Service Location Working Group Pete St. Pierre
INTERNET DRAFT Sun Microsystems
Expires 31 July 2000 Scott Isaccson
Novell
Ira McDonald
High North
31 January 2000
Definition of the Printer Abstract Service Type
<draft-ietf-svrloc-printer-scheme-05.txt>
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,
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The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
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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 'printer:' abstract service type and the
attributes associated with it. This 'printer:' service 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, RFC 2251).
The 'printer:' service type is specified as an abstract service type.
Printers advertised with the 'printer:' abstract service 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 ............................. 15
5.1. Rationale for Required Attributes ...................... 15
6. Summary of Optional Attributes ............................. 16
6.1. Rationale for Optional Attributes ...................... 16
7. Summary of Attribute Origins ............................... 18
8. IANA Considerations ........................................ 19
9. Internationalization Considerations ........................ 19
10. Security Considerations ................................... 19
11. References ................................................ 20
12. Acknowledgments ........................................... 21
13. Authors' Addresses ........................................ 21
14. Full Copyright Statement .................................. 22
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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". The service type for this 'service:' URL
is 'printer:'.
The 'printer:' abstract service 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 'printer:' type is an abstract service type. Because an abstract
service type may contain one of many concrete types, the 'url-path'
associated with a 'printer:' service URL may vary. IPP and LPR
printers are presently supported by this 'printer:' template. Other
printer protocols MAY be supported by extension templates or by
future updates of this abstract '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 'printer:' service
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 'printer:' service 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 associated with each supported
printer URL via the mandatory attributes 'printer-uri-supported'
'uri-authentication-supported', and 'uri-security-supported', the
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 = 1.0
template-description =
The 'printer:' service 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
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alpha = "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" /
"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-uri-supported = STRING L
# REQUIRED for all registrations by conforming SLP SAs
# IPP 'printer-uri-supported'
# The ORDERED list of URI supported by this printer,
# correlated with 'uri-authentication-supported' values
# and correlated with 'uri-security-supported' values.
# Each list member (including the last) is delimited by '>'.
# For example:
# 'lpr://foo.com> ipp://bar.com>'
uri-authentication-supported = STRING L
# REQUIRED for all registrations by conforming SLP SAs
# IPP 'uri-authentication-supported'
# The ORDERED list of authentication supported for each URI
# specified in 'printer-uri-supported' for this printer.
# Each list member (including the last) is delimited by '>'.
# For example:
# 'none> basic> certificate>'
# (see example of 'printer-uri-supported' above).
# Legal values include
# 'none' (no authentication for this URI)
# 'requesting-user-name' (from operation request)
# 'basic' (HTTP/1.1 Basic, RFC 2617)
# 'digest' (HTTP/1.1 Basic, RFC 2617)
# 'certificate' (from certificate)
# per IPP Model [3] (extensions MAY also be used).
# URI that do not support authentication SHALL specify
# 'none'.
uri-security-supported = STRING L
# REQUIRED for all registrations by conforming SLP SAs
# IPP 'uri-security-supported'
# The ORDERED list of security supported for each URI
# specified in 'printer-uri-supported' for this printer.
# Each list member (including the last) is delimited by '>'.
# For example:
# 'none> tls>'
# (see example of 'printer-uri-supported' above).
# Legal values include
# 'none' (no security for this URI)
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# 'ssl3' (Netscape SSL3)
# 'tls' (IETF TLS/1.0, RFC 2246)
# per IPP Model [3] (extensions MAY also be used).
# URI that do not support security SHALL specify
# 'none'.
printer-name = STRING
# REQUIRED for all registrations by conforming SLP SAs
# IPP 'printer-name'
# The site-specific administrative name of this printer,
# in the language in 'natural-language-configured'.
# 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).
# If this printer information is not known to the SLP SA,
# then this attribute SHALL be set to 'unknown'.
# This attribute SHOULD be static (time of registration)
# and SHOULD NOT be dynamically refreshed (subsequently).
printer-location = STRING O
unknown
# IPP 'printer-location'
# The physical location of this printer,
# in the language in '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,
# in the language in '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
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# 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,
# in the language in 'natural-language-configured'.
# If this printer information is not known to the SLP SA,
# then this attribute SHALL be set to 'unknown'.
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'.
