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Versions: 00                                                            
Service Location Working Group                          Pete St.  Pierre
INTERNET DRAFT                                          Sun Microsystems
                                                            31 July 1997

         Definition of lpr:  URLs for use with Service Location

Status of This Memo

   This document is a submission by the Service Location Working Group
   of the Internet Engineering Task Force (IETF).  Comments should be
   submitted to the srvloc@corp.home.net mailing list.

   Distribution of this memo is unlimited.

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

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   To learn the current status of any Internet-Draft, please check
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   ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast).


   This document defined the service:lpr scheme and attributes
   associated with it.  This template is designed to be used in
   conjuction with the Service Location Protocol [1], but may be
   used with any directory service supporting attribute/value pair

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Status of This Memo                                                    i

Abstract                                                               i

 1. lpr service: URL Scheme                                            1

 2. urlpath Definition                                                 1

 3. Printer Scheme Background                                          1

 4. lpr Service Template                                               2

 5. Attribute Origins                                                  8

 6. References                                                         8

1. lpr service: URL Scheme

   Service Type templates are used to describe in a standard way those
   services which use the service: URL. The template described in this
   document is for the printing protocol defined in RFC 1179 [2], ``Line
   Printer Daemon Protocol''.  The service type for this service: URL is

2. urlpath Definition

   The URL has service specific information that specifies protocol used
   to access the printer, and the name of the print queue.  The syntax
   for the urlpath for specifying this is:

      qname    = 1*[ DIGIT / ALPHA ]
      urlpath  = "/" qname

   A null value the qname assumes the default value, as defined by the
   print server.

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3. Printer Scheme Background

   The printer scheme provides for consistent registration of printer
   services.  The attributes described within this draft are a
   combination of previous works conducted by the IETF Printer MIB WG,
   the IETF IPP WG and the Salutation Consortium.

   The attributes specified are intended to facilitate both automatic
   as well as manual selection of services not to provide service
   statistics or notification.  In short, the target audience of service
   attributes are users, either programatic or end users, where the
   audience of MIB statistics are network managers.

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4. lpr Service Template

   The lpr template, as defined below, conforms to the grammar described
   in ``Service Templates and service:  Schemes''.  Please refer to [2]
   for detailed explaination of the syntax.

        type = lpr

        version = 0.0

        language = en

        description =
            The lpr service template describes the attributes supported by
            network printing devices that support RFC 1179.  These
            devices may be either directly connected to a network, or
            connected to a printer spooler that understands the protocol
            described in RFC 1179.

        url-syntax =
            qname = 1*[ DIGIT / ALPHA ]
            urlpath = "/" qname

        description = STRING
            # This attribute is a free form string that can contain any
            # site-specific descriptive information about this printer.

        make-model = STRING L
            # This attribute is a simple text string defined by the
            # manufacturer that contains some reference to the make
            # and model of the entity being represented to the end-user
            # by this Printer object.  The syntax shall be:
            # vendor-name "/" model-name
            # where the vendor-name is the same as that registered with
            # IANA for use in domain names.
            # For example:  "vendor-x/super-duper-printer".

        location-description = STRING
            # A free form description of this printer's physical location
            # For example:  "2nd floor, near the fire escape"

        location-address = STRING O
            # Pysical/Postal address for this device.  Useful for
            # nailing down a group of printers in a very large corporate
            # network.  For example:  960 Main Street, San Jose, CA 95130

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        operator = STRING L M
            # A person, or persons responsible for maintaining a
            # printer on a day-to-day basis, including such tasks
            # as filling empty media trays, emptying full output trays,
            # replacing toner cartridges, clearing simple paper jams, etc.

        duplex-mode = STRING M
            # The Duplex Mode attribute indicates what duplex
            # capabilities a printer is capable of handling.
            simplex, duplex, left-binding-duplex, right-binding-duplex,
            top-binding-duplex, other

        priority-queue = BOOLEAN O
            # TRUE indicates this printer or print queue is a priority
            # queuing device.

        fonts-supported = STRING L M
            # This attribute takes on a list of fonts that are
            # supported by the printer.

