RFC7612: Lightweight Directory Access Protocol (LDAP): Schema for Printer Services
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Obsoletes:
RFC3712
Independent Submission P. Fleming
Request for Comments: 7612 Independent
Obsoletes: 3712 I. McDonald
Category: Informational High North
ISSN: 2070-1721 June 2015
Lightweight Directory Access Protocol (LDAP):
Schema for Printer Services
Abstract
This document defines a schema, object classes, and attributes, for
Printers and print services, for use with directories that support
the Lightweight Directory Access Protocol (RFC 4510). This document
is based on the Printer attributes listed in Appendix E of "Internet
Printing Protocol/1.1: Model and Semantics" (RFC 2911). Additional
Printer attributes are based on definitions in "Printer MIB v2" (RFC
3805), "PWG Command Set Format for IEEE 1284 Device ID v1.0" (PWG
5107.2), "IPP Job and Printer Extensions - Set 3 (JPS3)" (PWG
5100.13), and "IPP Everywhere" (PWG 5100.14).
This memo is an Independent Submission to the RFC Editor by the
Internet Printing Protocol (IPP) Working Group of the IEEE-ISTO
Printer Working Group (PWG), as part of their PWG "IPP Everywhere"
(PWG 5100.14) project for secure mobile printing with vendor-neutral
Client software.
This document obsoletes RFC 3712.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This is a contribution to the RFC Series, independently of any other
RFC stream. The RFC Editor has chosen to publish this document at
its discretion and makes no statement about its value for
implementation or deployment. Documents approved for publication by
the RFC Editor are not a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7612.
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Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document.
Table of Contents
1. Introduction ....................................................4
1.1. Relationship to SLP Printer Service ........................4
1.2. Source of LDAP Printer Attributes ..........................4
1.3. Source of LDAP Printer Schema OIDs .........................5
1.3.1. IBM Assignments for RFC 3712 ........................5
1.3.2. IEEE-ISTO PWG Assignments ...........................5
1.4. Rationale for Design Choices ...............................5
1.4.1. Rationale for Using DirectoryString Syntax ..........5
1.4.2. Rationale for Using caseIgnoreMatch .................6
1.4.3. Rationale for Using caseIgnoreSubstringsMatch .......7
2. Conventions Used in This Document ...............................8
2.1. Requirements Language ......................................8
2.2. LDAP Schema Descriptions ...................................8
2.3. Abbreviations ..............................................8
3. Definition of Object Classes ....................................9
3.1. slpServicePrinter .........................................10
3.2. printerAbstract ...........................................10
3.3. printerService ............................................11
3.4. printerServiceAuxClass ....................................12
3.5. printerIPP ................................................12
3.6. printerLPR ................................................12
4. Definition of Attribute Types ..................................13
4.1. printer-uri ...............................................15
4.2. printer-xri-supported .....................................16
4.3. printer-name ..............................................18
4.4. printer-natural-language-configured .......................19
4.5. printer-location ..........................................19
4.6. printer-info ..............................................20
4.7. printer-more-info .........................................21
4.8. printer-make-and-model ....................................21
4.9. printer-ipp-versions-supported ............................22
4.10. printer-multiple-document-jobs-supported .................23
4.11. printer-charset-configured ...............................23
4.12. printer-charset-supported ................................24
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4.13. printer-generated-natural-language-supported .............24
4.14. printer-document-format-supported ........................25
4.15. printer-color-supported ..................................25
4.16. printer-compression-supported ............................26
4.17. printer-pages-per-minute .................................26
4.18. printer-pages-per-minute-color ...........................27
4.19. printer-finishings-supported .............................27
4.20. printer-number-up-supported ..............................28
4.21. printer-sides-supported ..................................28
4.22. printer-media-supported ..................................29
4.23. printer-media-local-supported ............................30
4.24. printer-resolution-supported .............................30
4.25. printer-print-quality-supported ..........................31
4.26. printer-job-priority-supported ...........................32
4.27. printer-copies-supported .................................32
4.28. printer-job-k-octets-supported ...........................33
4.29. printer-current-operator .................................33
4.30. printer-service-person ...................................34
4.31. printer-delivery-orientation-supported ...................34
4.32. printer-stacking-order-supported .........................35
4.33. printer-output-features-supported ........................36
4.34. printer-aliases ..........................................37
4.35. printer-device-id ........................................37
4.36. printer-device-service-count .............................38
4.37. printer-uuid .............................................38
4.38. printer-charge-info ......................................39
4.39. printer-charge-info-uri ..................................39
4.40. printer-geo-location .....................................40
4.41. printer-ipp-features-supported ...........................41
5. Definition of Syntaxes .........................................42
6. Definition of Matching Rules ...................................42
7. IANA Considerations ............................................42
7.1. Registration of Attribute Types ...........................43
7.2. Object Classes and Attribute Types from RFC 3712 ..........44
8. Internationalization Considerations ............................45
9. Security Considerations ........................................45
10. References ....................................................46
10.1. Normative References .....................................46
10.2. Informative References ...................................50
Appendix A. Changes since RFC 3712 ................................52
Acknowledgments ...................................................54
Authors' Addresses ................................................54
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RFC 7612 LDAP Schema for Printer Services June 2015
1. Introduction
This document defines several object classes to provide Lightweight
Directory Access Protocol (LDAP) [RFC4510] applications with flexible
options in defining Printer information using an LDAP schema.