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
charset-configured = STRING L O
utf-8
# IPP 'charset-configured'
# The configured charset in which error and status messages
# will be generated (by default) by this printer.
# Also, a possible charset 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.
# For coherence with IPP Model [3], charset tags in this
# attribute SHALL be lowercase normalized.
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# This attribute SHOULD be static (time of registration)
# and SHOULD NOT be dynamically refreshed (subsequently).
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.
natural-language-configured = STRING L
# REQUIRED 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, a possible language for printer string attributes
# set by operator, system administrator, or manufacturer.
# Also, the (declared) language of the 'printer-name',
# 'printer-location', 'printer-info', and
# 'printer-make-and-model' attributes of this printer.
# 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.
# This attribute SHOULD be static (time of registration)
# and SHOULD NOT be dynamically refreshed (subsequently).
natural-language-supported = STRING L M
# REQUIRED 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
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# attribute SHALL be lowercase normalized.
document-format-supported = STRING L M
# REQUIRED for all registrations by conforming SLP SAs
# 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'.
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
compression-supported = STRING L M
# REQUIRED 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'.
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'.
pages-per-minute-color = INTEGER O
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-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'.
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
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'.
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,
# then this attribute SHALL be set to 'one-sided'.
one-sided, two-sided-long-edge, two-sided-short-edge
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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 the
# value of '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'.
media-local-supported = STRING M O
unknown
# IPP 'media-supported' - only site-specific name values
# Site-specific names of media supported by this printer,
# in the language in 'natural-language-configured'.
# 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-uri-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'.
print-quality-supported = STRING L M O
unknown
# IPP 'print-quality-supported'
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# 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
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'.
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'.
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
# include information that would enable other humans to
# reach the operator, such as a phone number.
# If this printer information is not known to the SLP SA,
# then this attribute SHALL be set to 'unknown'.
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# This attribute SHOULD be static (time of registration)
# and SHOULD NOT be dynamically refreshed (subsequently).
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 phone number.
# If this printer information is not known to the SLP SA,
# then this attribute SHALL be set to 'unknown'.
# This attribute SHOULD be static (time of registration)
# and SHOULD NOT be dynamically refreshed (subsequently).
delivery-orientation-supported = STRING L 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
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
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'.
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, not to burden
servers implementations during registrations.
A small subset (8) of the attributes defined in 'printer:' are
REQUIRED in all compliant service registrations by SLP SAs:
SLP Required Attribute IPP Generic Directory Schema
---------------------- ----------------------------
printer-uri-supported r
uri-authentication-supported r
uri-security-supported r
printer-name r
natural-language-configured m (SLP enhancement)
natural-language-supported o (SLP enhancement)
document-format-supported r
compression-supported r
r RECOMMENDED - Appendix E 'Generic Directory Schema' IPP Model [3]
REQUIRED - SLP 'printer:' template
o OPTIONAL - Appendix E 'Generic Directory Schema' IPP Model [3]
REQUIRED - SLP 'printer:' template
m Missing - Appendix E 'Generic Directory Schema' IPP Model [3]
REQUIRED - SLP 'printer:' template
5.1. Rationale for Required Attributes
'natural-language-configured'
- REQUIRED in SLP 'printer:' template to specify language tags for
'printer-name', 'printer-location', 'printer-info', and
'printer-make-and-model' 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.
'natural-language-supported'
- REQUIRED in SLP 'printer:' template to assist users in selecting
appropriate printers;
- missing in Appendix E 'Generic Directory Schema' of IPP Model [3].
All other REQUIRED SLP 'printer:' template attributes are RECOMMENDED
in Appendix E 'Generic Directory Schema' IPP Model [3].
