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Versions: 01 02 03 04 05 06                                             
Service Location Working Group                           Pete St. Pierre
INTERNET DRAFT                                          Sun Microsystems
Expires 8 September 2000                                  Scott Isaccson
                                                                  Novell
                                                            Ira McDonald
                                                              High North
                                                            8 March 2000

          Definition of the Printer Abstract Service Type v2.0
               <draft-ietf-svrloc-printer-scheme-06.txt>

    Copyright (C) The Internet Society (2000). All Rights Reserved.


Status of This Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.  Internet-Drafts are working
   documents of the Internet Engineering Task Force (IETF), its areas,
   and its working groups.  Note that other groups may also distribute
   working documents as Internet-Drafts.

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

     The list of current Internet-Drafts can be accessed at
     http://www.ietf.org/ietf/1id-abstracts.txt

     The list of Internet-Draft Shadow Directories can be accessed at
     http://www.ietf.org/shadow.html.


Abstract

   This document is a product of the Service Location and Internet
   Printing Protocol Working Groups of the Internet Engineering Task
   Force (IETF).  Comments should be sent to the srvloc@srvloc.org and
   ipp@pwg.org mailing lists.

   This document defines the 'service:printer:' abstract type and the
   attributes associated with it.  This 'service:printer:' template is
   designed to be used in conjunction with the Service Location
   Protocol, Version 2 (SLPv2) [13], but may be used with any directory
   service which supports attribute/value pair registration, such as the
   Lightweight Directory Access Protocol, Version 3 (LDAPv3 [16]).

   The 'service:printer:' type is specified as an abstract service type.
   Printers advertised with the 'service:printer:' abstract type may be
   accessible by one or more print protocols, such as IPP [3] and LPR
   [2].




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                           Table of Contents

1.  Introduction ...............................................       3
2.  Terminology ................................................       3
3.  Template url-path Definition ...............................       4
  3.1.  IPP ....................................................       4
  3.2.  LPR ....................................................       4
4.  Printer Service Template ...................................       5
5.  Summary of Required Attributes .............................      16
  5.1.  Rationale for Required Attributes ......................      16
6.  Summary of Recommended Attributes ..........................      17
  6.1.  Rationale for Recommended Attributes ...................      17
7.  Summary of Optional Attributes .............................      18
  7.1.  Rationale for Optional Attributes ......................      19
8.  Summary of Attribute Origins ...............................      20
9.  IANA Considerations ........................................      21
10.  Internationalization Considerations .......................      21
11.  Security Considerations ...................................      21
12.  References ................................................      22
13.  Acknowledgments ...........................................      24
14.  Authors' Addresses ........................................      24
15.  Full Copyright Statement ..................................      25





























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1.  Introduction

   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 an abstract service type that includes concrete
   types such as the printing protocol defined in RFC 1179 [2], "Line
   Printer Daemon Protocol".  This template defines the
   'service:printer:' abstract type.

   The 'service:printer:' abstract type supports consistent registration
   of printer services.  The attributes described within this document
   are derived from previous specifications developed by the IETF IPP WG
   and IETF Printer MIB WG.

   The attributes specified are intended to facilitate both automatic
   and manual selection of services, not to provide service state,
   statistics, or notification.  The target audience of service
   attributes consists of users, either software agents or end users.



2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [14].
























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3.  Template url-path Definition

   The 'service:printer:' type is an abstract type.  Because an abstract
   service type may contain one of many concrete types, the 'url-path'
   associated with a 'service:printer:' URL may vary.  IPP and LPR
   printers are presently supported by this 'service:printer:' template.
   Other printer protocols MAY be supported by extension templates or by
   future updates of this abstract 'service:printer:' template.



3.1.  IPP

   An IPP Printer object is defined in "IPP/1.1 Model and Semantics"
   [3].  An IPP printer concrete URL is defined in "IPP/1.1 Encoding and
   Transport" [9].

   Examples of valid 'service:' URLs for IPP printers include:

   service:printer:ipp://server.sun.com/cgi-bin/public-printer
   service:printer:ipp://foo.sun.com/printers?public-printer



3.2.  LPR

   An LPR accessible printer MAY include a queue name as the last part
   of the URL.  If the queue name is absent, the print server is assumed
   to use a default print queue.  The definition of an LPR printer
   concrete URL is specified in this document, in the 'service:printer:'
   template.

   Examples of valid 'service:' URLs for LPR printers include:

   service:printer:lpr://server.sun.com
   service:printer:lpr://server.sun.com/public-printer














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4.  Printer Service Template

   The 'service:printer:' template defined below conforms to the grammar
   described in "Service Templates and service: Schemes".  Please refer
   to [4] for detailed explanation of the syntax.

