol that can be used for IPP is an application level protocol that can be used for
distributed printing on the Internet. The protocol is heavily distributed printing using Internet tools and technologies. The
influenced by the printing model introduced in the Document protocol is heavily influenced by the printing model introduced
Printing Application (ISO/IEC 10175 DPA) standard. Although DPA in the Document Printing Application (DPA) [ISO10175] standard.
identifies the both end user and administrative features, IPP is Although DPA specifies both end user and administrative features,
initially focused only on the end user functionality. IPP version 1.0 (IPP/1.0) focuses only on end user functionality.
The full set of IPP documents include: The full set of IPP documents includes:
Requirements for an Internet Printing Protocol Design Goals for an Internet Printing Protocol (this document)
Internet Printing Protocol/1.0: Model and Semantics (informational)
Internet Printing Protocol/1.0: Protocol Specification
Rationale for the Structure and Model and Protocol for the Rationale for the Structure and Model and Protocol for the
Internet Printing Protocol Internet Printing Protocol [IPP-RAT] (informational)
Internet Printing Protocol/1.0: Model and Semantics [IPP MOD]
Internet Printing Protocol/1.0: Encoding and Transport [IPP-PRO]
Mapping between LPD and IPP Protocols [IPP LPD] (informational)
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This document describes the requirements for an Internet printing
protocol. It describes the end-user, operator and administrator The design goals document, "Design Goals for an Internet Printing
wants and needs in the context of printing documents from a Protocol", takes a broad look at distributed printing
variety of sources. These sources include standard desktop functionality, and it enumerates real-life scenarios that help to
applications (e.g. word processors, spreadsheets, and browsers), clarify the features that need to be included in a printing
documents selected by reference (e.g. URI) and documents created protocol for the Internet. It identifies requirements for three
by batch or background applications. Additionally, requirements types of users: end users, operators, and administrators. The
for light-weight printer status and management and job status and design goals document calls out a subset of end user requirements
management services will be discussed. that are satisfied in IPP/1.0. Operator and administrator
requirements are out of scope for version 1.0. The rationale
document, "Rationale for the Structure and Model and Protocol for
the Internet Printing Protocol", describes IPP from a high level
view, defines a roadmap for the various documents that form the
suite of IPP specifications, and gives background and rationale
for the IETF working group's major decisions. The document,
"Internet Printing Protocol/1.0: Model and Semantics", describes
simplified model with abstract objects, their attributes, and
their operations. The model introduces a Printer and a Job. The
Job supports multiple documents per Job. The model document also
addresses how security, internationalization, and directory
issues are addressed. The protocol specification, "Internet
Printing Protocol/1.0: Encoding and Transport", is a formal
mapping of the abstract operations and attributes defined in the
model document onto HTTP/1.1. The protocol specification defines
the encoding rules for a new Internet media type called
"application/ipp". The "Mapping between LPD and IPP Protocols"
gives some advice to implementers of gateways between IPP and LPD
(Line Printer Daemon) implementations.
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TABLE OF CONTENTS TABLE OF CONTENTS
1. TERMINOLOGY..................................................5 1. TERMINOLOGY.................................................5
2. REQUIREMENTS.................................................7 2. DESIGN GOALS................................................7
2.1. END-USER .................................................7 2.1. End-user ................................................7
2.1.1. Finding or locating a printer. .......................7 2.1.1. Finding or locating a printer. ......................7
2.1.2. Create an instance of the printer. ...................8 2.1.2. Create an instance of the printer. ..................8
2.1.3. Viewing the status and capabilities of a printer. ....8 2.1.3. Viewing the status and capabilities of a printer. ...8
2.1.4. Submitting a print job. ..............................9 2.1.4. Submitting a print job. .............................9
2.1.5. Viewing the status of a submitted print job. ........10 2.1.5. Viewing the status of a submitted print job. .......10
2.1.6. Canceling a Print Job ...............................10 2.1.6. Canceling a Print Job ..............................10
2.2. OPERATOR ................................................11 2.2. Operator (NOT REQUIRED FOR V1.0) .......................10
2.2.1. Alerting. ...........................................11 2.2.1. Alerting. ..........................................11
2.2.2. Changing Print and Job Status. ......................11 2.2.2. Changing Print and Job Status. .....................11
2.3. ADMINISTRATOR ...........................................11 2.3. Administrator (NOT REQUIRED FOR v1.0) ..................11
3. IPP SCENARIOS...............................................16 3. OBJECTIVES OF THE PROTOCOL.................................13
3.1. PRINTER DISCOVERY .......................................17 3.1. SECURITY CONSIDERATIONS ................................13
3.2. DRIVER INSTALLATION .....................................18 3.2. Interaction with LPD (RFC1179) .........................14
3.3. SUBMITTING A PRINT JOB ..................................18 3.3. Extensibility ..........................................15
3.4. GETTING STATUS/CAPABILITIES .............................19 3.4. Firewalls ..............................................15
3.5. ASYNCHRONOUS NOTIFICATION ...............................20 3.5. Internationalization ...................................15
3.6. JOB CANCELING ...........................................20 4. IPP SCENARIOS..............................................17
4. OBJECTIVES OF THE PROTOCOL..................................13 4.1. Printer Discovery ......................................18
4.1. SECURITY ................................................13 4.2. Driver Installation ....................................19
4.2. INTERACTION WITH LPD (RFC1179) ..........................14 4.3. Submitting a Print Job .................................19
4.3. EXTENSIBILITY ...........................................14 4.4. Getting Status/Capabilities ............................20
4.4. FIREWALLS ...............................................15 4.5. Asynchronous Notification ..............................21
4.5. INTERNATIONALIZATION ....................................15 4.6. Job Canceling ..........................................21
5. REFERENCES..................................................22 5. COPYRIGHT..................................................23
6. ACKNOWLEDGMENTS.............................................23 6. REFERENCES.................................................24
7. AUTHOR'S ADDRESS............................................23 7. ACKNOWLEDGMENTS............................................25
8. APPENDIX - DETAILED SCENARIOS...............................24 8. AUTHOR'S ADDRESS...........................................25
8.1. PRINTER DISCOVERY WITHIN AN ENTERPRISE ..................24 9. APPENDIX - DETAILED SCENARIOS..............................26
8.2. PRINTER DISCOVERY ACROSS ENTERPRISES ....................26 9.1. Printer discovery within an enterprise .................26
8.3. PRINTER DISCOVERY ON THE INTERNET -LOGICAL OPERATIONS ...27 9.2. Printer discovery across enterprises ...................28
8.4. PRINTER DISCOVERY ON THE INTERNET - AUTHENTICATION ......28 9.3. Printer discovery on the Internet -logical operations ..29
8.5. DRIVER DOWNLOAD .........................................30 9.4. Printer discovery on the Internet - authentication .....30
8.6. SUBMITTING A PRINT JOB AS A FILE ........................31 9.5. Driver Download ........................................32
8.7. SUBMITTING A PRINT JOB WITH TWO DOCUMENTS ...............32 9.6. Submitting a print job as a file .......................33
8.8. SUBMITTING A PRINT JOB AS A FILE, PRINTING FAILS ........33 9.7. Submitting a print job with two documents ..............34
8.9. SUBMITTING A PRINT JOB WITH AUTHENTICATION, PRIVACY AND 9.8. Submitting a print job as a file, printing fails .......35
PAYMENT ......................................................34 9.9. Submitting a print job with authentication, PRIVACY and
8.10. SUBMITTING A PRINT JOB WITH DECRYPTION ERROR ...........35 payment .....................................................35
8.11. SUBMITTING A PRINT JOB WITH AUTHENTICATION .............37 9.10. Submitting a print job with decryption error ..........37
8.12. SUBMITTING A PRINT JOB GENERATED DYNAMICALLY ...........38 9.11. Submitting a print job with authentication ............39
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8.13. SUBMITTING A PRINT JOB WITH A PRINTER JAM - CANCELED ...39
8.14. SUBMITTING A PRINT JOB WITH A PRINTER JAM - RECOVERED ..40 9.12. Submitting a print job generated dynamically ..........40
8.15. SUBMITTING A PRINT JOB WITH SERVER PULL ................41 9.13. Submitting a print job with a Printer jam - CANCELED ..41
8.16. SUBMITTING A PRINT JOB WITH REFERENCED RESOURCES .......42 9.14. Submitting a print job with a Printer jam - recovered .42
8.17. GETTING CAPABILITIES ...................................43 9.15. Submitting a print job with server pull ...............43
8.17.1. Submission Attributes ..............................43 9.16. Submitting a print job with referenced resources ......44
8.17.2. Printer Capabilities ...............................43 9.17. Getting Capabilities ..................................45
8.18. GETTING STATUS .........................................44 9.17.1. Submission Attributes .............................45
8.18.1. Printer State/Status ...............................44 9.17.2. Printer Capabilities ..............................45
8.18.2. Job Status .........................................44 9.18. Getting Status ........................................46
8.18.3. Status of All My Jobs ..............................44 9.18.1. Printer State/Status ..............................46
8.19. ASYNCHRONOUS NOTIFICATION ..............................46 9.18.2. Job Status ........................................46
8.19.1. Job Completion .....................................46 9.18.3. Status of All My Jobs .............................46
8.19.2. Job Complete with Data .............................46 9.19. Asynchronous Notification .............................48
8.19.3. Print Job Fails ....................................46 9.19.1. Job Completion ....................................48
8.20. CANCEL A JOB ...........................................47 9.19.2. Job Complete with Data ............................48
8.21. END TO END SCENARIO - WITHIN AN ENTERPRISE .............48 9.19.3. Print Job Fails ...................................48
8.22. END TO END SCENARIO - ACROSS ENTERPRISES ...............50 9.20. Cancel a job ..........................................49
8.23. END TO END SCENARIO - ON THE INTERNET ..................53 9.21. End to end Scenario - within an enterprise ............50
9.22. End to end Scenario - across enterprises ..............52
9.23. End to End Scenario - on the internet .................55
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1. TERMINOLOGY 1. TERMINOLOGY
Internet Printing for the purposes of this document is the Internet Printing for the purposes of this document is the
application of Internet tools, programs, servers and networks to application of Internet tools, programs, servers and networks to
allow end-users to print to a remote printer using, after initial allow end-users to print to a remote printer using, after initial
setup or configuration, the same methods, operations and setup or configuration, the same methods, operations and
paradigms as would be used for a locally attached or a local area paradigms as would be used for a locally attached or a local area
network attached printer. This could include the use of HTTP network attached printer. This could include the use of HTTP
servers and browsers and other applications for providing static, servers and browsers and other applications for providing static,
dynamic and interactive printer locating services, user dynamic and interactive printer locating services, user
installation, selection, configuration, print job submission, installation, selection, configuration, print job submission,
printer capability inquiry and status inquiry of remote printers printer capability inquiry and status inquiry of remote printers
and jobs. and jobs.