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6. Summary of Optional Attributes
Many of the attributes defined in 'printer:' are OPTIONAL in all
compliant service registrations by SLP SAs:
SLP Optional Attribute IPP Generic Directory Schema
---------------------- ----------------------------
printer-location r
printer-info o
printer-more-info o
printer-make-and-model r
ipp-versions-supported r
multiple-document-jobs-supported o
charset-configured m (SLP enhancement)
charset-supported o
color-supported r
finishings-supported r
number-up-supported o
sides-supported r
media-supported r
media-local-supported m (part of 'media-supported')
pages-per-minute o
pages-per-minute-color o
printer-resolution-supported o
print-quality-supported o
job-priority-supported m (SLP enhancement)
copies-supported m (SLP enhancement)
job-k-octets-supported m (SLP enhancement)
printer-current-operator m (from Printer MIB)
printer-service-person m (from Printer MIB)
delivery-orientation-supported m (from Printer MIB)
stacking-order-supported m (from Printer MIB)
output-features-supported m (from Printer MIB)
r RECOMMENDED - Appendix E 'Generic Directory Schema' IPP Model [3]
OPTIONAL - SLP 'printer:' template (with specified default)
o OPTIONAL - Appendix E 'Generic Directory Schema' IPP Model [3]
OPTIONAL - SLP 'printer:' template (with specified default)
m Missing - Appendix E 'Generic Directory Schema' IPP Model [3]
OPTIONAL - SLP 'printer:' template (with specified default)
6.1. Rationale for Optional Attributes
'printer-location', 'printer-make-and-model', 'color-supported',
'finishings-supported', 'sides-supported', 'media-supported', and
'local-media-supported'
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- OPTIONAL in SLP '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].
'ipp-versions-supported'
- OPTIONAL in SLP 'printer:' template because network printers may
not support IPP;
- RECOMMENDED in Appendix E 'Generic Directory Schema' of IPP Model
[3].
'charset-configured'
- OPTIONAL in SLP 'printer:' template to assist users in selecting
appropriate printers;
- missing in Appendix E 'Generic Directory Schema' of IPP Model [3].
'job-priority-supported', 'copies-supported', and
'job-k-octets-supported'
- OPTIONAL in SLP 'printer:' template to assist users in selecting
appropriate printers;
- missing in Appendix E 'Generic Directory Schema' of IPP Model [3].
'printer-current-operator', 'printer-service-person',
'delivery-orientation-supported', 'stacking-order-supported', and
'output-features-supported'
- OPTIONAL in SLP 'printer:' template to assist 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 'printer:' template attributes are OPTIONAL in
Appendix E 'Generic Directory Schema' IPP Model [3].
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7. Summary of Attribute Origins
The following table summarizes the origins of all of the attributes
in the 'printer:' service template (except 'template-xxx' generic
attributes defined in "Service Templates and service: Schemes" [4]
and required for all 'service:' templates).
Attribute Name IPP[3] Printer MIB[7]
-------------- ------ --------------
printer-uri-supported X
uri-authentication-supported X
uri-security-supported X
printer-name X
printer-location X
printer-info X
printer-more-info X
printer-make-and-model X
ipp-versions-supported X
multiple-document-jobs-supported X
charset-configured X
charset-supported X
natural-language-configured X
natural-language-supported X
document-format-supported X
color-supported X
compression-supported X
pages-per-minute X
pages-per-minute-color X
finishings-supported X
number-up-supported X
sides-supported X
media-supported X
media-local-supported X
printer-resolution-supported X
print-quality-supported X
job-priority-supported X
copies-supported X
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
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8. IANA Considerations
Registration of this 'printer:' service 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].
9. Internationalization Considerations
All attribute values in registrations using this 'printer:' service
template MUST be encoded in UTF-8 characters, as required by "Service
Location Protocol, Version 2" [13]. Thus, all registrations using
this 'printer:' service template conform to "IETF Policy on Character
Sets and Languages" [12].
10. Security Considerations
When used with SLPv2, this 'printer:' service template inherits all
of the security issues described in section 17 'Security
Considerations' of "Service Location Protocol, Version 2" [13].
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11. 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-v11-04.txt>
(work in progress), June 1999.
[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-v11-03.txt> (work in
progress), June 1999.
[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.
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12. Acknowledgments
This document is a submission to the Service Location Working group.
Thanks to Jean Beha (Xerox), Jim Erwin (Novell), Tom Hastings
(Xerox), Bob Herriot (Xerox), James Kempf (Sun), 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 version of the 'printer:' service template.
13. 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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14. Full Copyright Statement
Copyright (C) The Internet Society (1999). 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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