   Name of submitters: Pete St. Pierre <Pete.StPierre@eng.sun.com>
                       Scott Isaacson <sisaacson@novell.com>
                       Ira McDonald <imcdonald@sharplabs.com>

   Language of service template: en (English)

   Security Considerations:
      By advertising the security methods for each supported printer URL
      the printer may expose information useful to attackers.  SLPv2
      security or another security method SHOULD be used to authenticate
      any service advertisements.

   Template Text:
   -------------------- template begins here --------------------
        template-type = printer

        template-version = 2.0

        template-description =
            The 'service:printer:' template describes the attributes
            supported by network printing devices.  Devices may be
            either directly connected to a network or managed by a
            print server.  The device or server understands one or
            more network print protocols such as IPP or LPR.

        template-url-syntax =
            url-path    = ippurl / lprurl
            ippurl      = IPP URL as defined in [9]
            lprurl      = "lpr://" hostport [ "/" qname ]
            hostport    = host [ ":" port ]
            host        = hostname / hostnumber
            hostname    = *( domainlabel "." ) toplabel
            domainlabel = alphanum /
                          alphanum * [alphanum / "-"] alphanum
            toplabel    = alpha / alpha * [alphanum / "-"] alphanum
            hostnumber  = ipv4-number / ipv6-number
            ipv4-number = 1*3digit 3*3("." 1*3digit)
            ipv6-number = 32*hex
            3digit      = digit digit digit
            port        = 1*digit
            alphanum    = alpha / digit
            alpha       = "a" / "b" / "c" / "d" / "e" / "f" / "g" /
                          "h" / "i" / "j" / "k" / "l" / "m" / "n" /

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                          "o" / "p" / "q" / "r" / "s" / "t" / "u" /
                          "v" / "w" / "x" / "y" / "z" /
                          "A" / "B" / "C" / "D" / "E" / "F" / "G" /
                          "H" / "I" / "J" / "K" / "L" / "M" / "N" /
                          "O" / "P" / "Q" / "R" / "S" / "T" / "U" /
                          "V" / "W" / "X" / "Y" / "Z"
            digit       = "0" / "1" / "2" / "3" / "4" / "5" / "6" /
                          "7" / "8" / "9"

        printer-xri-supported = STRING L
            # REQUIRED for all registrations by conforming SLP SAs
            # IPP 'printer-uri-supported'
            # IPP 'uri-authentication-supported'
            # IPP 'uri-authentication-supported'
            # The unordered list of XRI (extended resource identifiers)
            # supported by this printer.  Each member of the list
            # consists of a URI (uniform resource identifier) followed
            # by optional authentication and security metaparameters.
            # The keywords for URI and their metaparameters are:
            #   'uri'  == IPP 'printer-uri-supported' value
            #   'auth' == IPP 'uri-authentication-supported' value
            #   'sec'  == IPP 'uri-security-supported' value
            # Legal values of the 'auth' metaparameter include
            #   'none' (no authentication for this URI)
            #   'requesting-user-name' (from operation request)
            #   'basic' (HTTP/1.1 Basic, RFC 2617 [18])
            #   'digest' (HTTP/1.1 Basic, RFC 2617 [18])
            #   'certificate' (from certificate)
            # per IPP Model [3] (extensions MAY also be used).
            # A missing 'auth' metaparameter SHALL mean 'none'.
            # Legal values of the 'sec' metaparameter include
            #   'none' (no security for this URI)
            #   'ssl3' (Netscape SSL3)
            #   'tls' (IETF TLS/1.0, RFC 2246 [15])
            # per IPP Model [3] (extensions MAY also be used).
            # A missing 'sec' metaparameter SHALL mean 'none'.
            # Each metaparameter of a list member is delimited by '<'.
            # Each list member (including the last) is delimited by '>'.
            # For example:
            #   'uri=ipp://foo.com< auth=digest< sec=tls< >
            #   'uri=lpr://bar.com< auth=none< sec=none< >
            # Registrations MAY consolidate values for metaparameters,
            # as in the following example:
            #   'uri=ipp://foo.com< auth=basic,digest< sec=tls,ssl3< >

        printer-name = STRING
            # REQUIRED for all registrations by conforming SLP SAs
            # IPP 'printer-name'
            # The site-specific administrative name of this printer.
            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'