Classes are provided for defining directory entries with common
Printer information as well as for extending existing directory
entries with Service Location Protocol Version 2 (SLPv2) [RFC2608],
Internet Printing Protocol/1.1 (IPP/1.1) [RFC2911], and lineprinter
(LPR) [RFC1179] protocol-specific information.
This memo is an Independent Submission to the RFC Editor by the
Internet Printing Protocol Working Group of the IEEE-ISTO Printer
Working Group, as part of their Printer Working Group (PWG) "IPP
Everywhere" (PWG 5100.14) project for secure mobile printing with
vendor-neutral Client software.
1.1. Relationship to SLP Printer Service
The schema defined in this document is technically aligned with the
stable IANA-registered 'service:printer:' v2.0 template [SLPPRT20],
for compatibility with already-deployed SLPv2 [RFC2608] service
advertising and discovery infrastructure. The attribute syntaxes are
technically aligned with the 'service:printer:' v2.0 template;
therefore, simpler types are sometimes used (for example,
'DirectoryString' [RFC4517] rather than 'labeledURI' [RFC2079] for
the 'printer-uri' attribute).
1.2. Source of LDAP Printer Attributes
The schema defined in this document is based on:
o all of the Printer attributes listed in Appendix E ("Generic
Directory Schema") of "Internet Printing Protocol/1.1: Model and
Semantics" [RFC2911] that are defined in Section 4.4 ("Printer
Description Attributes") of [RFC2911]
o selected Printer attributes defined in "Printer MIB v2" [RFC3805],
"PWG Command Set for IEEE 1284 Device ID v1.0" [PWG5107.2], "IPP
Job and Printer Extensions - Set 3 (JPS3)" [PWG5100.13], and "IPP
Everywhere" [PWG5100.14]
See the table of Printer attributes and source documents in Section 4
("Definition of Attribute Types") of this document.
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1.3. Source of LDAP Printer Schema OIDs
1.3.1. IBM Assignments for RFC 3712
In March 2000, IBM permanently assigned ASN.1 OIDs to all of the
object classes and attribute types that were defined in the original
LDAP Printer Schema [RFC3712] (see Section 7.2).
1.3.2. IEEE-ISTO PWG Assignments
In October 2011, IBM permanently delegated the base ASN.1 OID
"1.3.18.0.2.24.46" to the IEEE-ISTO PWG for use in any PWG project.
In October 2011, the IEEE-ISTO PWG permanently assigned subordinate
ASN.1 OIDs for all of the new attribute types defined in this updated
LDAP Printer Schema (see Section 7.1).
1.4. Rationale for Design Choices
1.4.1. Rationale for Using DirectoryString Syntax
The attribute syntax 'DirectoryString' (UTF-8 [STD63]) defined in
[RFC4517] is specified for several groups of string attributes that
are defined in this document:
1) URI
- printer-uri, printer-xri-supported, printer-more-info,
printer-charge-info-uri, printer-uuid
The UTF-8 encoding is compatible with deployment of (UTF-8
based) Internationalized Resource Identifiers (IRIs) [RFC3987].
2) Description
- printer-name, printer-location, printer-info,
printer-make-and-model
The UTF-8 encoding supports descriptions in any language,
conformant with the IETF Policy on Character Sets and Languages
[BCP18].
Note: The printer-natural-language-configured attribute contains
a language tag [BCP47] for these description attributes (for
example, to support text-to-speech conversions).
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3) Keyword
- printer-compression-supported, printer-finishings-supported,
printer-media-supported, printer-media-local-supported,
printer-print-quality-supported
The UTF-8 encoding is compatible with the current IPP/1.1
[RFC2911] definition of the equivalent attributes, most of which
have the IPP/1.1 union syntax 'keyword' or 'name'. The keyword
attributes defined in this document are extensible by site-
specific or vendor-specific 'names' that behave like new
'keywords'.
Note: In IPP/1.1, each value is strongly typed over-the-wire as
either 'keyword' or 'name'. This union selector is not
preserved in the definitions of these equivalent LDAP
attributes.
1.4.2. Rationale for Using caseIgnoreMatch
The EQUALITY matching rule 'caseIgnoreMatch' defined in [RFC4517] is
specified for several groups of string attributes that are defined in
this document:
1) URI
These URI attributes specify EQUALITY matching with
'caseIgnoreMatch' (rather than with 'caseExactMatch') in order to
conform to the spirit of [STD66], which requires case-insensitive
matching on the host part of a URI versus case-sensitive matching
on the remainder of a URI.
These URI attributes follow existing practice of supporting
case-insensitive equality matching for host names in the
associatedDomain attribute defined in [RFC4524].
Either equality matching rule choice would be a compromise:
a) case-sensitive whole URI matching can lead to false negative
matches and has been shown to be fragile (given deployed client
applications that 'pretty up' host names displayed and
transferred in URI);
b) case-insensitive whole URI matching can lead to false positive
matches, although it is a dangerous practice to publish URI
that differ only by case (for example, in the path elements).
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2) Description
Case-insensitive equality matching is more user-friendly for
description attributes.