For the purposes of this document, a WEB Browser is software For the purposes of this document, a WEB Browser is software
available from a number of sources including but not limited to available from a number of sources including but not limited to
the following: Microsoft Internet Explorer, NCSA Mosaic, Netscape the following: Microsoft Internet Explorer, NCSA Mosaic, Netscape
Navigator, Sun Hot Java!. The major task of these products is to Navigator, Sun Hot Java!. The major task of these products is to
use the Hypertext Transport Protocol (HTTP) to retrieve, use the Hypertext Transport Protocol (HTTP) to retrieve,
interpret and display Hypertext Markup Language (HTML). These interpret and display Hypertext Markup Language (HTML). These
products are a part of a complete Internet Printing system but products are often a part of a complete Internet Printing system
may not be present in all implementations. because they are often used as a means of obtaining the status of
or more information about the printing system; however, they may
not be present in all implementations.
Throughout this document, 'printer' shall be interpreted to Throughout this document, 'printer' shall be interpreted to
include any device which is capable of marking on a piece of include any device which is capable of marking on a piece of
media using any available technology. No requirement is made media using any available technology. These design goals do not
for multi-tiered printing solutions involving servers (single or include support for multi-tiered printing solutions involving
multiple) logically in front of the actual printing device yet servers (single or multiple) logically in front of the actual
all such configurations shall be supported but shall appear to printing device yet all such configurations shall be supported
the end-user as only a single device. but shall appear to the end-user as only a single device.
Throughout this document 'driver' refers to the code installed in
some client operating system to generate the print data stream
for the intended printer. Some computing environments may not
include a separate printer driver. Rather, the generation of the
proper print data stream is accomplished in an application on
that computer. How such a computer environment or application is
updated to support a new printer now made available using IPP is
outside the scope of IPP. The actual details for installing a
printer driver are operating system dependent and are also
outside the scope of IPP. See also section 3.1 (SECURITY
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CONSIDERATIONS) for security implications of driver download and
installation.
The IPP protocol will support the following physical The IPP protocol will support the following physical
configurations: configurations:
- An IPP client talking to an IPP Printer object imbedded in a - An IPP client talking to an IPP Printer object imbedded in a
single, physical output device. single, physical output device.
- An IPP Client talking to a server containing one or more IPP - An IPP Client talking to a server containing one or more IPP
Printer objects. Each Printer object is associated with Printer objects. Each Printer object is associated with
exactly one physical output device supported by the server. exactly one physical output device supported by the server.
The protocol between the server and the output devices is The protocol between the server and the output devices is
undefined. undefined.
- An IPP Client talking to an IPP Printer object in a server. - An IPP Client talking to an IPP Printer object in a server.
The Printer object is associated with one or more physical The Printer object is associated with one or more physical
output devices, but the client only sees the Printer object, output devices, but the client only sees the Printer object,
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which is an abstraction and represents all of the associated which is an abstraction and represents all of the associated
physical output devices. The protocol between the server and physical output devices. The protocol between the server and
the physical output devices is undefined. the physical output devices is undefined.
Throughout this document, certain requirements will be identified Throughout this document, certain design goals will be identified
as not being a part of version 1.0 (or V1.0) of the protocol or as not being a part of version 1.0 (or V1.0) of the protocol or
as being satisfied by means outside of IPP. IPP is assumed to be as being satisfied by means outside of IPP. IPP is assumed to be
one part, an enabler, of a complete Internet Printing solution. one part, an enabler, of a complete Internet Printing solution.
For example printer instance creation is not performed by but is For example printer instance creation is not performed by but is
enabled by the protocol. Globally, none of the operator or enabled by the protocol. Globally, none of the operator or
administrators requirements will be included in version 1.0. administrators wants and needs are included in the design goals
Some of the end-user requirements may also be excluded from for version 1.0. Some of the end-user wants and needs may also
version 1.0 and will be so noted in the description of that be excluded from version 1.0 and will be so noted in the
requirement. Subsequent versions of the protocol (e.g. V2.0) may description of them. Subsequent versions of the protocol (e.g.
include support for these initially excluded requirements. V2.0) may include support for these initially excluded wants and
needs.
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2. REQUIREMENTS
The next three sections identify the requirements of an Internet 2. DESIGN GOALS
The next three sections identify the design goals for an Internet
printing protocol from three roles assumed by humans: end-user, printing protocol from three roles assumed by humans: end-user,
operator, and administrator. The requirements defined here are operator, and administrator. The goals defined here are only
only those that need to be addressed by an Internet printing those that need to be addressed by an Internet printing protocol.
protocol. Other requirements, such as that the operator needs Other wants and needs, such as that the operator needs physical
physical access to the printer (e.g. to be able to load paper or access to the printer (e.g. to be able to load paper or clear
clear jams) are not covered by this document. Section 4 contains jams) are not covered by this document. Section 4 contains
scenarios which provide more detailed examples of the entire scenarios which provide more detailed examples of the entire
process including discovery, status, printing and end-of-job process including discovery, status, printing and end-of-job
reporting. reporting.
2.1. END-USER 2.1. END-USER
An end-user of a printer accepting jobs through the Internet is 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 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. that will submit a job to be printed on the printer.
The requirements of the end-user are broken down into six The wants and needs of the end-user are broken down into six
categories: finding/locating a printer, creating a local instance categories: finding/locating a printer, creating a local instance
of a printer, viewing printer status, viewing printer of a printer, viewing printer status, viewing printer
capabilities, submitting a print job, viewing print job status, capabilities, submitting a print job, viewing print job status,
altering the attributes of a print job. altering the attributes of a print job.
2.1.1. Finding or locating a printer. 2.1.1. Finding or locating a printer.
End-users want to be able to find and locate printers to which 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 they are authorized to print. They want to be able to perform
this function using a standard WEB browser or other application. this function using a standard WEB browser or other application.
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- by geographic location (bldg 1, Kentucky, etc.) - by geographic location (bldg 1, Kentucky, etc.)
- by capability or attribute (color, duplex, legal paper, etc.) - by capability or attribute (color, duplex, legal paper, etc.)
Additionally, while it is outside of scope of IPP, end-users want Additionally, while it is outside of scope of IPP, end-users want
to be able to limit the scope of their searching to: to be able to limit the scope of their searching to:
- inside a functional sub-domain - inside a functional sub-domain
- include only a particular domain (lexmark.com) - include only a particular domain (lexmark.com)
- exclude specified domains - exclude specified domains
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While an Internet printing protocol may not of itself include While an Internet printing protocol may not of itself include
this function, IPP must define and enable a directory schema this function, IPP must define and enable a directory schema
which will provide the necessary information for a directory which will provide the necessary information for a directory
service implementation to consistently represent printers by service implementation to consistently represent printers by
their IPP attributes. their IPP attributes.
2.1.2. Create an instance of the printer. 2.1.2. Create an instance of the printer.
After finding the desired printer, an end-user needs to be able After finding the desired printer, an end-user needs to be able
to create a local instance of that printer within the end-user to create a local instance of that printer within the end-user
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also the necessary icons and registry entries to be created and also the necessary icons and registry entries to be created and
initialized. Where required, drivers may need to be downloaded initialized. Where required, drivers may need to be downloaded
from some repository and installed on the computer. All from some repository and installed on the computer. All
necessary decompressing, unpacking, and other installation necessary decompressing, unpacking, and other installation
actions should occur without end-user interaction or intervention actions should occur without end-user interaction or intervention
excepting initial approval by the end-user. Once the local excepting initial approval by the end-user. Once the local
instance of the printer has been installed, it shall appear to instance of the printer has been installed, it shall appear to
the end-user of operating system and to the applications running the end-user of operating system and to the applications running
there as any other printer (local, local area network connected, there as any other printer (local, local area network connected,
or network operating system connected) on the end-user desktop or or network operating system connected) on the end-user desktop or
environment. An IPP's role in this requirement is simply to environment. An IPP's role in this goal is simply to enable the
enable the creation of the printer instance providing creation of the printer instance providing information such as
information such as where to locate a printer driver for this where to locate a printer driver for this printer, as an
printer, as an attribute of an IPP Printer. attribute of an IPP Printer.
2.1.3. Viewing the status and capabilities of a 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- Before using a selected printer or, in fact at any time, the end-
user needs the ability to verify the characteristics and status user needs the ability to verify the characteristics and status
of both printers and jobs queued for that printer. When checking of both printers and jobs queued for that printer. When checking
the characteristics of a printer, the end-user typically wants to the characteristics of a printer, the end-user typically wants to
be able to determine the capability of the device, e.g.: be able to determine the capability of the device, e.g.:
- supported media, commonly paper, by size and type - supported media, commonly paper, by size and type
- paper handling capability, e.g. duplex, collating, finishing - paper handling capability, e.g. duplex, collating, finishing
- color capability - color capability
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When checking the status of the printer and its print jobs, the When checking the status of the printer and its print jobs, the
end-user typically wants to be able to determine: end-user typically wants to be able to determine:
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- is the printer on-line? - is the printer on-line?
- what are the defaults to be used for printing? - what are the defaults to be used for printing?
- how many jobs are queued for the printer? - how many jobs are queued for the printer?