        media-size = STRING L M
            # The standard values defined for media sizes follow
            # the ISO standards.
            iso-a0, iso-a1, iso-a2, iso-a3, iso-a4, iso-a5, iso-a6,
            iso-a7, iso-a8, iso-a9, iso-a10, iso-b0, iso-b1, iso-b2,
            iso-b3, iso-b4, iso-b5, iso-b6, iso-b7, iso-b8, iso-b9,
            iso-b10, na-letter, na-legal, executive, folio, invoice,
            ledger, quarto, iso-c3, iso-c4, iso-c5, iso-c6,
            iso-designated-long, na-10x13-envelope, na-9x12-envelope,
            na-number-10-envelope, na-7x9-envelope, na-7x9-envelope,
            na-9x11-envelope, na-10x14-envelope, na-number-9-envelope,
            na-6x9-envelope, na-10x15-envelope, monarch-envelope, a,
            b, c, d, jis-b0, jis-b1, jis-b2, jis-b3, jis-b4, jis-b5,
            jis-b6, jis-b7, jis-b8, jis-b9, jis-b10, unknown

        media-color = STRING M O
            # The Media color describes the color of what is printed
            # upon.  The value from the default prtInputEntry should be
            # used.
            other, unknown, white, pink, yellow, buff, goldenrod, blue,
            green, transparent

        color-supported = STRING L M O

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            # This attribute specifies whether the Printer supports
            # color and, if so, what type.
            none, highlight, three color, four color, monochromatic

        max-speed = INTEGER O
            # The maximum speed of the printer expressed in Speed units.

        speed-units = STRING O
            # This value determines unit of speed for the Max speed.
            tenThousandthsOfInchesPerHour, micrometersPerHour,
            charactersPerHour, linesPerHour, impressionsPerHour,
            sheetsPerHour, dotRowPerHour, feetPerHour, metersPerHour

        interpreter-language = STRING M L
            PSPrinter, SimpleText
            # The Interpreter Language determines what forms of
            # input the printer can accept and interpret.
            other, PCL, HPGL, PJL, PS, IPDS, PPDS, EscapeP, Epson,
            DIFF, Interpress, ISO6429, LineData, MODCA, REGIS, SCS,
            SPDL, TEK4014, PDS, IGP, CodeV, DSCDSE, WPS, LN03, CCITT,
            QUIC, CPAP, DecPPL, SimpleText, NPAP, DOC, imPress,
            Pinwriter, NPDL, NEC201PL, Automatic, Pages, LIPS, TIFF,
            Diagnostic, PSPrinter, CaPSL, EXCL, LCDS, XES, PCLXL, ART,
            TIPSI, Prescribe, LinePrinter, IDP, XJCL

        paper-output = STRING M L O
            # This attribute describes the mode in which pages output
            # are arranged.
            standard, noncollated sort, collated sort, stack, unknown

        media-direction = STRING O
            # The orientation of the media as it is feed to the
            # printer.
            portrait, landscape, unknown

        print-quality = STRING O
            # This attribute indicates a somewhat subjective evaluation
            # of the overall printing quality.
            draft, normal, high

        resolution = STRING L M O
            # Resolution defines the output quality of the printer.
            # In general, this will be in dots per inch.

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            other, res-100, res-200, res-240, res-300, res-600, res-800,
            res-1200, res-1800, res-100x200, res-300x600, res-600x300,
            res-400x800, res-800x400, res-600x1200, res-1200x600,
            res-1800x600, unknown

        copy-count = INTEGER O
            # Copy count is the maximum number of copies of a document
            # that will be printed as a single job.  A value of -1
            # indicates there is no limit.

        max-job-size = INTEGER O
            # Max job size is the maximum size, in Kilobytes(KB)of a
            # print job that the print queue will accept." A value of
            # -1 indicates there is no limit.

        device-ID = STRING L O
            # This attribute can be used for automatic driver download,
            # database access, or other automatic configuration tasks.
            # It might be used to generate a platform specific id such
            # as the Windows Plug-and-Play id.  It could be the URI for
            # a Java class file.

