Service Location Working Group Pete St. Pierre
INTERNET DRAFT Sun Microsystems
17 December 1997
Definition of printer: URLs for use with Service Location
draft-ietf-srvloc-printer-scheme-01.txt
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.
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Abstract
This document defines the printer service type and the 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
registration.
The printer service type is designed as an abstract service type. It
is expected that printers advertised with the printer type may be
accessible by one or more protocols. IPP and lpr are a two examples
of printing protocols that may be used to perform the actual printing
function.
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Contents
Status of This Memo i
Abstract i
1. Printer service: URL Scheme 1
2. urlpath Definition 1
2.1. IPP . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.2. lpr . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Printer Scheme Background 2
4. Printer Service Template 3
5. Summary of Required Attributes 8
6. Acknowledgments 8
A. Attribute Origins 9
B. References 9
1. Printer 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 an abstract 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.
2. urlpath Definition
The printer type is an abstract service type. Because an abstract
service type may contain one of many concrete types, the urlpath
associated with a printer URL may vary. Two types of printers that
are expected to be common in printer URLs are ipp and lpr.
2.1. IPP
An IPP printer uses the http protocol and the queue name for a
printer is inherent in the http URL. The definition of an IPP printer
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object is defined in section 2.1 of the IPP Model and Semantics
draft.[3] Using this definition, a Service URL for an IPP printer
would look like:
service:printer:http://server.sun.com/cgi-bin/public-printer
service:printer:http://www.sun.com/cgi-bin/printers?public-printer
2.2. lpr
An lpr accessible printer includes a queue name as the last part of
the URL. If a queue name is absent, the print server is assumed to
use a default print queue.
service:printer:lpr://server.sun.com
service:printer:lpr://server.sun.com/public-printer
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, whereas the
audience of MIB statistics are network managers.
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4. Printer Service Template
The printer template, as defined below, conforms to the grammar
described in "Service Templates and service: Schemes". Please refer
to [4] for detailed explaination of the syntax.
-------------------- template begins here --------------------
type = printer
version = 0.0
language = en
description =
The printer service template describes the attributes
supported by network printing devices. Devices may be either
directly connected to a network, or connected to a printer
spooler that understands the a network queuing protocol such as
IPP, lpr or the Salutation Architecture.
url-syntax =
url-path = ippurl / lprurl
ippurl = url as defined in [3]
lprurl = "lpr://" hostport [ "/" qname ]
hostport = host [ ":" port ]
host = hostname / hostnumber
hostname = *( domainlavel "." ) 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" /
"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"
name = STRING
# This attribute contains the name of the printer. It is a
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# name that is more user friendly than the printer-URI.