- how are job priorities assigned? (outside the scope of IPP) - how are job priorities assigned? (outside the scope of IPP)
2.1.4. Submitting a print job. 2.1.4. Submitting a print job.
Once the desired printer has been located and installed, the end- Once the desired printer has been located and installed, the end-
user wants to print to that printer from normal applications user wants to print to that printer from normal applications
using standard methods. These normal applications include such using standard methods. These normal applications include such
programs as word processors, spreadsheets, data-base programs as word processors, spreadsheets, data-base
applications, WEB browsers, production printing applications, applications, WEB browsers, production printing applications,
etc. Additionaly, the end-user may want to print a file already etc. Additionaly, the end-user may want to print a file already
existing on the end-user's computer -- "simple push." In existing on the end-user's computer -- "simple push." In
addition to printing from an application and simple push, the addition to printing from an application and simple push, the
end-user needs to have the ability to submit a print job by end-user needs to have the ability to submit a print job by
reference. Printing by reference is defined to mean as reference. Printing by reference is defined to mean as
submitting a job by providing a reference to an existing submitting a job by providing a reference to an existing
document. The reference, a URI, will be resolved before the document. The reference, a URI, will be resolved before the
actual print process occurs. actual print process occurs. Submitting a job by reference
relieves the user from downloading the job from the remote server
and then sending it via IPP to the printer. This saves both time
and network bandwidth.
Some means shall be provided to determine if the format of a job 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 matches the capability of the printer. This can be done by one
of the following (all of which are outside of scope of the IPP of the following (all of which are outside of scope of the IPP
protocol): protocol):
- the end-user selects the correct printer driver - the end-user selects the correct printer driver
- the printer automatically selects the proper interpreter - the printer automatically selects the proper interpreter
- the end-user uses some other manual procedure. - the end-user uses some other manual procedure.
A standard action shall be defined should the job's requirements A standard action shall be defined should the job's requirements
not match the capabilities of the printer. not match the capabilities of the printer.
Because the end-user does not want to know the details of the Because the end-user does not want to know the details of the
underlying printing process, the protocol must support job-to- underlying printing process, the protocol must support job-to-
printer capability matching (all implementations are not printer capability matching (all implementations are not
necessarily required to implement this function.) This matching necessarily required to implement this function.) This matching
capability requires knowing both the printer's capabilities and capability requires knowing both the printer's capabilities and
attributes and those capabilities and attributes required by the attributes and those capabilities and attributes required by the
job. Actions taken when a print job requires capabilities or 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 attributes that are not available on the printer vary and can
include but are not limited to: include but are not limited to:
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- rejecting the print job - rejecting the print job
- redirecting the print job to another printer (Not in V1.0) - redirecting the print job to another printer (Not in V1.0)
- printing the job, accepting differences in the appearance - printing the job, accepting differences in the appearance
Print jobs will also be submitted by background or batch Print jobs will also be submitted by background or batch
applications without human intervention. applications without human intervention.
End-users need the ability to set certain print job parameters at End-users need the ability to set certain print job parameters at
the time the job is submitted. These parameters include but are the time the job is submitted. These parameters include but are
not limited to: not limited to:
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required. Notification means are not defined by the protocol but required. Notification means are not defined by the protocol but
the protocol must provide a means of enabling and disabling the the protocol must provide a means of enabling and disabling the
notification. notification.
2.1.6. Canceling a Print Job 2.1.6. Canceling a Print Job
While a job is waiting to be printing or has been started but not While a job is waiting to be printing or has been started but not
yet completed, the original creator/submitter of the print job yet completed, the original creator/submitter of the print job
(i.e. the end-user) shall be able to cancel the job entirely (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.) is waiting) or the remaining portion of it (job is printing.)
Altering the print job itself is not a V1.0 requirement. Altering the print job itself is not a V1.0 design goal.
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
2.2. OPERATOR (NOT REQUIRED FOR V1.0) 2.2. OPERATOR (NOT REQUIRED FOR V1.0)
An operator of a printer accepting jobs through the Internet is An operator of a printer accepting jobs through the Internet is
one of the roles in which humans act. The operator has the one of the roles in which humans act. The operator has the
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
responsibility of monitoring the status of the printer as well as responsibility of monitoring the status of the printer as well as
managing and controlling the jobs at the device. These managing and controlling the jobs at the device. These
responsibilities include but are not limited to the replenishing responsibilities include but are not limited to the replenishing
of supplies (ink, toner, paper, etc.), the clearing of minor of supplies (ink, toner, paper, etc.), the clearing of minor
errors (paper jams, etc.) and the re-prioritization of end-user errors (paper jams, etc.) and the re-prioritization of end-user
jobs. Operator requirements will not be addressed by V1.0 of the jobs. Operator wants and needs will not be addressed by V1.0 of
protocol. the protocol.
The requirements of the operator include all those of the end- The wants and needs of the operator include all those of the end-
user but may include additional privileges. For example, an user but may include additional privileges. For example, an
operator may be able to view all print jobs on a printer while operator may be able to view all print jobs on a printer while
the end-user may only see his own jobs. the end-user may only be able to see his own jobs.
2.2.1. Alerting. 2.2.1. Alerting.
One of the required operator functions is having the ability to One of the required operator functions is having the ability to
discover or to be alerted to changes in the status of a printer discover or to be alerted to changes in the status of a printer
particularly those changes that cause a printer to stop printing particularly those changes that cause a printer to stop printing
and to be able to correct those problems. As such, an Internet and to be able to correct those problems. As such, an Internet
printing protocol shall be able to alert a designated operator or printing protocol shall be able to alert a designated operator or
operators to these conditions such as 'out of paper', 'out of operators to these conditions such as 'out of paper', 'out of
ink', etc. Additionally. the operator shall be able to, ink', etc. Additionally. the operator shall be able to,
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affect changes to printer and job status remotely. For example, affect changes to printer and job status remotely. For example,
the operator will need to be able to re-prioritize or cancel any the operator will need to be able to re-prioritize or cancel any
print jobs on a printer to which the operator has authority. print jobs on a printer to which the operator has authority.
2.3. ADMINISTRATOR (NOT REQUIRED FOR V1.0) 2.3. ADMINISTRATOR (NOT REQUIRED FOR V1.0)
An administrator of a printer accepting jobs through the Internet An administrator of a printer accepting jobs through the Internet
is one of the roles in which humans act. The administrator has is one of the roles in which humans act. The administrator has
the responsibility of creating the printer instances and the responsibility of creating the printer instances and
controlling the authorization of other end-users and operators. controlling the authorization of other end-users and operators.
Administrator wants and needs will not be addressed by V1.0 of
the protocol.
Expires: April 15, 1998 The wants and needs of the administrator include all those of the
Copyright(C) The Internet Society 1997. All Rights Reserved.
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 end-user and, in some environments, some or all of those of the
operator. Minimally, the administrator must also have the tools, operator. Minimally, the administrator must also have the tools,
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programs, utilities and supporting protocols available to be able programs, utilities and supporting protocols available to be able
to: to:
- create an instance of a printer - create an instance of a printer
- create, edit and maintain the list of authorized end-users - 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 operators
- create, edit and maintain the list of authorized - create, edit and maintain the list of authorized
administrators administrators
- create, customize, change or otherwise alter the manner in - create, customize, change or otherwise alter the manner in
which the status capabilities and other information about which the status capabilities and other information about
printers and jobs are presented printers and jobs are presented
- create, customize, or change other printer or job features - create, customize, or change other printer or job features
- administrate billing or other charge-back mechanisms - administrate billing or other charge-back mechanisms
- create sets of defaults - create sets of defaults
- create sets of capabilities - create sets of capabilities
The administrator must have the capability to perform all the The administrator must have the capability to perform all the
above tasks locally or remotely to the printer. above tasks locally or remotely to the printer.
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3. OBJECTIVES OF THE PROTOCOL 3. OBJECTIVES OF THE PROTOCOL
The protocol to be defined by an Internet printing working group The protocol to be defined by an Internet printing working group
will address the requirements of the end-user (V1.0). It will will address the wants and needs of the end-user (V1.0). It will
not, at least initially, address the operator or administrator not, at least initially, address the operator or administrator
requirements (V2.0). wants and needs (V2.0).
The protocol defined shall be independent of the operating system The protocol defined shall be independent of the operating system
of both the client and the server. Generally, any platform of both the client and the server. Generally, any platform
capable of supporting a WEB Browser should be capable of being a capable of supporting a WEB Browser should be capable of being a
client. Generally, any platform providing a WEB/HTTP server and client. Generally, any platform providing a WEB/HTTP server and
printing services should be capable of being a server. Usage of printing services should be capable of being a server. Usage of
the WEB Browser and Server is not required for IPP; the operating the WEB Browser and Server is not required for IPP; the operating
system, operating system extensions or other applications may system, operating system extensions or other applications may
provide IPP functionality directly. provide IPP functionality directly.
In many environments such as Windows 95, Windows NT and OS/2, the In many environments such as Windows 95, Windows NT and OS/2, the
print data is created and transmitted to the printer on the fly print data is created and transmitted to the printer on the fly
rather than being created, spooled and then transmitted to the rather than being created, spooled and then transmitted to the
printer (a typical UNIX method.) The Internet Printing Protocol printer (a typical UNIX method.) The Internet Printing Protocol
must properly handle this methodology and make this transparent must properly handle either methodology and make this transparent
to the end-user. to the end-user.
3.1. SECURITY 3.1. SECURITY CONSIDERATIONS
It is required that the Internet Printing Protocol be able to It is required that the Internet Printing Protocol be able to
operate within a secure environment. Wherever possible, IPP ought operate within a secure environment. Wherever reasonable, IPP
to make use of existing security protocols and services. IPP will ought to make use of existing security protocols and services.
not invent new security features when the requirements described IPP will not invent new security features when the design goals
in this document can be met by existing protocols and services. described in this document can be met by existing protocols and
Examples of such services include Transport Layer Security (TLS) services. Examples of such services include Transport Layer
and HTTP Digest Authentication. Security (TLS) and HTTP Digest Authentication.
Since we cannot anticipate the security levels or the specific Since we cannot anticipate the security levels or the specific
threats that any given IPP print administrator may be concerned threats that any given IPP print administrator may be concerned
with, IPP must be capable of operating with different security with, IPP must be capable of operating with different security
mechanisms and policies as required by the individual mechanisms and policies as required by the individual
installation. The initial security needs of IPP are derived from installation. The initial security needs of IPP are derived from
two primary considerations. First, the printing environments two primary considerations. First, the printing environments
describes in this document take into account that the client, the described in this document take into account that the client, the
Printer, and the document to be printed may all exist in Printer, and the document to be printed may each exist in
different security domains. When objects are in different different security domains. When objects are in different
security domains the requirements for authentication and message security domains the design goals for authentication and message
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protection are much stronger than when they are all in the same
domain. protection may be much stronger than when they are all in the
same domain.