3) Keyword
Case-insensitive equality matching is more user-friendly for
keyword attributes.
4) IEEE 1284 Device ID
Case-insensitive equality matching is mandatory for IEEE 1284
Device ID attributes.
1.4.3. Rationale for Using caseIgnoreSubstringsMatch
The SUBSTR matching rule 'caseIgnoreSubstringsMatch' defined in
[RFC4517] is specified for several groups of string attributes that
are defined in this document:
1) URI
These URI attributes follow existing practice of supporting
case-insensitive equality matching for host names in the
associatedDomain attribute defined in [RFC4524].
2) Description
Support for case-insensitive substring matching is more
user-friendly for description attributes.
3) Keyword
Support for case-insensitive substring matching is more
user-friendly for keyword attributes.
4) IEEE 1284 Device ID
Support for case-insensitive substring matching is mandatory for
IEEE 1284 Device ID attributes.
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2. Conventions Used in This Document
2.1. Requirements Language
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 [RFC2119].
2.2. LDAP Schema Descriptions
Schema definitions are provided using LDAP [RFC4510] description
formats. Definitions provided here are formatted (line wrapped) for
readability.
2.3. Abbreviations
This document makes use of the following abbreviations (given with
their expanded forms and references for further reading):
IANA - Internet Assigned Numbers Authority
<http://www.iana.org>
IEEE - Institute of Electrical and Electronics Engineers
<http://www.ieee.org>
IPP - Internet Printing Protocol [RFC2911] [PWG5100.12]
<http://www.pwg.org/ipp/>
ISTO - IEEE Industry Standards and Technology Organization
<http://www.ieee-isto.org/>
PWG - IEEE-ISTO Printer Working Group
<http://www.pwg.org>
RFC - Request for Comments
<http://www.rfc-editor.org>
TLS - Transport Layer Security [RFC5246]
URI - Uniform Resource Identifier [STD66]
URL - Uniform Resource Locator [STD66]
UTF-8 - Unicode Transformation Format - 8-bit [STD63]
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3. Definition of Object Classes
We define the following LDAP object classes for use with both generic
Printer-related information and services specific to SLPv2 [RFC2608],
IPP/1.1 [RFC2911], and LPR [RFC1179].
slpServicePrinter - auxiliary class for SLP-registered Printers
printerAbstract - abstract class for all Printer classes
printerService - structural class for Printers
printerServiceAuxClass - auxiliary class for Printers
printerIPP - auxiliary class for IPP Printers
printerLPR - auxiliary class for LPR Printers
The following are some examples of how applications could choose to
use these classes when creating directory entries:
1) Use printerService for directory entries containing common Printer
information.
2) Use both printerService and slpServicePrinter for directory
entries containing common Printer information for SLP-registered
Printers.
3) Use printerService, printerLPR, and printerIPP for directory
entries containing common Printer information for Printers that
support both LPR and IPP.
4) Use printerServiceAuxClass and object classes not defined by this
document for directory entries containing common Printer
information. In this example, printerServiceAuxClass is used for
extending other structural classes defining Printer information
with common Printer information defined in this document.
Refer to Section 4 for the definition of attribute types referenced
by these object classes. We use attribute names instead of OIDs in
object class definitions for clarity. Some attribute names described
in [RFC2911] have been prefixed with 'printer-' as recommended in
[RFC2926] and [SLPPRT20].
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3.1. slpServicePrinter
( 1.3.18.0.2.6.254
NAME 'slpServicePrinter'
DESC 'Service Location Protocol (SLP) information.'
AUXILIARY
SUP slpService
)
This auxiliary class defines information specific to the Service
Location Protocol (SLPv2) [RFC2608]. It MAY be used to create new,
or extend existing, directory entries with SLP 'service:printer'
abstract service type information as defined in [SLPPRT20]. This
object class is derived from 'slpService', the parent class for all
SLP services, defined in [RFC2926].
3.2. printerAbstract
( 1.3.18.0.2.6.258
NAME 'printerAbstract'
DESC 'Printer-related information.'
ABSTRACT
SUP top
MAY ( printer-name $
printer-natural-language-configured $
printer-location $
printer-info $
printer-more-info $
printer-make-and-model $
printer-multiple-document-jobs-supported $
printer-charset-configured $
printer-charset-supported $
printer-generated-natural-language-supported $
printer-document-format-supported $
printer-color-supported $
printer-compression-supported $
printer-pages-per-minute $
printer-pages-per-minute-color $
printer-finishings-supported $
printer-number-up-supported $
printer-sides-supported $
printer-media-supported $
printer-media-local-supported $
printer-resolution-supported $
printer-print-quality-supported $
printer-job-priority-supported $
printer-copies-supported $
printer-job-k-octets-supported $
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printer-current-operator $
printer-service-person $
printer-delivery-orientation-supported $
printer-stacking-order-supported $
printer-output-features-supported $
printer-device-id $
printer-device-service-count $
printer-uuid $
printer-charge-info $
printer-charge-info-uri $
printer-geo-location )
)
This abstract class defines Printer information. It is a base class
for deriving other Printer-related classes, such as, but not limited
to, classes defined in this document. It defines a common set of
Printer attributes that are not specific to any one type of service,
protocol, or operating system.