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            # (although the printer's name may be in any language).
            # This name MAY be the last part of the printer's URI or it
            # MAY be completely unrelated.
            # This name MAY contain characters that are not allowed in a
            # conventional URI (which conforms to RFC 2396 [17]).
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-natural-language-configured = STRING L O
            unknown
            # RECOMMENDED for all registrations by conforming SLP SAs
            # IPP 'natural-language-configured'
            # The configured language in which error and status messages
            # will be generated (by default) by this printer.
            # Also, the (declared) language of the attributes
            # 'printer-name', 'printer-location', 'printer-info',
            # 'printer-make-and-model', 'printer-media-local-supported',
            # 'printer-current-operator', 'printer-service-person'.
            # For example:
            #   'en-us' (US English) or 'fr-fr' (French in France)
            # Legal values of language tags conform to RFC 1766
            # 'Tags for the Identification of Languages' [5].
            # For coherence with IPP Model [3], language tags in this
            # attribute SHALL be lowercase normalized.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            # However, it is STRONGLY RECOMMENDED that this attribute
            # be supported and that it be set to a meaningful value.

        printer-location = STRING O
            unknown
            # RECOMMENDED for all registrations by conforming SLP SAs
            # IPP 'printer-location'
            # The physical location of this printer.
            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'.
            # A free form description of this printer's physical
            # location, for example:
            #   'Orlando office, 2nd floor, near the fire escape'
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            # However, it is STRONGLY RECOMMENDED that this attribute
            # be supported and that it be set to a meaningful value so
            # that users can determine this printer's physical location
            # for printer selection (before print job submission) and
            # for output collection (after print job completion).

        printer-info = STRING O
            unknown
            # IPP 'printer-info'
            # Additional descriptive information on this printer.

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            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'.
            # A free form string that may contain any site-specific
            # descriptive information about this printer.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-more-info = STRING L O
            unknown
            # IPP 'printer-more-info'
            # A URI used to obtain more information about this specific
            # printer.  For example, this could be an 'http:' URI
            # referencing an HTML page accessible to a Web Browser.
            # The information obtained from this URI is intended for
            # end user consumption.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-make-and-model = STRING O
            unknown
            # IPP 'printer-make-and-model'
            # The manufacturer, make, and model of this printer,
            # a simple text string defined by the manufacturer.
            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-ipp-versions-supported = STRING L M O
            none
            # IPP 'ipp-versions-supported'
            # The unordered list of 'major.minor' IPP versions
            # supported by this printer or 'none'.
            # For example:
            #   '1.0, 1.1'
            # Legal values include 'none', '1.0', and '1.1',
            # per IPP Model [3] (extensions MAY also be used).
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'none'.

        printer-multiple-document-jobs-supported = STRING L O
            unknown
            # IPP 'multiple-document-jobs-supported'
            # Indicates whether this printer supports more than one
            # document per job.
            # This template attribute is an extended boolean.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            unknown, true, false

        printer-charset-configured = STRING L O

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            utf-8
            # IPP 'charset-configured'
            # The configured charset in which error and status messages
            # will be generated (by default) by this printer.
            # For example:
            #   'utf-8' (ISO 10646/Unicode) or 'iso-8859-1' (Latin1)
            # Legal values of charset tags (names/aliases) come from
            # the IANA Registry of Coded Character Sets [6] and
            # the '(preferred MIME name)' SHALL be used as the tag.
            # For coherence with IPP Model [3], charset tags in this
            # attribute SHALL be lowercase normalized.

        printer-charset-supported = STRING L M O
            utf-8
            # IPP 'charset-supported'
            # The possible charsets in which error and status messages
            # may be generated (if requested) by this printer.
            # Also, the possible charsets for printer string attributes
            # set by operator, system administrator, or manufacturer.
            # For example:
            #   'utf-8' (ISO 10646/Unicode) or 'iso-8859-1' (Latin1)
            # Legal values of charset tags (names/aliases) come from
            # the IANA Registry of Coded Character Sets [6] and
            # the '(preferred MIME name)' SHALL be used as the tag.
            # This attribute SHALL include the value 'utf-8', per
            # RFC 2277, 'IETF Policy on Charsets and Languages' [12].
            # For coherence with IPP Model [3], charset tags in this
            # attribute SHALL be lowercase normalized.

        printer-generated-natural-language-supported = STRING L M O
            unknown
            # RECOMMENDED for all registrations by conforming SLP SAs
            # IPP 'generated-natural-language-supported'
            # The possible languages in which error and status messages
            # may be generated (if requested) by this printer.
            # Also, the possible languages for printer string attributes
            # set by operator, system administrator, or manufacturer.
            # For example:
            #   'en-us' (US English) or 'fr-fr' (French in France)
            # Legal values of language tags conform to RFC 1766
            # 'Tags for the Identification of Languages' [5].
            # For coherence with IPP Model [3], language tags in this
            # attribute SHALL be lowercase normalized.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            # However, it is STRONGLY RECOMMENDED that this attribute
            # be supported and that it be set to a meaningful value.