Secondly, the sensitivity and value of the content being printed Secondly, the sensitivity and value of the content being printed
will vary from one instance of a print job to another. For will vary from one instance of a print job to another. For
example, a publicly available document does not need the same example, a publicly available document does not need the same
level of protection as a payroll document does. Message level of protection as a payroll document does. Message
protection requirements include data origin authentication, protection design goals include data origin authentication,
privacy, integrity, and non-repudiation. privacy, integrity, and non-repudiation.
In many environments (e.g. Windows, OS/2) a printer driver may be
needed to create the proper datastream for printer. This
document discusses downloading such a new driver from a variety
of sources. Downloading and installing any software, including
drivers) on a computer exposes that computer to a number of
security risks including but not limited to:
- defective software
- malicious software (e.g. trojan horses)
- inappropriate software (i.e. software doing something
deemed unreasonable by the user.)
As such, proper security considerations and actions need to be
taken by the user and/or a system administrator to prevent the
compromising of the computer. IPP design goals do not include
addressing the security considerations associated with the
downloading and installing of software (including drivers) on a
computer.
Examples including security considerations can be found in
sections 4 (IPP SCENARIOS) and 9 (APPENDIX - DETAILED SCENARIOS)
later in this document.
3.2. INTERACTION WITH LPD (RFC1179) 3.2. INTERACTION WITH LPD (RFC1179)
Many versions of UNIX and in fact other operating systems provide Many versions of UNIX and in fact other operating systems provide
a means of printing as described in RFC1179 (Line Printer Daemon a means of printing as described in RFC1179 (Line Printer Daemon
Protocol.) This document describes the file formats for the Protocol.) This document describes the file formats for the
control and data files as well as the messages used by the control and data files as well as the messages used by the
protocol. Because of the simplistic approach taken by this protocol. Because of the simplistic approach taken by this
protocol, many manufacturers have include proprietary protocol, many manufacturers have include proprietary
enhancements and extensions to 'lpd.' Because of this divergence enhancements and extensions to 'lpd.' Because of this divergence
and due to other requirements described in this document, there and due to other design goals described in this document, there
is no requirement for backward compatibility or interoperability is no requirement for backward compatibility or interoperability
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with 'lpd'. However, a mapping of LPD functionality and IPP with 'lpd'. However, a mapping of LPD functionality and IPP
functionality shall be provided so as to enable a gateway between functionality shall be provided so as to enable a gateway between
LPD and IPP. LPD and IPP.
3.3. EXTENSIBILITY 3.3. EXTENSIBILITY
The Internet Printing Protocol shall be extensible by several The Internet Printing Protocol shall be extensible by several
means that facilitates interoperability and prevents means that facilitate interoperability and prevent implementation
implementation collisions: collisions:
- by providing a process whereby implementers can submit - by providing a process whereby implementers can submit
proposals for registration of new attributes and new proposals for registration of new attributes and new
enumerated values for existing attributes. enumerated values for existing attributes.
- that require review and approval. The Internet Assigned * that require review and approval. The Internet
Number Authority (IANA) will be the repository for such Assigned Number Authority (IANA) will be the repository
accepted registration proposals after review. for such accepted registration proposals after review.
- that do not require review and approval. IANA will be the * that do not require review and approval. IANA will
repository for such registrations. be the repository for such registrations.
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- by providing syntax in the protocol so that implementers - by providing syntax in the protocol so that implementers
may add private (i.e. unregistered) attributesand may add private (i.e. unregistered) attributesand
enumerated attribute values. enumerated attribute values.
- by providing versioning and negotiation so as to enable - by providing versioning and negotiation so as to enable
future implementations of IPP to interoperate with future implementations of IPP to interoperate with
implementations of version 1.0 of IPP. implementations of version 1.0 of IPP.
3.4. FIREWALLS 3.4. FIREWALLS
As stated in the end-user requirements section, Internet printing As stated in the end-user wants and needs section, Internet
shall by definition support printing from one enterprise to printing shall by definition support printing from one enterprise
another. As such, the Internet printing protocol must be capable to another. As such, the Internet printing protocol must be
of passing through firewalls and/or proxy servers (where enabled capable of passing through firewalls and/or proxy servers (where
by the firewall administrator) preferably without modification to enabled by the firewall administrator) preferably without
the existing firewall technology. modification to the existing firewall technology.
3.5. INTERNATIONALIZATION 3.5. INTERNATIONALIZATION
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Users of Internet printing will come from all over the world. As Users of Internet printing will come from all over the world. As
such, where appropriate, internationalization and localization such, where appropriate, internationalization and localization
will be enabled for the protocol. will be enabled for the protocol.
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4. IPP SCENARIOS 4. IPP SCENARIOS
Each of the scenarios in this section describes a specific IPP Each of the scenarios in this section describes a specific IPP
operation, such as submitting a print job. Section 9.0 contains operation, such as submitting a print job. Section 9.0 contains
several detailed flows for each scenario to provide additional several detailed flows for each scenario to provide additional
detail. The examples should not be considered exhaustive, but detail. The examples should not be considered exhaustive, but
illustrative of the functions and features required in the illustrative of the functions and features required in the
protocol. Flows are intended to be protocol neutral. It is not protocol. Flows are intended to be protocol neutral. It is not
assumed that all of the functions and features described in these assumed that all of the functions and features described in these
scenarios will necessarily be supported directly by IPP or in scenarios will necessarily be supported directly by IPP or in
version 1.0 of IPP. version 1.0 of IPP.
See the IPP Model and Semantics document for details on See the IPP Model and Semantics document for details on
configurations of clients, servers and firewalls. configurations of clients, servers and firewalls.
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4.1. PRINTER DISCOVERY 4.1. PRINTER DISCOVERY
Client Directory Client Directory
Service Service Service Service
+----------------------------------------------------------- > +----------------------------------------------------------- >
give me information on printers with these characteristics give me information on printers with these characteristics
< -----------------------------------------------------------+ < -----------------------------------------------------------+
Information on Printers matching these characteristics Information on Printers matching these characteristics
The objective of printer discovery is to locate printers that The objective of printer discovery is to locate printers that
meet the client's requirements. The Directory Service should meet the client's wants and needs. The Directory Service should
provide enough information for the client to make an initial provide enough information for the client to make an initial
choice. The client may have to connect to each individual Printer choice. The client may have to connect to each individual Printer
offered to get more detail. Not all information available from offered to get more detail. Not all information available from
the Directory Service is obtained using IPP; some information may the Directory Service is obtained using IPP; some information may
be administratively provided. be administratively provided.
The actual protocol used between client and Directory or Name The actual protocol used between client and Directory or Name
Service is considered outside the scope of IPP. Printer Discover Service is considered outside the scope of IPP. Printer Discover
is included in the scenarios to provide requirements for the is included in the scenarios to provide design goals for the
directory schema for IPP Printers and to further define Printer directory schema for IPP Printers and to further define Printer
attributes. attributes.
Characteristics that might be considered when locating a Printer Characteristics that might be considered when locating a Printer
include: include:
- capabilities of the Printer, e.g. PDLs supported - capabilities of the Printer, e.g. PDLs supported
- physical location, e.g. in building 010 - physical location, e.g. in building 010
- driver required and location - driver required and location
- cost per page to print (outside the scope of IPP) - cost per page to print (outside the scope of IPP)
skipping to change at page 18, line 5 skipping to change at page 19, line 5
- whether or not usage requires client authentication - whether or not usage requires client authentication
- whether or not Printer can be authenticated - whether or not Printer can be authenticated
- whether or not payment is required for printing (outside the - whether or not payment is required for printing (outside the
scope of IPP) scope of IPP)
- maximum job size (spool size) (outside the scope of IPP) - maximum job size (spool size) (outside the scope of IPP)
- whether or not Printer support compression (outside the scope - whether or not Printer support compression (outside the scope
of IPP) of IPP)
- whether or not Printer supports encryption - whether or not Printer supports encryption
- administrative limits on this Printer - administrative limits on this Printer
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- maximum number of copies per job - maximum number of copies per job
- maximum number of pages per job - maximum number of pages per job
Responses could additionally include: Responses could additionally include:
- how to get more information - how to get more information
- web page - web page
- telephone number - telephone number
- help desk - help desk
4.2. DRIVER INSTALLATION 4.2. DRIVER INSTALLATION
Client Printer Client Printer
+----------------------------------------------------------- > +----------------------------------------------------------- >
Where can I find a driver & software to install it? Where can I find a driver & software to install it?
< -----------------------------------------------------------+ < -----------------------------------------------------------+
URIs for drivers and install software URIs for drivers and install software
Driver here refers to the code installed in the client operating Driver here refers to the code installed in some client operating
system to generate the print data stream for the intended system to generate the print data stream for the intended
printer. The actual details for installing a printer driver are printer. The actual details for installing a printer driver are
operating system independent and are beyond the scope of IPP. operating system dependent and are also outside the scope of IPP.
However, an IPP printer or a directory service advertising an IPP However, an IPP printer or a directory service advertising an IPP
Printer should be capable of telling a client what drivers are Printer should be capable of telling a client what drivers are
required, where they can be found, and provide pointers to available and /or required, where they can be found, and provide
installation instructions, installation code or initialization pointers to installation instructions, installation code or
strings required to install the driver. initialization strings required to install the driver. See
section 3.1 (SECURITY CONSIDERATIONS) for security implications
of driver download and installation.
4.3. SUBMITTING A PRINT JOB 4.3. SUBMITTING A PRINT JOB
Client IPP Printer Client IPP Printer
+----------------------------------------------------------- > +----------------------------------------------------------- >
Here is a Print Job Here is a Print Job
- Job attributes - Job attributes
- Print data - Print data
< -----------------------------------------------------------+ Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
Expires: April 15, 1998 < -----------------------------------------------------------+
Copyright(C) The Internet Society 1997. All Rights Reserved.