3.3. printerService
( 1.3.18.0.2.6.255
NAME 'printerService'
DESC 'Printer information.'
STRUCTURAL
SUP printerAbstract
MAY ( printer-uri $
printer-xri-supported )
)
This structural class defines Printer information. It is derived
from class printerAbstract and thus inherits common Printer
attributes. This class can be used with or without auxiliary classes
to define Printer information. Auxiliary classes can be used to
extend the common Printer information with information specific to
the protocol, service, or operating system.
Note: When extending other structural classes with auxiliary classes,
printerService SHOULD NOT be used.
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3.4. printerServiceAuxClass
( 1.3.18.0.2.6.257
NAME 'printerServiceAuxClass'
DESC 'Printer information.'
AUXILIARY
SUP printerAbstract
MAY ( printer-uri $
printer-xri-supported )
)
This auxiliary class defines Printer information. It is derived from
class printerAbstract and thus inherits common Printer attributes.
3.5. printerIPP
( 1.3.18.0.2.6.256
NAME 'printerIPP'
DESC 'Internet Printing Protocol (IPP) information.'
AUXILIARY
SUP top
MAY ( printer-ipp-versions-supported $
printer-ipp-features-supported $
printer-multiple-document-jobs-supported )
)
This auxiliary class defines Internet Printing Protocol (IPP/1.1)
[RFC2911] information. It is used to extend structural classes with
IPP-specific Printer information.
Note: See "Internet Printing Protocol/1.1: IPP URL Scheme" [RFC3510]
and "Internet Printing Protocol (IPP) over HTTPS Transport Binding
and the 'ipps' URI Scheme" [RFC7472] for conforming URI for IPP
Printers.
3.6. printerLPR
( 1.3.18.0.2.6.253
NAME 'printerLPR'
DESC 'LPR information.'
AUXILIARY
SUP top
MUST ( printer-name )
MAY ( printer-aliases )
)
This auxiliary class defines LPR [RFC1179] information. It is used
to identify directory entries that support LPR.
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4. Definition of Attribute Types
The following attribute types are referenced by the object classes
defined in Section 3.
The following attribute types reference syntax OIDs defined in
Section 3 of [RFC4517] (see Section 5 ("Definition of Syntaxes")
below).
The following attribute types reference matching rule names (instead
of OIDs) for clarity (see Section 6 below). For optional attributes,
if the Printer information is not known, the attribute value
SHOULD NOT be set. In the following definitions, referenced matching
rules are defined in Section 4 of [RFC4517] and discussed in
Section 6 ("Definition of Matching Rules") later in this document.
Note: For compatibility with existing implementations of [RFC3712]
and underlying string length limits in [RFC2707], [RFC2911],
[RFC3805], [PWG5107.2], [PWG5100.13], and [PWG5100.14],
implementations of the attributes defined in this document SHOULD NOT
exceed those underlying string length limits (to avoid truncation and
false matches).
Note: For interoperability and consistent text display, values of
attributes defined in this document (a) SHOULD be normalized as
recommended in "Unicode Format for Network Interchange" [RFC5198];
(b) SHOULD NOT contain DEL or any C0 or C1 control characters except
for HT, CR, and LF; (c) SHOULD only contain CR and LF characters
together (not as singletons); and (d) SHOULD NOT contain HT, CR, or
LF characters in names, e.g., printer-name and printer-aliases.
Note: Some of the following attributes are described as 'List of xxx'
(using a comma as the member delimiter). Some other attributes are
described as 'One of xxx' (single-valued). In all cases, any
attribute can have multiple values represented as multiple instances,
except where explicitly restricted in syntax to be single-valued.
Note: Values of the string attributes printer-xri-supported and
printer-resolution-supported use different field delimiters ('<' and
'>', respectively). These two field delimiters are different for
compatibility with the corresponding attributes in the IANA-
registered SLP 'service:printer:' v2.0 template [SLPPRT20], which was
defined before the original LDAP Printer Schema [RFC3712] was
written.
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The following table is a summary of the attribute names defined by
this document and their corresponding source document names as
defined in [RFC2911], [RFC3805], [PWG5107.2], or [PWG5100.13]. Some
source attribute names have been prefixed with 'printer-' as
recommended in [RFC2926], to address the flat namespace for LDAP
identifiers.