        finishing = STRING M O
            # This attribute identifies the finishing operations
            # supported by the printer.
            none, staple, staple-top-left, staple-bottom-left,
            staple-top-right, staple-bottom-right, saddle-stitch,
            edge-stitch, punch, cover

        stacking-order = STRING O
            # The current state of the stacking order for the associated
            # output sub-unit.  'firstToLast' means that as pages are
            # output, the front of the next page is placed against the back
            # of the previous page.  'lastToFirst' means that as pages are
            # output, the back of the next page is placed against the front
            # of the previous page.
            unknown, First to Last, Last to First

        delivery-orientation = STRING O
            # Orientation of#pagestashtheearepprintedrandiejectednfromter.
            unknown, face up, face down

        protocol = STRING L O M

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            # The network protcol used to access this printer.
            other, SerialPort, ParallelPort, IEEE1284Port, SCSIPort,
            AppleTalkPAP, LPDServer, NetwareRPrinter, NetwarePServer,
            Port9100, AppSocket, FTP, TFTP, DLCLLCPort, IBM3270,
            IBM5250, Fax, IEEE1394, Transport1, CPAP, PCPrint,
            ServerMessageBlock, PSM, SystemObjectManager, DECLAT,
            NPAP, USB, IRDA, PrintXChange, PortTCP, BidirPortTCP, UNPP,
            AppleTalkADSP, PortSPX, PortHTTP, NDPS, PortIPP

        service-person = STRING O M
            # This attribute is a list of contact names for this printer.
            # It is intended to provide information over and above that
            # of the person responsible for maintaining the printer
            # supplies (operator) above.

        media-type = STRING O M
            # The generalization of the media type available to
            # be printed upon.
            stationery, transparency, envelope, envelope-plain,
            envelope-window, continuous-long, continuous-short,
            tab-stock, multi-part-form, labels, multi-layer, unknown

        media-length = INTEGER O
            # This value indicates the length (in the direction of the
            # printer feed) of the media.  The value -2 indicates that
            # the length is unknown -1 means there is no limit.

        media-thickness = INTEGER O
            # Media size is the thickness of one piece of media.  That
            # media may be any of the valid media types.

        media-thickness-units = STRING O
            # Units of measurement that describes the thickness of the media
            # -1 indicates the units are unknown.
            -1, .0001 inches, micrometers

        media-capacity = INTEGER O
            # The total amount of media that may be contained in a
            # media tray.  Used with the media size, the maximum size of
            # a print job may be calculated.  This assumes the media
            # tray is full.

        media-capacity-units = STRING O

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            # The type unit used to express the media capacity.
            # -1 indicates the units are unknown.
            -1, .0001 inches, micrometers, sheets, feet, meters

        marker-color = STRING O L M
            # The name of the color(s) of this colorant(ink).
            other, unknown, white, red, green, blue, cyan, magenta, yellow,

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5. Attribute Origins

   The following table summarizes the attributes included in the printer
   scheme and their origins.  This table does not include attributes
   required in the "Service Templates and URLs" Draft.

    Attribute     Printer MIB[1]    IPP[5]        Salutation[6]
Printer Description                    X
Make/Model                             X
Location Description                   X
Location Address
Operator               X
Duplex Mode                                          X
Priority Queue                                       X
Fonts Supported                        X
Media Size                             X             X
Media Color            X
Color Supported                        X
Max Speed              X               X
Speed Units            X               X
Interpreter Language                   X             X
Paper Output                           X
Media Direction                        X
Stacking Order         X
Stacking Orientation   X                             X
Print Quality                          X
Resolution             X               X
Max Copy Count                                       X
Max Job Size           X
Device ID                              X
Finishings Supported                   X
Protocol               X

Service Person         X
Media Type             X
Media Length           X
Media Width            X
Media Size Units       X
Media Capacity         X
Media Capacity Units   X

6. References

    [1]J. Veizades, E. Guttman, C. Perkins, and S. Kaplan.  ``Service
    Location Protocol'', RFC 2165.  June 1997.

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    [2]L. McLaughlin III, ``Line Printer Daemon Protocol'',
    RFC 1179.  August 1990.

    [3]E. Guttman, C. Perkins, ``Service Templates and service:
    Schemes'', Work in Progress, July, 1997

    [4]R. Turner, F. Wright, R. Smith, "Printer MIB", Work in
    progress, April 1997.

    [5]K. Carter, S. Isaacson, ``IPP/1.0:  Directory Schema'', Work
    in progress, March 1997.

    [6]Salutation Consortium, Inc., "Salutation Architecture
    Specification V2.0", December 1996.

Authors' Addresses

   Questions about this memo can be directed to:

   Pete St. Pierre
   Sun Microsystems
   901 San Antonio Avenue
   Palo Alto, CA 94043
   Phone: +1 415 786-5790
   email: Pete.StPierre@Eng.Sun.COM

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