Response Response
The protocol must support these sources of client data: The protocol must support these sources of client data:
- Print data is a file submitted with the job - Print data is a file submitted with the job
- Print data is generated on the fly by an application - Print data is generated on the fly by an application
- Print data is a file referenced by a URI - Print data is a file referenced by a URI
The protocol must handle overrun conditions in the printer and The protocol must handle overrun conditions in the printer and
must support overlapped printing and downloading of the file in must support overlapped printing and downloading of the file in
skipping to change at page 19, line 47 skipping to change at page 21, line 5
Client IPP Printer Client IPP Printer
+----------------------------------------------------------- > +----------------------------------------------------------- >
Get status and/or capabilities of Printer Get status and/or capabilities of Printer
< -----------------------------------------------------------+ < -----------------------------------------------------------+
Status/Capabilities Status/Capabilities
Clients will need to get information about Clients will need to get information about
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- Static capabilities of the device - Static capabilities of the device
- Dynamic state of the Printer (e.g. out of paper) - Dynamic state of the Printer (e.g. out of paper)
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- State of a specific job owned by this client - State of a specific job owned by this client
- State of all jobs owned by this client - State of all jobs owned by this client
- queued - queued
- printing - printing
- completed - completed
- Job submission attributes supported/required - Job submission attributes supported/required
- scheduling attributes (e.g. priority) - scheduling attributes (e.g. priority)
- production attributes (e.g. number of copies) - production attributes (e.g. number of copies)
4.5. ASYNCHRONOUS NOTIFICATION 4.5. ASYNCHRONOUS NOTIFICATION
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Asynchronous notification of Printer event Asynchronous notification of Printer event
Clients must be able to request asynchronous notification for Clients must be able to request asynchronous notification for
Printer events such as Printer events such as
- job completion - job completion
- a fatal error that requires the job to be resubmitted - a fatal error that requires the job to be resubmitted
- a condition that severely impacts a queued job for this client - a condition that severely impacts a queued job for this client
e.g. printer is out of paper e.g. printer is out of paper
Note: end-user notification is a V1.0 requirement while operator Note: end-user notification is a V1.0 design goal while operator
notification is for V2.0. notification is for V2.0.
4.6. JOB CANCELING 4.6. JOB CANCELING
Client IPP Printer Client IPP Printer
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+----------------------------------------------------------- > +----------------------------------------------------------- >
Cancel the named job as indicated Cancel the named job as indicated
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< -----------------------------------------------------------+ < -----------------------------------------------------------+
Response (did it or not) Response (did it or not)
Similarly clients must be able to make changes to jobs which have Similarly clients must be able to make changes to jobs which have
been submitted and are queued for printing. Changing of job been submitted and are queued for printing. Changing of job
attributes should also be supported. Job modifications, holding attributes should also be supported. Job modifications, holding
and releasing of jobs are not requirements for IPP v1.0. and releasing of jobs are not included in the design goals for
IPP v1.0.
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Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
5. COPYRIGHT 5. COPYRIGHT
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1997. All Rights Reserved.
This document and translations of it may be copied and furnished This document and translations of it may be copied and furnished
to others, and derivative works that comment on or otherwise to others, and derivative works that comment on or otherwise
explain it or assist in its implementation may be prepared, explain it or assist in its implementation may be prepared,
copied, published and distributed, in whole or in part, without copied, published and distributed, in whole or in part, without
restriction of any kind, provided that the above copyright notice restriction of any kind, provided that the above copyright notice
and this paragraph are included on all such copies and derivative and this paragraph are included on all such copies and derivative
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be revoked by the Internet Society or its successors or assigns. be revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on This document and the information contained herein is provided on
an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE
OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE." PURPOSE."
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6. REFERENCES 6. REFERENCES
RFC1179 - Line Printer Daemon Protocol RFC1179 - Line Printer Daemon Protocol
RFC1759 - Printer MIB RFC1759 - Printer MIB
ISO/IEC 10175, Document Printing Application ISO/IEC 10175, Document Printing Application
[IPP LPD]
Herriot, R., Hastings, T., Jacobs, N., Martin, J.,
"Mapping between LPD and IPP Protocols",
draft-ietf-ipp-lpd-ipp-map-04.txt, June 1998.
[IPP-MOD]
Isaacson, S., deBry, R., Hastings, T., Herriot, R., Powell, P.,
"Internet Printing Protocol/1.0: Model and Semantics"
draft-ietf-ipp-mod-10.txt, June, 1998.
[IPP-PRO]
Herriot, R., Butler, S., Moore, P., Tuner, R.,
"Internet Printing Protocol/1.0: Encoding and Transport",
draft-ietf-ipp-pro-06.txt, June, 1998.
[IPP-RAT]
Zilles, S., "Rationale for the Structure and Model and Protocol
for the Internet Printing Protocol",
draft-ietf-ipp-rat-03.txt, June, 1998.
[IPP-REQ]
(this document)
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Copyright(C) The Internet Society 1998. All Rights Reserved.
7. ACKNOWLEDGMENTS 7. ACKNOWLEDGMENTS
This document draws heavily from preliminary work done by others This document draws heavily from preliminary work done by others
especially in the Printer Working Group (PWG). The author especially in the Printer Working Group (PWG). The author
gratefully acknowledges the specific contributions of: gratefully acknowledges the specific contributions of:
Scott Isaacson Scott Isaacson Roger Debry
Novell IBM Novell IBM
_ rdebry@us1.ibm.com Roger Debry scott isaacson@novell.com sisaacson@novell.com rdebry@us.ibm.com
Carl-Uno Manros Robert Herriot Carl-Uno Manros Robert Herriot
Xerox Sun Xerox Sun
manros@cp10.es.xerox.com Robert.Herriot@eng.sun.com manros@cp10.es.xerox.com Robert.Herriot@eng.sun.com
Tom Hastings Peter Zehler Tom Hastings Peter Zehler
Xerox Xerox Xerox Xerox
hastings@cp10.es.xerox.com pzehler@channels.mc_.xerox.com hastings@cp10.es.xerox.com Peter.Zehler@usa.xerox.com
8. AUTHOR'S ADDRESS 8. AUTHOR'S ADDRESS
F.D. (Don) Wright F.D. (Don) Wright
Lexmark International Lexmark International
C14/035-3 C14/035-3
740 New Circle Rd 740 New Circle Rd
Lexington, KY 40550 Lexington, KY 40550
Phone: 606-232-4808 Phone: 606-232-4808
Fax: 606-232-6740 Fax: 606-232-6740
E-mail: don@lexmark.com E-mail: don@lexmark.com
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9. APPENDIX - DETAILED SCENARIOS 9. APPENDIX - DETAILED SCENARIOS
The following are more detailed scenarios illustrating how the The following are more detailed scenarios illustrating how the
Internet Printing Protocol is expected to be used as a part of a Internet Printing Protocol is expected to be used as a part of a
complete Internet Printing system. Some parts of the scenarios complete Internet Printing system. Some parts of the scenarios
include concepts, functions and information that may be outside include concepts, functions and information that may be outside
of the scope of version 1.0 of IPP (e.g. cost per page, payments of the scope of version 1.0 of IPP (e.g. cost per page, payments
means available, etc.) The information contained herein is meant means available, etc.) The information contained herein is meant
to be generic. There may not be an exact wording or terminology to be generic. There may not be an exact wording or terminology
match between these scenarios and the implementation documents. match between these scenarios and the implementation documents.
skipping to change at page 25, line 5 skipping to change at page 27, line 5
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Printer "Color-A" Printer "Color-A"
- prints color, prints transparencies - prints color, prints transparencies
- prints Postscript - prints Postscript
- in room H-6, building 003 - in room H-6, building 003
- driver ABC-Postscript-V1.3 required, here is URI - driver ABC-Postscript-V1.3 required, here is URI
- cost is $.45 per page for color transparencies - cost is $.45 per page for color transparencies
- limit is 10 pages per job - limit is 10 pages per job
- authentication required to use printer - authentication required to use printer
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
- printer is unattended - printer is unattended
- help desk at x5001 - help desk at x5001
Printer "Color-B" Printer "Color-B"
- prints color, prints transparencies - prints color, prints transparencies
- prints Postscript - prints Postscript
- in room J-10, building 003 - in room J-10, building 003
- driver XYZ-Postscript-V2.4 required, here is URI - driver XYZ-Postscript-V2.4 required, here is URI
- cost is $1.25 page for color transparencies - cost is $1.25 page for color transparencies
- limit is 5 pages per job - limit is 5 pages per job
- authentication is required to use printer - authentication is required to use printer
- printer is unattended - printer is unattended
- help desk at x5001 - help desk at x5001
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.2. PRINTER DISCOVERY ACROSS ENTERPRISES 9.2. PRINTER DISCOVERY ACROSS ENTERPRISES
A user in Company A wants to find a public printer in a business A user in Company A wants to find a public printer in a business
partner's enterprise (Company B) on which to print a purchase partner's enterprise (Company B) on which to print a purchase
order. The client is behind one corporate firewall and the order. The client is behind one corporate firewall and the
directory service and the printer are behind a different directory service and the printer are behind a different
corporate firewall. Drivers for all supported printers are corporate firewall. Drivers for all supported printers are
available from the server they are associated with. A web page is available from the server they are associated with. A web page is
provided for end user support for public printers. provided for end user support for public printers.
skipping to change at page 27, line 5 skipping to change at page 29, line 5
- help available at http://xerox/elSegundo/publicPrinters - help available at http://xerox/elSegundo/publicPrinters
Printer "Public-B" Printer "Public-B"
- prints black and white - prints black and white
- prints PCL/5e - prints PCL/5e
- is in El Segundo, room J-10, building A - is in El Segundo, room J-10, building A
- driver XYZ-PCL-V2.4 required, here is URI - driver XYZ-PCL-V2.4 required, here is URI
- printer is public - printer is public
- help available at http://xerox/elSegundo/publicPrinters - help available at http://xerox/elSegundo/publicPrinters
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.3. PRINTER DISCOVERY ON THE INTERNET -LOGICAL OPERATIONS 9.3. PRINTER DISCOVERY ON THE INTERNET -LOGICAL OPERATIONS
A student wants to print a paper on a printer at his neighborhood A student wants to print a paper on a printer at his neighborhood
Kinko's print shop. The report was written using Microsoft Word. Ink-o's print shop. The report was written using Microsoft Word.
The student is interested in the cost of printing since his The student is interested in the cost of printing since his
budget is limited. Note the use of logical operators to find this budget is limited. Note the use of logical operators to find this
information. information.