LDAP and SLP Printer Schema Source Document and Attribute Name
------------------------------ -------------------------------------
*** IPP/1.1 and Semantics Model [RFC2911]
printer-uri
printer-xri-supported
[printer-uri-supported]
[uri-authentication-supported]
[uri-security-supported]
printer-name printer-name
printer-natural-language-configured
natural-language-configured
printer-location printer-location
printer-info printer-info
printer-more-info printer-more-info
printer-make-and-model printer-make-and-model
printer-ipp-versions-supported ipp-versions-supported
printer-multiple-document-jobs-supported
multiple-document-jobs-supported
printer-charset-configured charset-configured
printer-charset-supported charset-supported
printer-generated-natural-language-supported
generated-natural-language-supported
printer-document-format-supported
document-format-supported
printer-color-supported color-supported
printer-compression-supported compression-supported
printer-pages-per-minute pages-per-minute
printer-pages-per-minute-color pages-per-minute-color
printer-finishings-supported finishings-supported
printer-number-up-supported number-up-supported
printer-sides-supported sides-supported
printer-media-supported media-supported
printer-media-local-supported [site names from IPP media-supported]
printer-resolution-supported printer-resolution-supported
printer-print-quality-supported print-quality-supported
printer-job-priority-supported job-priority-supported
printer-copies-supported copies-supported
printer-job-k-octets-supported job-k-octets-supported
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*** Printer MIB v2 [RFC3805]
printer-current-operator prtGeneralCurrentOperator
printer-service-person prtGeneralServicePerson
printer-delivery-orientation-supported
prtOutputPageDeliveryOrientation
printer-stacking-order-supported
prtOutputStackingOrder
printer-output-features-supported
[prtOutputBursting]
[prtOutputDecollating]
[prtOutputPageCollated]
[prtOutputOffsetStacking]
printer-aliases prtGeneralPrinterName
*** Cmd Set 1284 Device ID [PWG5107.2]
printer-device-id printer-device-id
*** IPP Job/Printer Ext Set3 [PWG5100.13]
printer-device-service-count device-service-count
printer-uuid printer-uuid
printer-charge-info printer-charge-info
printer-charge-info-uri printer-charge-info-uri
printer-geo-location printer-geo-location
printer-ipp-features-supported ipp-features-supported
4.1. printer-uri
( 1.3.18.0.2.4.1140
NAME 'printer-uri'
DESC 'A URI supported by this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
If the printer-xri-supported LDAP attribute is implemented, then this
printer-uri value MUST be listed in printer-xri-supported.
See [STD66] for details of URI syntax.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 1023 octets in length.
Note: LDAP application clients SHOULD NOT attempt to use malformed
URI values read from this attribute. LDAP administrative clients
SHOULD NOT write malformed URI values into this attribute.
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Note: See "Internet Printing Protocol/1.1: IPP URL Scheme" [RFC3510]
and "Internet Printing Protocol (IPP) over HTTPS Transport Binding
and the 'ipps' URI Scheme" [RFC7472] for conforming URI for IPP
Printers.
Note: For SLP-registered Printers, the LDAP printer-uri attribute
SHOULD be set to the value of the SLP-registered URL of the Printer,
for interworking with SLPv2 [RFC2608] service discovery.
Note: See Sections 1.4.1, 1.4.2, and 1.4.3 for rationale for design
choices.
4.2. printer-xri-supported
( 1.3.18.0.2.4.1107
NAME 'printer-xri-supported'
DESC 'An XRI (extended resource identifier) supported by
this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Each value of this attribute MUST consist of a URI (uniform resource
identifier) followed by (optional) authentication and security
fields.
Each XRI field MUST be delimited by '<', with optional trailing
whitespace. For example:
'uri=ipp://example.com/ipp< auth=digest< sec=tls<'
'uri=ipps://example.com/ipp< auth=digest< sec=tls<'
'uri=lpr://example.com/lpr< auth=none< sec=none<'
'uri=mailto:printer@example.com< auth=none< sec=none<'
Note: See the note in Section 4 about the different field delimiters
used in the printer-xri-supported and printer-resolution-supported
attributes ('<' and '>', respectively), chosen for compatibility with
the IANA-registered SLP 'service:printer:' v2.0 template [SLPPRT20].
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
See [STD66] for details of URI syntax.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 1023 octets in length.
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Note: LDAP application clients SHOULD NOT attempt to use malformed
URI values read from this attribute. LDAP administrative clients
SHOULD NOT write malformed URI values into this attribute.
Note: This attribute is based on the IPP/1.1 [RFC2911] attributes
'printer-uri-supported', 'uri-authentication-supported', and
'uri-security-supported' (called the 'Three Musketeers' because they
are parallel, ordered attributes). This attribute unfolds those
IPP/1.1 attributes and thus avoids the ordering (and same number of
values) constraints of the IPP/1.1 separate attributes.
Defined keywords for fields include:
'uri' (IPP 'printer-uri-supported')
'auth' (IPP 'uri-authentication-supported')
'sec' (IPP 'uri-security-supported')
A missing 'auth' field SHOULD be interpreted to mean 'none'. Per
IPP/1.1 [RFC2911], "IPP Job and Printer Extensions - Set 3 (JPS3)"
[PWG5100.13], and the IANA IPP registry [IANAIPP], defined values of
the 'auth' field include:
'none' (no authentication for this URI)
'requesting-user-name' (from operation request)
'basic' (HTTP/1.1 Basic [RFC2617] and [RFC7235])
'digest' (HTTP/1.1 Digest [RFC2617] and [RFC7235])
'certificate' (X.509 Certificate [RFC5280] and [RFC6818])
'negotiate' (HTTP/1.1 Negotiate [RFC4559])
The 'certificate' value refers to the IPP Client certificate
extracted from the TLS session.
A missing 'sec' field SHOULD be interpreted to mean 'none'. Per
IPP/1.1 [RFC2911] and the IANA IPP registry [IANAIPP], defined values
of the 'sec' field include:
'none' (no security for this URI)
'ssl3' (Netscape's Secure Socket Layer protocol (SSL3))
'tls' (IETF TLS, [RFC5246])
Note: The syntax and delimiter for this attribute are aligned with
the equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20]. Whitespace is permitted after (but not before) the
delimiter '<'.