        printer-document-format-supported = STRING L M O
            unknown
            # RECOMMENDED for all registrations by conforming SLP SAs

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            # IPP 'document-format-supported'
            # The possible document formats in which data may be
            # interpreted and printed by this printer.
            # Legal values of document formats (MIME types) come from
            # the IANA Registry of Internet Media Types [11].
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            # However, it is STRONGLY RECOMMENDED that this attribute
            # be supported and that it be set to a meaningful value.

        printer-color-supported = STRING L O
            unknown
            # IPP 'color-supported'
            # Indicates whether this printer is capable of any type of
            # color printing at all, including highlight color.
            # This template attribute is an extended boolean.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            unknown, true, false

        printer-compression-supported = STRING L M O
            none
            # RECOMMENDED for all registrations by conforming SLP SAs
            # IPP 'compression-supported'
            # The unordered list of compression algorithms supported
            # by this printer.
            # For example:
            #   'deflate, gzip'
            # Legal values include
            #   'none'
            #   'deflate' (public domain ZIP)
            #   'gzip' (GNU ZIP)
            #   'compress' (UNIX)
            # per IPP Model [3] (extensions MAY also be used).
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'none'.
            # However, it is STRONGLY RECOMMENDED that this attribute
            # be supported and that it be set to a meaningful value.

        printer-pages-per-minute = INTEGER O
            -1
            # IPP 'pages-per-minute'
            # The nominal number of pages per minute which may be
            # output by this printer (e.g., simplex, black-and-white).
            # This attribute is informative, NOT a service guarantee.
            # Typically, it is the value used in marketing literature
            # to describe this printer.
            # A value of '-1' indicates unknown.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to '-1'.


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        printer-pages-per-minute-color = INTEGER O
            -1
            # IPP 'pages-per-minute-color'
            # The nominal number of color pages per minute which may be
            # output by this printer (e.g., simplex, color).
            # This attribute is informative, NOT a service guarantee.
            # Typically, it is the value used in marketing literature
            # to describe this printer.
            # A value of '-1' indicates unknown.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to '-1'.

        printer-finishings-supported = STRING L M O
            none
            # IPP 'finishings-supported'
            # The possible finishing operations supported by this
            # printer.
            # Legal values of finishings are defined in IPP Model [3].
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'none'.
            none, staple, punch, cover, bind,
            saddle-stitch, edge-stitch,
            staple-top-left, staple-bottom-left,
            staple-top-right, staple-bottom-right,
            edge-stitch-left, edge-stitch-top,
            edge-stitch-right, edge-stitch-bottom,
            staple-dual-left, staple-dual-top,
            staple-dual-right, staple-dual-bottom

        printer-number-up-supported = INTEGER M O
            1
            # IPP 'number-up-supported'
            # The possible numbers of print-stream pages to impose
            # upon a single side of an instance of a selected
            # medium.
            # Legal values of this attribute include 1, 2, and 4 [3].
            # Implementations may support other values.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to '1'.

        printer-sides-supported = STRING L M O
            one-sided
            # IPP 'sides-supported'
            # (Compare with Salutation 'duplex-mode')
            # The number of impression sides (one or two) and the
            # two-sided impression rotations supported by this printer.
            # Salutation 'simplex' == IPP 'one-sided'
            # Salutation 'duplex' == IPP 'two-sided-long-edge'
            # Salutation 'tumble' == IPP 'two-sided-short-edge'
            # If this printer information is not known to the SLP SA,

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            # then this attribute SHALL be set to 'one-sided'.
            one-sided, two-sided-long-edge, two-sided-short-edge