Client Kinko's Directory Service Client Ink-o's Directory Service
+---------------------------------------------------------- > +---------------------------------------------------------- >
Find a Printer with these characteristics Find a Printer with these characteristics
- prints color or black and white - prints color or black and white
- costs less than $.50 per page - costs less than $.50 per page
- tell me about resolution and marking technology - tell me about resolution and marking technology
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Printer "Color-A" Printer "Color-A"
- prints color - prints color
- 600 dpi laser printer - 600 dpi laser printer
- prints Postscript - prints Postscript
- driver ABC-Postscript-V1.3 required, here is URI - driver ABC-Postscript-V1.3 required, here is URI
- cost is $.50 per page for color - cost is $.50 per page for color
- payment required prior to submitting print job - payment required prior to submitting print job
- here is URI for more information on Kinko's - here is URI for more information on Ink-o's
Printer "Mono-B" Printer "Mono-B"
- prints black and white - prints black and white
- 300 dpi inkjet printer - 300 dpi inkjet printer
- prints Postscript - prints Postscript
- driver XYZ-Postscript-V2.4 required, here is URI - driver XYZ-Postscript-V2.4 required, here is URI
- cost is $0.35 page for black and white - cost is $0.35 page for black and white
- payment required prior to submitting print job - payment required prior to submitting print job
- here is URI for more information on Kinko's - here is URI for more information on Ink-o's
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
9.4. PRINTER DISCOVERY ON THE INTERNET - AUTHENTICATION 9.4. PRINTER DISCOVERY ON THE INTERNET - AUTHENTICATION
An executive in her hotel room is finishing an important An executive in her hotel room is finishing an important
presentation on her laptop computer. She connects to a local presentation on her laptop computer. She connects to a local
print shop through the web to get a copy of her charts printed print shop through the web to get a copy of her charts printed
for tomorrow's presentation. She must find a print shop that is for tomorrow's presentation. She must find a print shop that is
convenient to her hotel and can print color transparencies. She convenient to her hotel and can print color transparencies. She
wants to be sure that the printer can be authenticated and can wants to be sure that the printer can be authenticated and can
accept encrypted data. accept encrypted data.
Client SirSpeedy Directory Service Client SirZippy Directory Service
+---------------------------------------------------------- > +---------------------------------------------------------- >
Find a Printer with these characteristics Find a Printer with these characteristics
- prints color transparencies - prints color transparencies
- is in Boulder, Colorado - is in Boulder, Colorado
- Printer can be authenticated - Printer can be authenticated
- Printer supports encryption - Printer supports encryption
Tell me when you are open for business Tell me when you are open for business
skipping to change at page 28, line 36 skipping to change at page 30, line 37
Tell me when you are open for business Tell me when you are open for business
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Printer "Color-A" Printer "Color-A"
- prints color transparencies - prints color transparencies
- prints Postscript - prints Postscript
- driver ABC-Postscript-V1.3 required, here is URI - driver ABC-Postscript-V1.3 required, here is URI
- payment required prior to submitting print job - payment required prior to submitting print job
- Printer can be authenticated - Printer can be authenticated
- Data can be encrypted - Data can be encrypted
- Located at 1670 Pearl Street, Boulder, CO - Located at 1670 Pearl Street, Boulder, CO
- This Branch is open 24 hours a day - This Branch is open 24 hours a day
Printer "Color-B" Printer "Color-B"
- prints color transparencies - prints color transparencies
- prints Postscript - prints Postscript
- driver ABC-Postscript-V1.3 required, here is URI - driver ABC-Postscript-V1.3 required, here is URI
- payment required prior to submitting print job - payment required prior to submitting print job
- Printer can be authenticated - Printer can be authenticated
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
- Data can be encrypted - Data can be encrypted
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
- Located at 1220 Arapahoe, Boulder, CO - Located at 1220 Arapahoe, Boulder, CO
- This Branch is open from 9:00am to 6:30pm - This Branch is open from 9:00am to 6:30pm
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.5. DRIVER DOWNLOAD 9.5. DRIVER DOWNLOAD
An end user in an enterprise wants to print a lengthy report on a An end user in an enterprise wants to print a lengthy report on a
newly installed high speed PostScript printer. Since she will newly installed high speed PostScript printer. Since she will
likely use this printer often, she would like to download a likely use this printer often, she would like to download a
driver and install it on her workstation. She is running Windows driver and install it on her workstation. She is running Windows
95. Note: Driver download is not a V1.0 requirement. 95. Note: Driver download is not a V1.0 design goal.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
Tell me where to find print drivers for you Tell me where to find print drivers for you
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Driver install file is at Driver install file is at
http://www.ibm.com/drivers/NP12a/Win95 http://www.ibm.com/drivers/NP12a/Win95
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.6. SUBMITTING A PRINT JOB AS A FILE 9.6. SUBMITTING A PRINT JOB AS A FILE
An end-user wants to submit a print job. The print file already An end-user wants to submit a print job. The print file already
exists on his workstation. The client and printer are behind the exists on his workstation. The client and printer are behind the
same corporate firewall. The printer is available to anyone same corporate firewall. The printer is available to anyone
behind the firewall and no authorization or authentication is behind the firewall and no authorization or authentication is
required. The data is pushed to the printer. The printer is required. The data is pushed to the printer. The printer is
capable of spooling the output. No errors occur. capable of spooling the output. No errors occur.
Client IPP Printer Client IPP Printer
skipping to change at page 32, line 5 skipping to change at page 34, line 5
- document is in Postscript format - document is in Postscript format
- here is the document to print - here is the document to print
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job accepted and spooled Print job accepted and spooled
- job id = #12345 - job id = #12345
- current state of print job = spooled - current state of print job = spooled
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = printing - printer state = printing
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.7. SUBMITTING A PRINT JOB WITH TWO DOCUMENTS 9.7. SUBMITTING A PRINT JOB WITH TWO DOCUMENTS
An end-user wants to submit a print job. The print file already An end-user wants to submit a print job. The print file already
exists on his workstation. The client and printer are behind the exists on his workstation. The client and printer are behind the
same corporate firewall. The printer is available to anyone same corporate firewall. The printer is available to anyone
behind the firewall and no authorization or authentication is behind the firewall and no authorization or authentication is
required. The data is pushed to the printer. The job consists of required. The data is pushed to the printer. The job consists of
two separate documents. The printer is capable of spooling the two separate documents. The printer is capable of spooling the
output. No errors occur. output. No errors occur.
skipping to change at page 33, line 5 skipping to change at page 35, line 5
< ----------------------------------------------------------+ < ----------------------------------------------------------+
- OK - OK
+---------------------------------------------------------- > +---------------------------------------------------------- >
- here is the document to print, it is the last document. - here is the document to print, it is the last document.
< ----------------------------------------------------------+ < ----------------------------------------------------------+
- OK - OK
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.8. SUBMITTING A PRINT JOB AS A FILE, PRINTING FAILS 9.8. SUBMITTING A PRINT JOB AS A FILE, PRINTING FAILS
An end-user wants to submit a print job. The print file already An end-user wants to submit a print job. The print file already
exists on his workstation. The client and printer are behind the exists on his workstation. The client and printer are behind the
same corporate firewall. The printer is available to anyone same corporate firewall. The printer is available to anyone
behind the firewall and no authorization or authentication is behind the firewall and no authorization or authentication is
required. The data is pushed to the printer. The printer is not required. The data is pushed to the printer. The printer is not
capable of spooling the output so it begins printing while still capable of spooling the output so it begins printing while still
receiving the file. An error occurs and the printer cannot receiving the file. An error occurs and the printer cannot
complete printing (in this case the user requires A4 paper and complete printing (in this case the user requires A4 paper and
skipping to change at page 34, line 5 skipping to change at page 35, line 40
- here is the document to print - here is the document to print
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job accepted Print job accepted
- printing failed - printing failed
- current state of print job = canceled (A4 not available) - current state of print job = canceled (A4 not available)
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = ready - printer state = ready
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
9.9. SUBMITTING A PRINT JOB WITH AUTHENTICATION, PRIVACY AND 9.9. SUBMITTING A PRINT JOB WITH AUTHENTICATION, PRIVACY AND
PAYMENT PAYMENT
A traveling executive needs to print a set of transparencies for A traveling executive needs to print a set of transparencies for
an important business meeting. The charts are in Lotus Freelance an important business meeting. The charts are in Lotus Freelance
format on his notebook computer. He has located a SirSpeedy print format on his notebook computer. He has located a SirZippy print
shop near his hotel that will print color transparencies. Because shop near his hotel that will print color transparencies. Because
the information on the charts is sensitive, he wants to be sure 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 that his data is sent to the Printer in an encrypted format. He
also wants to authenticate the Printer. The Printer also also wants to authenticate the Printer. The Printer also
authenticates the user. Payment occurs across the Internet. authenticates the user. Payment occurs across the Internet.
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Mutual authentication and exchange of secret keys Mutual authentication and exchange of secret keys
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here is a print job (encrypted) Here is a print job (encrypted)
- job name = MyJob - job name = MyJob
skipping to change at page 35, line 5 skipping to change at page 37, line 5
- current state of print job = spooled - current state of print job = spooled
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = printing - printer state = printing
- payment required to proceed with job - payment required to proceed with job
- pick up at 230 East Main after 3:30pm today - pick up at 230 East Main after 3:30pm today
+---------------------------------------------------------- > +---------------------------------------------------------- >
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Payment transaction Payment transaction
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.10. SUBMITTING A PRINT JOB WITH DECRYPTION ERROR 9.10. SUBMITTING A PRINT JOB WITH DECRYPTION ERROR
A traveling executive needs to print a set of transparencies for A traveling executive needs to print a set of transparencies for
an important business meeting. The charts are in Lotus Freelance an important business meeting. The charts are in Lotus Freelance
format on his notebook computer. He has located a SirSpeedy print format on his notebook computer. He has located a SirZippy print
shop near his hotel that will print color transparencies. Because shop near his hotel that will print color transparencies. Because
the information on the charts is sensitive, he wants to be sure 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 that his data is sent to the printer in an encrypted format. He
also wants to authenticate the printer. The printer also also wants to authenticate the printer. The printer also
authenticates the user. Payment occurs across the Internet. An authenticates the user. Payment occurs across the Internet. An
error occurs during decryption. error occurs during decryption.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
skipping to change at page 36, line 5 skipping to change at page 38, line 5
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = printing - printer state = printing
- payment required to proceed with job - payment required to proceed with job
- pick up at 230 East Main after 3:30pm today - pick up at 230 East Main after 3:30pm today
+---------------------------------------------------------- > +---------------------------------------------------------- >
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Payment transaction Payment transaction
. .
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
. .
. .