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Note: See "Internet Printing Protocol/1.1: IPP URL Scheme" [RFC3510]
and "Internet Printing Protocol (IPP) over HTTPS Transport Binding
and the 'ipps' URI Scheme" [RFC7472] for conforming URI for IPP
Printers.
Note: See Sections 1.4.1, 1.4.2, and 1.4.3 for rationale for design
choices.
4.3. printer-name
( 1.3.18.0.2.4.1135
NAME 'printer-name'
DESC 'The site-specific administrative name of this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
Values of this attribute SHOULD be specified in the language
specified in printer-natural-language-configured (for example, to
support text-to-speech conversions), although the Printer's name MAY
be specified in any language.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
Note: This name can be the last part of the Printer's URI, or it can
be completely unrelated. This name can contain characters that are
not allowed in a conventional URI (see [STD66]).
Note: For interoperability, values of this attribute (a) SHOULD be
normalized as recommended in "Unicode Format for Network Interchange"
[RFC5198]; and (b) SHOULD NOT contain DEL or any C0 or C1 control
characters.
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4.4. printer-natural-language-configured
( 1.3.18.0.2.4.1119
NAME 'printer-natural-language-configured'
DESC 'The configured natural language for LDAP attributes of
syntax DirectoryString (UTF-8) in this directory entry.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
Also, a possible natural language for IPP protocol string attributes
set by operator, system administrator, or manufacturer. Also, the
(declared) natural language of the printer-name, printer-location,
printer-info, and printer-make-and-model attributes of this Printer.
Values of language tags MUST conform to "Tags for Identifying
Languages" [BCP47]. For example:
'en-us' (English as spoken in the US)
'fr-fr' (French as spoken in France)
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 63 octets in length.
Note: For compatibility with IPP/1.1 [RFC2911], language tags in this
attribute SHOULD be lowercase normalized.
4.5. printer-location
( 1.3.18.0.2.4.1136
NAME 'printer-location'
DESC 'The physical location of this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
For example:
'Room 123A'
'Second floor of building XYZ'
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 127 octets in length.
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Note: For interoperability and consistent text display, values of
this attribute (a) SHOULD be normalized as recommended in "Unicode
Format for Network Interchange" [RFC5198]; (b) SHOULD NOT contain DEL
or any C0 or C1 control characters except for HT, CR, and LF; and
(c) SHOULD only contain CR and LF characters together (not as
singletons).
4.6. printer-info
( 1.3.18.0.2.4.1139
NAME 'printer-info'
DESC 'Descriptive information about this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
For example:
'This Printer can be used for printing color transparencies for
HR presentations'
'Out of courtesy for others, please print only small (1-5 page)
jobs at this Printer'
'This Printer is going away on July 1, 1997; please find a new
Printer'
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 127 octets in length.
Note: For interoperability and consistent text display, values of
this attribute (a) SHOULD be normalized as recommended in "Unicode
Format for Network Interchange" [RFC5198]; (b) SHOULD NOT contain DEL
or any C0 or C1 control characters except for HT, CR, and LF; and
(c) SHOULD only contain CR and LF characters together (not as
singletons).
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4.7. printer-more-info
( 1.3.18.0.2.4.1134
NAME 'printer-more-info'
DESC 'A URI for more information about this specific Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
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.
See [STD66] for details of URI syntax.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 1023 octets in length.
Note: LDAP application clients SHOULD NOT attempt to use malformed
URI values read from this attribute. LDAP administrative clients
SHOULD NOT write malformed URI values into this attribute.
Note: See Sections 1.4.1, 1.4.2, and 1.4.3 for rationale for design
choices.
4.8. printer-make-and-model
( 1.3.18.0.2.4.1138
NAME 'printer-make-and-model'
DESC 'Make and model of this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 127 octets in length.
Note: The Printer manufacturer MAY initially populate this attribute.
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Note: For interoperability and consistent text display, values of
this attribute (a) SHOULD be normalized as recommended in "Unicode
Format for Network Interchange" [RFC5198]; (b) SHOULD NOT contain DEL
or any C0 or C1 control characters except for HT, CR, and LF; and
(c) SHOULD only contain CR and LF characters together (not as
singletons).
4.9. printer-ipp-versions-supported
( 1.3.18.0.2.4.1133
NAME 'printer-ipp-versions-supported'
DESC 'Comma-delimited list of IPP versions supported by
this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'1.1,2.0'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
The IPP protocol version(s) MUST include major and minor versions,
i.e., the exact version numbers for which this Printer implementation
meets the IPP version-specific conformance requirements as registered
in the IANA IPP registry [IANAIPP].
IANA-registered versions of IPP currently are:
'1.0' (IPP/1.0 [RFC2566], OBSOLETE)
'1.1' (IPP/1.1 [RFC2911])
'2.0' (IPP/2.0 [PWG5100.12])
'2.1' (IPP/2.1 [PWG5100.12])
'2.2' (IPP/2.2 [PWG5100.12])
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4.10. printer-multiple-document-jobs-supported
( 1.3.18.0.2.4.1132
NAME 'printer-multiple-document-jobs-supported'
DESC 'Indicates whether or not this Printer supports more than one
document per job.'