        printer-media-supported = STRING L M O
            unknown
            # IPP 'media-supported' - only the standard keyword values
            # The standard names/types/sizes (and optional color
            # suffixes) of the media supported by this printer.
            # The values specified are NOT localized according to
            # 'printer-natural-language-configured', but are in a
            # fixed language of 'en-us' (US English).  For example:
            #   'iso-a4' or 'envelope' or 'na-letter-white'
            # Legal values of this attribute conform to ISO 10175
            # 'Document Printing Application (DPA)' [10] and
            # any IANA registered extensions, per IPP Model [3].
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-media-local-supported = STRING M O
            unknown
            # IPP 'media-supported' - only site-specific name values
            # Site-specific names of media supported by this printer.
            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'
            # (although the media names may be in any language).
            # For example:
            #   'purchasing-form' (site-specific name)
            # as opposed to (in 'media-supported' above):
            #   'na-letter' (standard keyword from ISO 10175 [10]).
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-resolution-supported = STRING L M O
            unknown
            # IPP 'printer-resolution-supported'
            # (Compare with 'printer-xri-supported' in this template)
            # The unordered list of resolutions supported for printing
            # documents by this printer.
            # Each resolution supported is a string with 3 fields:
            # 1) Crossfeed direction resolution (positive integer)
            # 2) Feed direction resolution (positive integer)
            # 3) Resolution unit (enumerated value - see below)
            # Each resolution field is delimited by '>', for example:
            #   '300> 300> dpi>, 600> 600> dpi>'
            # Legal values of resolution unit are
            #   'dpi' (dots per inch)
            #   'dpcm' (dots per centimeter)
            # per IPP Model [3] (extensions SHOULD NOT be used).
            # This attribute is derived from the Printer MIB [7].
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

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        printer-print-quality-supported = STRING L M O
            unknown
            # IPP 'print-quality-supported'
            # The unordered list of print qualities supported for
            # printing documents on this printer.
            # For example:
            #   'draft, normal'
            # Legal values are defined in IPP Model [3].
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            unknown, draft, normal, high

        printer-job-priority-supported = INTEGER O
            1
            # IPP 'job-priority-supported'
            # (Compare with Salutation 'priority-levels-supported')
            # Indicates the number of job priority levels supported.
            # An IPP conformant printer which supports job priority
            # must always support a full range of priorities from
            # '1' to '100' (to ensure consistent behavior), therefore
            # this template attribute describes the 'granularity'.
            # Legal values of this attribute are from '1' to '100'.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to '1'.

        printer-copies-supported = INTEGER O
            -1
            # IPP 'copies-supported'
            # The maximum number of copies of a document
            # that may be printed as a single job.
            # A value of '0' indicates no maximum limit.
            # A value of '-1' indicates unknown.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to '-1'.

        printer-job-k-octets-supported = INTEGER O
            -1
            # IPP 'job-k-octets-supported'
            # The maximum size in kilobytes (1,024 octets actually)
            # incoming print job that this printer will accept.
            # A value of '0' indicates no maximum limit.
            # A value of '-1' indicates unknown.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to '-1'.

        printer-current-operator = STRING M O
            unknown
            # Printer MIB 'prtGeneralCurrentOperator'
            # The name of the current human operator responsible for
            # operating this printer.  It is suggested that this string

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            # include information that would enable other humans to
            # reach the operator, such as a telephone number.
            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'
            # (although the person's name may be in any language).
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-service-person = STRING M O
            unknown
            # Printer MIB 'prtGeneralServicePerson'
            # The name of the current service person responsible for
            # servicing this printer.  It is suggested that this string
            # include information that would enable other humans to
            # reach the service person, such as a telephone number.
            # This value of this attribute SHOULD be in the language
            # specified in 'printer-natural-language-configured'
            # (although the person's name may be in any language).
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

        printer-delivery-orientation-supported = STRING L M O
            unknown
            # Printer MIB 'prtOutputPageDeliveryOrientation'
            # The possible delivery orientations of pages as they are
            # printed and ejected from this printer.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            unknown, face-up, face-down

        printer-stacking-order-supported = STRING L M O
            unknown
            # Printer MIB 'prtOutputStackingOrder'
            # (Compare with Salutation 'paper-output')
            # The possible stacking order of pages as they are printed
            # and ejected from this printer.
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.
            unknown, first-to-last, last-to-first

        printer-output-features-supported = STRING L M O
            unknown
            # Printer MIB 'prtOutputFeaturesGroup'
            # (Compare with Salutation 'paper-output')
            # The possible output features supported by this printer.
            # 'bursting' == Printer MIB 'prtOutputBursting'
            # 'decollating' == Printer MIB 'prtOutputDecollating'
            # 'page-collating' == Printer MIB 'prtOutputPageCollated'
            # 'offset-stacking' == Printer MIB 'prtOutputOffestStacking'
            # If this printer information is not known to the SLP SA,
            # then this attribute SHALL be set to 'unknown'.

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            unknown, bursting, decollating, page-collating,
            offset-stacking

   -------------------- template ends here ----------------------
















































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5.  Summary of Required Attributes

   Attributes are associated with 'service:' URLs in order to provide a
   dynamic search capability to service location clients.  SLP SAs
   SHOULD include OPTIONAL attributes in their service registrations.