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Asynchronous response (email in this case) Asynchronous response (email in this case)
- decryption failed on job #12345 - decryption failed on job #12345
- no pages printed - no pages printed
- current state of job = aborted - current state of job = aborted
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.11. SUBMITTING A PRINT JOB WITH AUTHENTICATION 9.11. SUBMITTING A PRINT JOB WITH AUTHENTICATION
An end-user wants to submit a print job. The print file already An end-user wants to submit a print job. The print file already
exists on his workstation. The client and printer are behind the exists on his workstation. The client and printer are behind the
same corporate firewall. The printer is available to anyone same corporate firewall. The printer is available to anyone
behind the firewall but authentication and authorization is behind the firewall but authentication and authorization is
required. Authorization takes place using the authenticated end- required. Authorization takes place using the authenticated end-
user's name. The data is pushed to the printer. The printer is user's name. The data is pushed to the printer. The printer is
capable of spooling the output. capable of spooling the output.
skipping to change at page 38, line 5 skipping to change at page 40, line 5
- document is in Postscript format - document is in Postscript format
- here is the document to print - here is the document to print
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job accepted and spooled Print job accepted and spooled
- job id = #12345 - job id = #12345
- current state of print job = spooled - current state of print job = spooled
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = printing - printer state = printing
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.12. SUBMITTING A PRINT JOB GENERATED DYNAMICALLY 9.12. SUBMITTING A PRINT JOB GENERATED DYNAMICALLY
An end-user wants to submit a print job. The print data is An end-user wants to submit a print job. The print data is
generated dynamically and is being transmitted by a printer generated dynamically and is being transmitted by a printer
driver on the client workstation as available. The client and driver on the client workstation as available. The client and
printer are behind the same corporate firewall. The printer is printer are behind the same corporate firewall. The printer is
available to anyone behind the firewall and no authentication and available to anyone behind the firewall and no authentication and
authorization is required. The data is pushed to the printer. The authorization is required. The data is pushed to the printer. The
printer is capable of spooling the output. No error occurs. printer is capable of spooling the output. No error occurs.
skipping to change at page 39, line 5 skipping to change at page 41, line 5
- document is in Postscript format - document is in Postscript format
- here is the print job - here is the print job
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print data accepted and spooling started Print data accepted and spooling started
- job id = #12345 - job id = #12345
- current job state = spooled - current job state = spooled
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = printing - printer state = printing
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.13. SUBMITTING A PRINT JOB WITH A PRINTER JAM - CANCELED 9.13. SUBMITTING A PRINT JOB WITH A PRINTER JAM - CANCELED
An end-user wants to submit a print job. The print data is An end-user wants to submit a print job. The print data is
generated dynamically and is being transmitted by a printer generated dynamically and is being transmitted by a printer
driver on the client workstation as available. The client and driver on the client workstation as available. The client and
printer are behind the same corporate firewall. The printer is printer are behind the same corporate firewall. The printer is
available to anyone behind the firewall and no authentication and available to anyone behind the firewall and no authentication and
authorization is required. The data is pushed to the printer. The authorization is required. The data is pushed to the printer. The
printer is not capable of spooling the output. The printer jams printer is not capable of spooling the output. The printer jams
notifies the user and the user chooses to cancel the job. notifies the user and the user chooses to cancel the job.
skipping to change at page 40, line 5 skipping to change at page 42, line 5
+---------------------------------------------------------- > +---------------------------------------------------------- >
- Cancel job #12345 - Cancel job #12345
* Printer flushes remaining data * Printer flushes remaining data
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job terminated Print job terminated
- current job state = canceled - current job state = canceled
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = jammed - printer state = jammed
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.14. SUBMITTING A PRINT JOB WITH A PRINTER JAM - RECOVERED 9.14. SUBMITTING A PRINT JOB WITH A PRINTER JAM - RECOVERED
An end-user wants to submit a print job. The print data is An end-user wants to submit a print job. The print data is
generated dynamically and is being transmitted by a printer generated dynamically and is being transmitted by a printer
driver on the client workstation as available. The client and driver on the client workstation as available. The client and
printer are behind the same corporate firewall. The printer is printer are behind the same corporate firewall. The printer is
available to anyone behind the firewall and no authentication and available to anyone behind the firewall and no authentication and
authorization is required. The data is pushed to the printer. The authorization is required. The data is pushed to the printer. The
printer is not capable of spooling the output. The printer jams, printer is not capable of spooling the output. The printer jams,
notifies the user and the user clears the jam and elects to notifies the user and the user clears the jam and elects to
skipping to change at page 41, line 5 skipping to change at page 43, line 5
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here is the last part of the document to print Here is the last part of the document to print
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job received Print job received
- current job state = printing - current job state = printing
- submission time = 02/12/97, 15:35 - submission time = 02/12/97, 15:35
- printer state = printing - printer state = printing
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.15. SUBMITTING A PRINT JOB WITH SERVER PULL 9.15. SUBMITTING A PRINT JOB WITH SERVER PULL
An end-user wants to submit a print job. The print data is in a 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. The file and is publicly available. It is pulled by the printer. The
client and printer are behind the same corporate firewall. The client and printer are behind the same corporate firewall. The
printer is available to anyone behind the firewall and no printer is available to anyone behind the firewall and no
authentication and authorization is required. The printer is authentication and authorization is required. The printer is
capable of spooling the output. Printing may start before the capable of spooling the output. Printing may start before the
entire job has been pulled. entire job has been pulled.
skipping to change at page 42, line 5 skipping to change at page 44, line 5
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here it is Here it is
Note: Failure to find the file, would end the transaction Note: Failure to find the file, would end the transaction
with an error at this point and an asynchronous with an error at this point and an asynchronous
notification would be send to the Client. notification would be send to the Client.
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Data received Data received
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.16. SUBMITTING A PRINT JOB WITH REFERENCED RESOURCES 9.16. SUBMITTING A PRINT JOB WITH REFERENCED RESOURCES
An end-user wants to submit a print job. Part of the print data An end-user wants to submit a print job. Part of the print data
is on a file on the user's workstation. It is pushed by the is on a file on the user's workstation. It is pushed by the
client, but the print job requires some resource not included in client, but the print job requires some resource not included in
the print file. The client and printer are behind the same the print file. The client and printer are behind the same
corporate firewall. The printer is available to anyone behind the corporate firewall. The printer is available to anyone behind the
firewall and no authentication and authorization is required. The firewall and no authentication and authorization is required. The
printer is capable of spooling the output. No errors occur. printer is capable of spooling the output. No errors occur.
skipping to change at page 43, line 5 skipping to change at page 45, line 5
< ----------------------------------------------------------+ < ----------------------------------------------------------+
- OK - OK
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Get the external resource Get the external resource
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here it is Here it is
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.17. GETTING CAPABILITIES
9.17. GETTING CAPABILITIES
9.17.1. Submission Attributes 9.17.1. Submission Attributes
An end-user wants to get the production and scheduling attributes An end-user wants to get the production and scheduling attributes
that are supported or required when submitting jobs to this that are supported or required when submitting jobs to this
printer. The client will use these attributes when forming the printer. The client will use these attributes when forming the
subsequent print request. subsequent print request.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
I'm going to submit a Postscript job I'm going to submit a Postscript job
skipping to change at page 44, line 5 skipping to change at page 46, line 5
+---------------------------------------------------------- > +---------------------------------------------------------- >
Please tell me the Please tell me the
- resolution of the printer - resolution of the printer
- the marking technology of the printer - the marking technology of the printer
- PDLs supported - PDLs supported
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Printer resolution = 600 dpi Printer resolution = 600 dpi
Marking Technology = laser Marking Technology = laser
PDLS supported = Postscript level 2, PCL/6 PDLS supported = Postscript level 2, PCL/6
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.18. GETTING STATUS
9.18. GETTING STATUS
9.18.1. Printer State/Status 9.18.1. Printer State/Status
An end-user wants to determine the state or status of the An end-user wants to determine the state or status of the
printer. printer.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
What is the state of the printer? What is the state of the printer?
skipping to change at page 45, line 4 skipping to change at page 46, line 47
An end user wants to get a list of all of the jobs he has An end user wants to get a list of all of the jobs he has
submitted to this Printer. submitted to this Printer.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
Please tell me the status of my jobs Please tell me the status of my jobs
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
Job #00012 is complete Job #00012 is complete
Printed at 12:35 on 01/23/97 Printed at 12:35 on 01/23/97
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
Job #09876 is printing Job #09876 is printing
Job #12345 is queued Job #12345 is queued
it is number 3 in the queue it is number 3 in the queue
Job #34567 is queued Job #34567 is queued
it is number 7 in the queue it is number 7 in the queue
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.19. ASYNCHRONOUS NOTIFICATION
9.19. ASYNCHRONOUS NOTIFICATION
9.19.1. Job Completion 9.19.1. Job Completion
An end-user wants to get notification of events that affect his An end-user wants to get notification of events that affect his
print jobs. Print job completes without error. print jobs. Print job completes without error.
Client IPP Printer Client IPP Printer
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job #123 completed Print job #123 completed
skipping to change at page 47, line 5 skipping to change at page 49, line 5
print jobs. Print job fails. Printer is unattended. print jobs. Print job fails. Printer is unattended.
Client IPP Printer Client IPP Printer
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print job #123 failed Print job #123 failed
- total pages printed = 15 - total pages printed = 15
- number of pages submitted = 25 - number of pages submitted = 25
- printer-state = jammed - printer-state = jammed
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.20. CANCEL A JOB 9.20. CANCEL A JOB
The end-user submits a print job and later decides to cancel it. The end-user submits a print job and later decides to cancel it.
Client IPP Printer Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Authentication. Authentication.
+---------------------------------------------------------- > +---------------------------------------------------------- >
Cancel job #1234 Cancel job #1234
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Job #1234 Canceled Job #1234 Canceled
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.21. END TO END SCENARIO - WITHIN AN ENTERPRISE 9.21. END TO END SCENARIO - WITHIN AN ENTERPRISE
An office worker prints on shared departmental printers. All An office worker prints on shared departmental printers. All
printers in the office are public, that is, no authentication or printers in the office are public, that is, no authentication or
authorization is required. Printers are protected from external authorization is required. Printers are protected from external
access by a firewall. No billing or accounting is required. Most access by a firewall. No billing or accounting is required. Most
printing is done from desktop applications. A help desk is printing is done from desktop applications. A help desk is
provided for printing problems. Standard operating systems and provided for printing problems. Standard operating systems and
applications are used. Drivers are available, but are installed applications are used. Drivers are available, but are installed
manually by support personnel. This scenario assumes that drivers manually by support personnel. This scenario assumes that drivers
have been installed and that drivers are not IPP aware, that is, have been installed and that drivers are not IPP aware, that is,
they cannot communicate across an IPP connection to obtain status they cannot communicate across an IPP connection to obtain status
and capabilities. IPP printers appear in application pull-down and capabilities. IPP printers appear in application pull-down
menus. Printer configuration data is hard wired into the driver. menus. Printer configuration data is hard wired into the driver.