EQUALITY booleanMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.7
SINGLE-VALUE
)
4.11. printer-charset-configured
( 1.3.18.0.2.4.1109
NAME 'printer-charset-configured'
DESC 'The configured charset for IPP protocol values of error
and status messages generated by this Printer.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
Also, a possible charset for IPP protocol string attributes set by
operator, system administrator, or manufacturer. For example:
'utf-8' (ISO 10646/Unicode in UTF-8 transform [STD63])
'iso-8859-1' (ISO Latin1)
Values of charset tags SHOULD be defined in the IANA registry of
Character Sets [IANACHAR] (see also [BCP19]), and the '(preferred
MIME name)' SHOULD be used as the charset tag in this attribute.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 63 octets in length.
Note: For compatibility with IPP/1.1 [RFC2911], charset tags in this
attribute SHOULD be lowercase normalized.
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4.12. printer-charset-supported
( 1.3.18.0.2.4.1131
NAME 'printer-charset-supported'
DESC 'One of the charsets supported for IPP protocol values of
IPP string attributes that correspond to attributes of
syntax DirectoryString (UTF-8) for this directory entry.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'utf-8' (ISO 10646/Unicode in UTF-8 transform [STD63])
'iso-8859-1' (ISO Latin1)
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
Values of charset tags SHOULD be defined in the IANA registry of
Character Sets [IANACHAR] (see also [BCP19]), and the '(preferred
MIME name)' SHOULD be used as the charset tag in this attribute.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 63 octets in length.
Note: For compatibility with IPP/1.1 [RFC2911], charset tags in this
attribute SHOULD be lowercase normalized.
4.13. printer-generated-natural-language-supported
( 1.3.18.0.2.4.1137
NAME 'printer-generated-natural-language-supported'
DESC 'One of the natural languages supported for LDAP attributes of
syntax DirectoryString (UTF-8) in this directory entry.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Values of language tags SHOULD conform to "Tags for Identifying
Languages" [BCP47]. For example:
'en-us' (English as spoken in the US)
'fr-ca' (French as spoken in Canada)
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
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Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 63 octets in length.
Note: For compatibility with IPP/1.1 [RFC2911], language tags in this
attribute SHOULD be lowercase normalized.
4.14. printer-document-format-supported
( 1.3.18.0.2.4.1130
NAME 'printer-document-format-supported'
DESC 'One of the source document formats that can be interpreted
and printed by this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Values of document formats SHOULD be MIME media types defined in the
IANA registry of MIME Media Types [IANAMIME] (see also [BCP13]).
For example:
'application/postscript' (Adobe PostScript)
'text/plain' (plain text)
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
4.15. printer-color-supported
( 1.3.18.0.2.4.1129
NAME 'printer-color-supported'
DESC 'Indicates whether or not this Printer is capable of any type of
color printing at all, including highlight color.'
EQUALITY booleanMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.7
SINGLE-VALUE
)
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4.16. printer-compression-supported
( 1.3.18.0.2.4.1128
NAME 'printer-compression-supported'
DESC 'Comma-delimited list of compression algorithms supported by
this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'none'
'deflate,gzip'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
Values defined in IPP/1.1 [RFC2911] and recorded in the IANA IPP
registry [IANAIPP] include:
'none' (no compression is used)
'deflate' (public domain ZIP described in [RFC1951])
'gzip' (GNU ZIP described in [RFC1952])
'compress' (UNIX compression described in [RFC1977])
4.17. printer-pages-per-minute
( 1.3.18.0.2.4.1127
NAME 'printer-pages-per-minute'
DESC 'The nominal number of pages per minute that can be output by
this Printer.'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
This attribute is informative, not a service guarantee. Typically,
it is the value used in marketing literature to describe this Printer
-- for example, the value for a simplex or black-and-white print
mode.
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4.18. printer-pages-per-minute-color
( 1.3.18.0.2.4.1126
NAME 'printer-pages-per-minute-color'
DESC 'The nominal number of color pages per minute that can be
output by this Printer.'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
This attribute is informative, not a service guarantee. Typically,
it is the value used in marketing literature to describe this
Printer.
4.19. printer-finishings-supported
( 1.3.18.0.2.4.1125
NAME 'printer-finishings-supported'
DESC 'Comma-delimited list of finishing operations supported by
this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'staple'
'staple,punch,bind'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
Values defined in IPP/1.1 [RFC2911] and recorded in the IANA IPP
registry [IANAIPP] include:
'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'.
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RFC 7612 LDAP Schema for Printer Services June 2015
Note: Implementations MAY support other values.
4.20. printer-number-up-supported
( 1.3.18.0.2.4.1124
NAME 'printer-number-up-supported'
DESC 'Maximum number of print-stream pages that can be imposed upon
a single side of an instance of a selected medium by this
Printer.'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
For example:
'1'
'4'
Note: Values of this attribute differ from the corresponding IPP
attribute, in that only the maximum number-up is mapped from the
corresponding IPP attribute 'number-up-supported' defined in
[RFC2911].