# An administrator determines a printer's name and sets this
# attribute to that name. This name may be the last part of
# the printer's URI or it may be unrelated. In non-US-English
# locales, a name may contain characters that are not allowed
# in a URI.
description = STRING
# A free form string that can contain any site-specific
# descriptive information about this printer.
printer-info = STRING L O
# A URI used to obtain more information about
# this specific printer. For example, this could
# be an HTTP type URI referencing an HTML page accessible
# to a Web Browser. The information obtained from this
# URI is intended for end user consumption. Features
# outside the scope of IPP can be accessed from this URI.
protocols = STRING L M
# The names of the concrete protocol types supported
# by the printer abstract service type. Example values
# include http and lpr
make-model = STRING L O
# A simple text string defined by the manufacturer
# 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 O
# A free form description of this printer's physical
# location For example: "2nd floor, near the fire escape"
location-address = STRING O
# Physical/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
operator = STRING L M O
# A person, or persons responsible for maintaining a
# printer on a day-to-day basis.
duplex-mode = STRING M O
simplex
# The duplex capabilities a printer can handle.
simplex, duplex, tumble
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priority-queue = BOOLEAN O
FALSE
# The printer or print queue is a priority queuing device.
fonts-supported = STRING L M O
# A list of fonts that are supported by the printer.
number-up = INTEGER O
1
# Specifies the number of source page-images to impose
# upon a single side of an instance of a selected
# medium. For example, if the value is:
# '1': The Printer SHALL place one logical page on a
# single side of an instance of the selected medium
# (MAY add some sort of translation, scaling, or
# rotation).
# '2': The Printer SHALL place two logical pages on a
# single side of an instance of the selected medium
# (MAY add some sort of translation, scaling, or
# rotation).
# '4': The Printer SHALL place four logical pages on a
# single side of an instance of the selected medium
# (MAY add some sort of translation, scaling, or
# rotation).
1, 2, 4
media-size = STRING L M O
na-letter
# Size values 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
white
# The color of the print media
other, unknown, white, pink, yellow, buff, goldenrod, blue,
green, transparent
color-supported = BOOLEAN O
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false
# Indicates whether color is supported
color-type = STRING L M O
none
# Whether the printer supports color
none, highlight, three color, four color, monochromatic
marker-color = STRING L M O
black
# The name of the color of this colorant(ink).
other, unknown, white, red, green, blue, cyan, magenta,
yellow, black
max-speed = INTEGER O
# The maximum speed of the printer expressed in Speed
# units.
speed-units = STRING O
sheetsPerHour
# Unit of speed for the Max speed value.
tenThousandthsOfInchesPerHour, micrometersPerHour,
charactersPerHour, linesPerHour, impressionsPerHour,
sheetsPerHour, dotRowPerHour, feetPerHour, metersPerHour
document-format = STRING O M
# The format of the data to be printed. The standard
# values for this attribute are Internet Media types
# which are sometimes called MIME types.
paper-output = STRING M L O
standard
# The mode in which pages output are arranged.
standard, noncollated sort, collated sort, stack, unknown
media-direction = STRING O
portrait
# The orientation of the media as it is fed to the
# printer.
portrait, landscape, unknown
print-quality = STRING O
normal
# Subjective evaluation of the overall printing quality.
draft, normal, high
resolution = STRING L M O
unknown
# The pixel density of the printer 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
-1
# 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
-1
# The maximum size, in Kilobytes, of a print job that
# the print queue will accept." A value of -1 indicates
# there is no limit.
finishing = STRING M O
none
# Identifies the finishing operationssupported by the printer.
none, staple, staple-top-left, staple-bottom-left,
staple-top-right, staple-bottom-right, saddle-stitch,
edge-stitch, punch, bind, cover
stacking-order = STRING O
unknown
# 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
unknown
# Orientation of pages as the are printed and ejected from
# the printer.
unknown, face up, face down
service-person = STRING O M
# A list of service contact names for this printer.
media-type = STRING O M
stationery
# Media types 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
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media-length = INTEGER O
-1
# 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-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
-1
# The unit of media capacity.
# -1 indicates that the units are unknown.
-1, .0001 inches, micrometers, sheets, feet, meters
-------------------- template ends here ----------------------
5. Summary of Required Attributes
The purpose of having attributes associated with a service URL is
to provide a dynamic search capability to service location clients.
It is not intended to burden server implementations with additional
information to provide in a registration. For this reason, the only
a subset of the attributes included in this template are required in
compliant implemenations. The only attributes that are required are
name, description and protocols.
6. Acknowledgments
This document is a product of the Service Location Working group.
A special thanks goes out to Scott Isaacson and members of the IPP
working group for their work on an IPP directory schema, and review
of the attributes carried forward into this document.
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A. 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. It also includes
attributes that may not have a specific origin, but were deemed
useful in locating a printer service.
Attribute Printer MIB[5] IPP[3] Salutation[6]
Printer Name X
Printer Description X
Printer Info X
Protocols
Make/Model X
Location Description X
Location Address
Operator X
Duplex Mode X
Priority Queue X
Fonts Supported X
Number Up X
Media Size X X
Media Color X
Color Supported X
Color Type
Colors
Max Speed X X
Speed Units X X
Document Format X X
Paper Output X
Media Direction X
Print Quality X
Resolution X X
Max Copy Count X
Max Job Size X
Finishings Supported X
Stacking Order X
Stacking Orientation X X
Service Person X
Media Type X
Media Length X
Media Capacity X
Media Capacity Units X
B. References
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[1]J. Veizades, E. Guttman, C. Perkins, and S. Kaplan. "Service
Location Protocol", RFC 2165. June 1997.
[2]L. McLaughlin III, "Line Printer Daemon Protocol",
RFC 1179. August 1990.
[3]R. deBry, T. Hastings, R. Herriot, S. Isaacson,
P. Powell, "IPP/1.0: Model and Semantics", Work
in progress, November 1997.
[4]E. Guttman, C. Perkins, J. Kempf, "Service Templates and service:
Schemes", Work in Progress, November, 1997
draft-ietf-svrloc-service-scheme-06.txt
[5]R. Smith, F. Wright, T. Hastings, S. Zilles, J. Gyllenskog,
"Printer MIB", RFC 1759. 03/28/1995.
[6]Salutation Consortium, Inc., "Salutation Architecture
Specification V2.0", December 1996.
Full Copyright Statement
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HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
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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: +1 415 786-5790
email: Pete.StPierre@Eng.Sun.COM
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