   Two (2) of the attributes defined in 'service:printer:' are REQUIRED
   in all compliant service registrations by SLP SAs:

   SLP Required Attribute                              IPP Generic Schem
   ----------------------                              -----------------
   printer-xri-supported                               r
   printer-name                                        r

   r   RECOMMENDED - Appendix E 'Generic Directory Schema' IPP Model [3]
       REQUIRED - SLP 'service:printer:' template
   m   Missing - Appendix E 'Generic Directory Schema' IPP Model [3]
       REQUIRED - SLP 'service:printer:' template



5.1.  Rationale for Required Attributes

   'printer-xri-supported'
   - REQUIRED in SLP 'service:printer:' to consolidate values from the
   following three IPP attributes (without parallel ordered attributes):
   'printer-uri-supported', 'uri-authentication-supported', and
   'uri-security-supported'.

   All other REQUIRED SLP 'service:printer:' template attributes are
   RECOMMENDED in Appendix E 'Generic Directory Schema' IPP Model [3].



















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6.  Summary of Recommended Attributes

   Attributes are associated with 'service:' URLs in order to provide a
   dynamic search capability to service location clients.  SLP SAs
   SHOULD include RECOMMENDED attributes in their service registrations.

   Some of the attributes defined in 'service:printer:' are RECOMMENDED
   in all compliant service registrations by SLP SAs:

   SLP Recommended Attribute                           IPP Generic Schem
   -------------------------                           -----------------
   printer-location                                    o
   printer-natural-language-configured                 m
   printer-generated-natural-language-supported        o
   printer-document-format-supported                   r
   printer-compression-supported                       r

   r   RECOMMENDED - Appendix E 'Generic Directory Schema' IPP Model [3]
       OPTIONAL - SLP 'service:printer:'' template (with specified defau
   o   OPTIONAL - Appendix E 'Generic Directory Schema' IPP Model [3]
       OPTIONAL - SLP 'service:printer:'' template (with specified defau
   m   Missing - Appendix E 'Generic Directory Schema' IPP Model [3]
       OPTIONAL - SLP 'service:printer:'' template (with specified defau



6.1.  Rationale for Recommended Attributes

   'printer-location'
   - RECOMMENDED in SLP 'service:printer:' template to aid users in
   selecting appropriate printers (by physical proximity);
   - OPTIONAL in Appendix E 'Generic Directory Schema' of IPP Model [3].

   'printer-natural-language-configured'
   - RECOMMENDED in SLP 'service:printer:' template to specify language
   tags for 'printer-name', 'printer-location', 'printer-info',
   'printer-make-and-model', 'printer-media-local-supported',
   'printer-current-operator', and 'printer-service-person' attributes;
   - missing in Appendix E 'Generic Directory Schema' of IPP Model [3],
   because the corresponding IPP attributes are language tagged in-band
   via the IPP 'textWithLanguage' syntax.

   'printer-generated-natural-language-supported'
   - RECOMMENDED in SLP 'service:printer:' template to aid users in
   selecting appropriate printers;
   - OPTIONAL in Appendix E 'Generic Directory Schema' of IPP Model [3].

   All other RECOMMENDED SLP 'service:printer:' template attributes are
   RECOMMENDED in Appendix E 'Generic Directory Schema' IPP Model [3].

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7.  Summary of Optional Attributes

   Attributes are associated with 'service:' URLs in order to provide a
   dynamic search capability to service location clients.  SLP SAs MAY
   include OPTIONAL attributes in their service registrations.

   Most of the attributes defined in 'service:printer:' are OPTIONAL in
   all compliant service registrations by SLP SAs:

   SLP Optional Attribute                              IPP Generic Schem
   ----------------------                              -----------------
   printer-info                                        o
   printer-more-info                                   o
   printer-make-and-model                              r
   printer-ipp-versions-supported                      r
   printer-multiple-document-jobs-supported            o
   printer-charset-configured                          m (SLP enhancemen
   printer-charset-supported                           o
   printer-color-supported                             r
   printer-finishings-supported                        r
   printer-number-up-supported                         o
   printer-sides-supported                             r
   printer-media-supported                             r
   printer-media-local-supported                       r (site-specific)
   printer-pages-per-minute                            o
   printer-pages-per-minute-color                      o
   printer-resolution-supported                        o
   printer-print-quality-supported                     o
   printer-job-priority-supported                      m (SLP enhancemen
   printer-copies-supported                            m (SLP enhancemen
   printer-job-k-octets-supported                      m (SLP enhancemen
   printer-current-operator                            m (from Printer M
   printer-service-person                              m (from Printer M
   printer-delivery-orientation-supported              m (from Printer M
   printer-stacking-order-supported                    m (from Printer M
   printer-output-features-supported                   m (from Printer M