Client IPP Printer
End-user selects print from the application pull down menu. An End-user selects print from the application pull down menu. An
IPP printer is selected from the list of Printers offered IPP printer is selected from the list of Printers offered
The driver puts up a dialogue with hard-wired set of options The driver puts up a dialogue with hard-wired set of options
for this printer. The end-user makes choices and submits job. for this printer. The end-user makes choices and submits job.
Client IPP Printer
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here is a print job Here is a print job
- job-name = memo-to-boss - job-name = memo-to-boss
- notify me by email when job is complete - notify me by email when job is complete
- print on us-letter-white paper - print on us-letter-white paper
- print 1 copy - print 1 copy
- print at normal quality - print at normal quality
- print on 1 side - print on 1 side
- give me the state of the printer in response - give me the state of the printer in response
The driver generates the print data and passes it to the IPP The driver generates the print data and passes it to the IPP
driver a piece at a time as it is generated. driver a piece at a time as it is generated.
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here is the print data Here is the print data
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Print data received, file is spooled Print data received, file is spooled
- printer state = printing - printer state = printing
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
- time submitted = 2/12/97, 15:35 - time submitted = 2/12/97, 15:35
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
- current job state = spooled - current job state = spooled
Client adds this job to list of current jobs. List of jobs and 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. 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 End-user selects job #1234 from list and clicks on it to see its
status. status.
+---------------------------------------------------------- > +---------------------------------------------------------- >
Give me the state of job #1234 Give me the state of job #1234
skipping to change at page 50, line 5 skipping to change at page 52, line 5
Job #1234 state = spooled Job #1234 state = spooled
- it is number 3 in the queue - it is number 3 in the queue
- printer state = printing - printer state = printing
The job completes without error The job completes without error
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Job #1234 completed Job #1234 completed
12 of 12 pages printed 12 of 12 pages printed
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.22. END TO END SCENARIO - ACROSS ENTERPRISES 9.22. END TO END SCENARIO - ACROSS ENTERPRISES
An office worker in Company A needs to print an office document An office worker in Company A needs to print an office document
on a "public" printer at Company B, a business partner. Both on a "public" printer at Company B, a business partner. Both
companies have corporate firewalls so the print request must flow companies have corporate firewalls so the print request must flow
out of A's firewall and into B's firewall. The office worker can out of A's firewall and into B's firewall. The office worker can
look at public printers in Company B's directory service. The look at public printers in Company B's directory service. The
document is generated by a desktop application. Since the printer document is generated by a desktop application. Since the printer
is "public" no authentication or authorization is required. A is "public" no authentication or authorization is required. A
driver is downloaded. The driver is IPP aware, that is, it can driver is downloaded. The driver is IPP aware, that is, it can
skipping to change at page 51, line 5 skipping to change at page 53, line 5
Client Public-A Client Public-A
+---------------------------------------------------------- > +---------------------------------------------------------- >
Where can I find a driver for you? Where can I find a driver for you?
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Drivers at http://www.lexmark.com/pubprinters/a/os245 Drivers at http://www.lexmark.com/pubprinters/a/os245
End user gets driver and installs it on his PC. End user gets driver and installs it on his PC.
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
End-user selects print from the application pull down menu. End-user selects print from the application pull down menu.
"Public-A" is selected from the list of Printers offered "Public-A" is selected from the list of Printers offered
+---------------------------------------------------------- > +---------------------------------------------------------- >
I'm going to submit a print job I'm going to submit a print job
give me your job submission attributes give me your job submission attributes
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Production attributes for this Printer are: Production attributes for this Printer are:
- medium-select = us-letter-white, us-legal-white - medium-select = us-letter-white, us-legal-white
skipping to change at page 52, line 5 skipping to change at page 54, line 5
- give me the state of the printer in response - give me the state of the printer in response
The driver generates the print data and passes it to the IPP The driver generates the print data and passes it to the IPP
driver a piece at a time. driver a piece at a time.
+---------------------------------------------------------- > +---------------------------------------------------------- >
Here is the print data Here is the print data
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
Print data received, and spooling started Print data received, and spooling started
print job id = #1234 print job id = #1234
Print data received, file is spooled Print data received, file is spooled
- printer state = printing - printer state = printing
- time submitted = 2/12/97, 15:35 - time submitted = 2/12/97, 15:35
- current job state = spooled - current job state = spooled
Client adds this job to list of current jobs. List of jobs and Client adds this job to list of current jobs. List of jobs and
skipping to change at page 53, line 5 skipping to change at page 55, line 5
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Job #1234 state = spooled Job #1234 state = spooled
- it is number 3 in the queue - it is number 3 in the queue
- printer state = printing - printer state = printing
* The job completes without error * The job completes without error
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Job #1234 completed Job #1234 completed
12 of 12 pages printed 12 of 12 pages printed
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
9.23. END TO END SCENARIO - ON THE INTERNET 9.23. END TO END SCENARIO - ON THE INTERNET
An executive in her hotel room is finishing an important An executive in her hotel room is finishing an important
presentation on her laptop computer. She connects to a local presentation on her laptop computer. She connects to a local
print shop through the web to get a copy of her charts printed print shop through the web to get a copy of her charts printed
for tomorrow's presentation. She must find a print shop that is for tomorrow's presentation. She must find a print shop that is
convenient and can print color transparencies. She must download convenient and can print color transparencies. She must download
and temporarily install a driver in order to generate the PDL and temporarily install a driver in order to generate the PDL
required by the print shop. Mutual authentication is required by required by the print shop. Mutual authentication is required by
the printshop and payment must be made in advance. The job is the printshop and payment must be made in advance. The job is
encrypted on the wire to prevent eavesdropping. encrypted on the wire to prevent eavesdropping.
End-user completes presentation. She goes to the web and connects End-user completes presentation. She goes to the web and connects
to the SirSpeedy home page. to the SirZippy home page.
Client SirSpeedy Directory Service Client SirZippy Directory Service
+---------------------------------------------------------- > +---------------------------------------------------------- >
Find me a printer with these characteristics Find me a printer with these characteristics
- Near Market Street in San Jose - Near Market Street in San Jose
- Prints color transparencies - Prints color transparencies
- drivers can be downloaded - drivers can be downloaded
- supports privacy (encryption) - supports privacy (encryption)
- -
Available Printers matching these characteristics are looked up Available Printers matching these characteristics are looked up
in the Directory Service in the Directory Service
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Printer "Color-A" Printer "Color-A"
- located at 123 First Street in San Jose - located at 123 First Street in San Jose
- URI is http://www.SirSpeedy.com/FirstStreet/Color-A - URI is http://www.SirZippy.com/FirstStreet/Color-A
- prints color transparencies - prints color transparencies
- 600 dpi laser - 600 dpi laser
- driver ABC-Postscript-V1.3 available at this URI - driver ABC-Postscript-V1.3 available at this URI
- cost = $.75 per page - cost = $.75 per page
- authentication required to use printer - authentication required to use printer
- payment required prior to printing - payment required prior to printing
Printer "Color-B" Printer "Color-B"
- located at 67 San Carlos Street, San Jose - located at 67 San Carlos Street, San Jose
- URI is http://www.SirSpeedy.com/SanCarlos/Color-B - URI is http://www.SirZippy.com/SanCarlos/Color-B
Expires: Dec 30, 1998
Copyright(C) The Internet Society 1998. All Rights Reserved.
Expires: April 15, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved.
- prints color transparencies - prints color transparencies
- 1200 dpi laser - 1200 dpi laser
- driver XYZ-Poscscript-V4.3 available at this URI - driver XYZ-Poscscript-V4.3 available at this URI
- cost = $1.25 per page - cost = $1.25 per page
- authentication required to use printer - authentication required to use printer
- payment required prior to printing - payment required prior to printing
- -
- more information at this URI - more information at this URI
The user decides to use the first printer because it is closer. The user decides to use the first printer because it is closer.
skipping to change at page 55, line 5 skipping to change at page 57, line 5
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Production attributes for this Printer are: Production attributes for this Printer are:
- medium-select = us-letter-white, us-legal-white - medium-select = us-letter-white, us-legal-white
- default is us-letter-white - default is us-letter-white
- copies = 1,2,3,4,5 - copies = 1,2,3,4,5
- default is 1 - default is 1
- print-quality = draft, normal, high - print-quality = draft, normal, high
- default is draft - default is draft
- sides = 1-sided, 2-sided-long-edge - sides = 1-sided, 2-sided-long-edge
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
- default is 2-sided-long-edge - default is 2-sided-long-edge
Job scheduling attributes for this Printer are: Job scheduling attributes for this Printer are:
- job-priority = 1,2,3 - job-priority = 1,2,3
default = 3 default = 3
Driver puts up dialogue with available options and fills in the Driver puts up dialogue with available options and fills in the
defaults. defaults.
End-user makes choices and submits job End-user makes choices and submits job
skipping to change at page 55, line 49 skipping to change at page 57, line 50
- printer state = printing - printer state = printing
- time submitted = 2/12/97, 15:35 - time submitted = 2/12/97, 15:35
- current job state = held, waiting for payment - current job state = held, waiting for payment
+---------------------------------------------------------- > +---------------------------------------------------------- >
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Payment transaction Payment transaction
< ----------------------------------------------------------+ < ----------------------------------------------------------+
Job is scheduled to print, pick up after 9:00am tomorrow Job is scheduled to print, pick up after 9:00am tomorrow
Thank you for using SirSpeedy Thank you for using SirZippy
Expires: April 15, 1998 Expires: Dec 30, 1998
Copyright(C) The Internet Society 1997. All Rights Reserved. Copyright(C) The Internet Society 1998. All Rights Reserved.
 End of changes. 

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