   r   RECOMMENDED - Appendix E 'Generic Directory Schema' IPP Model [3]
       OPTIONAL - SLP 'service:printer:'' template (with specified defau
   o   OPTIONAL - Appendix E 'Generic Directory Schema' IPP Model [3]
       OPTIONAL - SLP 'service:printer:'' template (with specified defau
   m   Missing - Appendix E 'Generic Directory Schema' IPP Model [3]
       OPTIONAL - SLP 'service:printer:'' template (with specified defau







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7.1.  Rationale for Optional Attributes

   'printer-location', 'printer-make-and-model',
   'printer-color-supported', 'printer-finishings-supported',
   'printer-sides-supported', 'printer-media-supported', and
   'printer-media-local-supported'
   - OPTIONAL in SLP 'service:printer:' template because network print
   servers may not be able to determine this information;
   - RECOMMENDED in Appendix E 'Generic Directory Schema' of IPP Model
   [3].

   'printer-ipp-versions-supported'
   - OPTIONAL in SLP 'service:printer:' template because network
   printers may not support IPP;
   - RECOMMENDED in Appendix E 'Generic Directory Schema' of IPP Model
   [3].

   'printer-charset-configured'
   - OPTIONAL in SLP 'service:printer:'' template to aid users in
   selecting appropriate printers;
   - missing in Appendix E 'Generic Directory Schema' of IPP Model [3].

   'printer-job-priority-supported', 'printer-copies-supported', and
   'printer-job-k-octets-supported'
   - OPTIONAL in SLP 'service:printer:'' template to aid users in
   selecting appropriate printers;
   - missing in Appendix E 'Generic Directory Schema' of IPP Model [3].

   'printer-current-operator', 'printer-service-person',
   'printer-delivery-orientation-supported',
   'printer-stacking-order-supported', and
   'printer-output-features-supported'
   - OPTIONAL in SLP 'service:printer:'' template to aid users in
   selecting appropriate printers;
   - missing in Appendix E 'Generic Directory Schema' of IPP Model [3],
   because they are only specified in the Printer MIB [7], not in IPP.

   All other OPTIONAL SLP 'service:printer:' template attributes are
   also OPTIONAL in Appendix E 'Generic Directory Schema' IPP Model [3].











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8.  Summary of Attribute Origins

   The following table summarizes the origins of all of the attributes
   in the 'service:printer:' template (except 'template-xxx' generic
   attributes defined in "Service Templates and service: Schemes" [4]
   and required for all 'service:' templates).  The two source documents
   are IPP Model [3] and Printer MIB [7].

   Attribute Name                                  IPP     Printer MIB
   --------------                                  ---     -----------
   printer-xri-supported                           X
   printer-name                                    X
   printer-natural-language-configured             X
   printer-location                                X
   printer-info                                    X
   printer-more-info                               X
   printer-make-and-model                          X
   printer-ipp-versions-supported                  X
   printer-multiple-document-jobs-supported        X
   printer-charset-configured                      X
   printer-charset-supported                       X
   printer-generated-natural-language-supported    X
   printer-document-format-supported               X
   printer-color-supported                         X
   printer-compression-supported                   X
   printer-pages-per-minute                        X
   printer-pages-per-minute-color                  X
   printer-finishings-supported                    X
   printer-number-up-supported                     X
   printer-sides-supported                         X
   printer-media-supported                         X
   printer-media-local-supported                   X
   printer-resolution-supported                    X
   printer-print-quality-supported                 X
   printer-job-priority-supported                  X
   printer-copies-supported                        X
   printer-job-k-octets-supported                  X
   printer-current-operator                                X
   printer-service-person                                  X
   delivery-orientation-supported                          X
   stacking-order-supported                                X
   output-features-supported                               X

   'printer-xri-supported'
   - REQUIRED in SLP 'service:printer:' to consolidate values from the
   following three IPP attributes (without parallel ordered attributes):
   'printer-uri-supported', 'uri-authentication-supported', and
   'uri-security-supported'.


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9.  IANA Considerations

   Registration of this 'service:printer:' template will follow the
   procedures defined in section 4 'A Procedure for Standardizing New
   Service Types' and section 5 'IANA Considerations' of "Service
   Templates and service: Schemes" [4].



10.  Internationalization Considerations

   All attribute values in registrations using the 'service:printer:'
   template MUST be encoded in UTF-8 characters, as required by "Service
   Location Protocol, Version 2" [13].  Also, a language tag for all of
   the textual attributes in the 'service:printer:' template SHOULD be
   supplied in the attribute 'printer-natural-language-configured'.
   Therefore, all registrations using the 'service:printer:' template
   conform to "IETF Policy on Character Sets and Languages" [12].



11.  Security Considerations

   When used with SLPv2, this 'service:printer:' template inherits all
   of the security issues described in section 17 'Security
   Considerations' of "Service Location Protocol, Version 2" [13].

   By advertising the security methods for each supported printer URL
   the printer may expose information useful to attackers.  SLPv2
   security or another security method SHOULD be used to authenticate
   any service advertisements.



















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12.  References

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

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

   [3] R. deBry, T. Hastings, R. Herriot, S. Isaacson, P. Powell.
   IPP/1.1:  Model and Semantics, <draft-ietf-ipp-model-v11-06.txt>
   (work in progress), March 2000.

   [4] E. Guttman, C. Perkins, J. Kempf.  Service Templates and service:
   Schemes, RFC 2609, June 1999.  (Updates RFC 2165)

   [5] H. Alvestrand.  Tags for the Identification of Languages, RFC
   1766.  March 1995.

   [6] IANA Registry of Coded Character Sets:
   ftp://ftp.isi.edu/in-notes/iana/assignments/character-sets.

   [7] R. Smith, F. Wright, T. Hastings, S. Zilles, J. Gyllenskog.
   Printer MIB, RFC 1759, March 1995.

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

   [9] R. Herriot, S. Butler, P. Moore, R. Turner.  IPP/1.1:  Encoding
   and Transport, <draft-ietf-ipp-protocol-v11-05.txt> (work in
   progress), March 2000.

   [10] Information Technology - Document Printing Application (DPA),
   ISO/IEC 10175, June 1996.

   [11] IANA Registry of Internet Media Types (also called MIME types):
   ftp://ftp.isi.edu/in-notes/iana/assignments/media-types

   [12] H. Alvestrand.  IETF Policy on Character Sets and Languages, RFC
   2277, January 1998.

   [13] E. Guttman, C. Perkins, J. Veizades, M. Day.  Service Location
   Protocol, Version 2, RFC 2608, June 1999.  (Updates RFC 2165)

   [14] S. Bradner.  Key words for use in RFCs to Indicate Requirement
   Levels, RFC 2119, March 1997.

   [15] T. Dierks, C. Allen.  TLS Protocol Version 1.0, RFC 2246,
   January 1999.


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   [16] M. Wahl, T. Howes, S. Kille.  Lightweight Directory Access
   Protocol Version 3, RFC 2251, December 1997.

   [17] T. Berners-Lee, R. Fielding, L. Masinter.  URI Generic Syntax,
   RFC 2396, August 1998.

   [18] J. Franks, P. Hallam-Baker, J. Hostetler, S. Lawrence, P. Leach,
   A. Luotonen, L. Stewart.  HTTP Authentication: Basic and Digest
   Access Authentication, RFC 2617, June 1999.










































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13.  Acknowledgments

   This document is a product of the Service Location and Internet
   Printing Protocol Working Groups of the Internet Engineering Task
   Force (IETF).  Comments should be sent to the srvloc@srvloc.org and
   ipp@pwg.org mailing lists.

   Thanks to Jean Beha (Xerox), Jim Erwin (Novell), Pat Fleming (IBM),
   Tom Hastings (Xerox), Bob Herriot (Xerox), Ken Jones (Sun), James
   Kempf (Sun), Harry Lewis (IBM), Hugo Parra (Novell), Todd Rupper
   (Novell), and Randy Turner (formerly Sharp).

   Appendix E 'Generic Directory Schema' in IPP/1.1 Model [3]
   (recommended and optional attributes for registering IPP printers)
   was the primary input to this 'service:printer:' template.



14.  Authors' Addresses

   Questions about this memo can be directed to:

   Pete St. Pierre
   Sun Microsystems
   901 San Antonio Avenue
   Palo Alto, CA 94043
   USA
   Phone: 650-786-5790
   EMail: Pete.StPierre@eng.sun.com

   Scott Isaccson
   Novell
   122 E 1700 S
   Provo, UT 84606
   USA
   Phone: 801-861-7366
   EMail: sisaacson@novell.com

   Ira McDonald
   High North
   221 Ridge Ave
   Grand Marais, MI 49839
   USA
   Phone: 906-494-2434 (or 2697)
   Email: imcdonald@sharplabs.com





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15.  Full Copyright Statement

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

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























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