4.21. printer-sides-supported
( 1.3.18.0.2.4.1123
NAME 'printer-sides-supported'
DESC 'Comma-delimited list of impression sides (one or two) and the
two-sided impression rotations supported by this Printer.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'one-sided'
'one-sided,two-sided-short-edge'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
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Values defined in IPP/1.1 [RFC2911] and recorded in the IANA IPP
registry [IANAIPP] are:
'one-sided'
'two-sided-long-edge'
'two-sided-short-edge'
4.22. printer-media-supported
( 1.3.18.0.2.4.1122
NAME 'printer-media-supported'
DESC 'One of the names/sizes/types/colors of the media supported by
this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Values SHOULD conform to "PWG Media Standardized Names 2.0 (MSN2)"
[PWG5101.1].
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
Values of standardized media size names defined in [PWG5101.1] and
recorded in the IANA IPP registry [IANAIPP] include:
'na_letter_8.5x11in'
'iso_a4_210x297mm'
Values of standardized media types defined in [PWG5101.1] and
recorded in the IANA IPP registry [IANAIPP] include:
'envelope'
'stationery'
Values of standardized media colors defined in [PWG5101.1] and
recorded in the IANA IPP registry [IANAIPP] include:
'white'
'blue'
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
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4.23. printer-media-local-supported
( 1.3.18.0.2.4.1117
NAME 'printer-media-local-supported'
DESC 'One of the site-specific media supported by this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Values SHOULD conform to "PWG Media Standardized Names 2.0 (MSN2)"
[PWG5101.1].
For example:
'custom_purchasing-form_8.5x11in' (site-specific name)
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
4.24. printer-resolution-supported
( 1.3.18.0.2.4.1121
NAME 'printer-resolution-supported'
DESC 'One of the resolutions supported for printing documents by
this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Each resolution value MUST be a string containing three fields:
1) Cross-feed direction resolution (positive integer);
2) Feed direction resolution (positive integer);
3) Unit -- 'dpi' (dots per inch) or 'dpcm' (dots per centimeter).
Each resolution field MUST be delimited by '>', with optional
trailing whitespace. For example:
'300> 300> dpi>'
'600> 600> dpi>'
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Note: See the note in Section 4 about the different field delimiters
used in the printer-xri-supported and printer-resolution-supported
attributes ('<' and '>', respectively), chosen for compatibility with
the IANA-registered SLP 'service:printer:' v2.0 template [SLPPRT20].
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
Note: This attribute is based on 'printer-resolution-supported'
defined in IPP/1.1 [RFC2911] with a complex encoding derived from
'prtMarkerAddressabilityFeedDir', 'prtMarkerAddressabilityXFeedDir',
and 'prtMarkerAddressabilityUnit' defined in "Printer MIB v2"
[RFC3805] (which have integer encodings).
Note: The syntax and delimiter for this attribute are aligned with
the equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20]. Whitespace is permitted after (but not before) the
delimiter '>'.
4.25. printer-print-quality-supported
( 1.3.18.0.2.4.1120
NAME 'printer-print-quality-supported'
DESC 'Comma-delimited list of print qualities supported
for printing documents on this Printer.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'unknown'
'draft,normal,high'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
Values defined in IPP/1.1 [RFC2911] and recorded in the IANA IPP
registry [IANAIPP] include:
'draft'
'normal'
'high'
Note: The value 'unknown' MUST only be reported if the corresponding
IPP attribute is not present, i.e., the value 'unknown' is an
artifact of this LDAP mapping.
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4.26. printer-job-priority-supported
( 1.3.18.0.2.4.1110
NAME 'printer-job-priority-supported'
DESC 'Indicates the number of job priority levels supported by
this Printer.'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
An IPP/1.1 [RFC2911] conformant Printer, which supports job priority,
always supports a full range of priorities from '1' to '100' (to
ensure consistent behavior); therefore, this attribute describes the
'granularity' of priority supported. Values of this attribute are
from '1' to '100'.
4.27. printer-copies-supported
( 1.3.18.0.2.4.1118
NAME 'printer-copies-supported'
DESC 'The maximum number of copies of a document that can be printed
as a single job on this Printer.'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
A positive value indicates the maximum supported copies. A value of
'0' indicates no maximum limit. A value of '-1' indicates 'unknown'.
Note: The syntax and values for this attribute are aligned with the
equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20].
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4.28. printer-job-k-octets-supported
( 1.3.18.0.2.4.1111
NAME 'printer-job-k-octets-supported'
DESC 'The maximum size of an incoming print job that this Printer
will accept, in kilobytes (1,024 octets).'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
A positive value indicates the maximum supported job size. A value
of '0' indicates no maximum limit. A value of '-1' indicates
'unknown'.
Note: The syntax and values for this attribute are aligned with the
equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20].
4.29. printer-current-operator
( 1.3.18.0.2.4.1112
NAME 'printer-current-operator'
DESC 'The identity of the current human operator responsible for
operating this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
The value of this attribute SHOULD include information that would
enable other humans to reach the operator, such as a telephone
number.
Note: For interoperability and consistent text display, values of
this attribute (a) SHOULD be normalized as recommended in "Unicode
Format for Network Interchange" [RFC5198]; (b) SHOULD NOT contain DEL
or any C0 or C1 control characters except for HT, CR, and LF; and
(c) SHOULD only contain CR and LF characters together (not as
singletons).
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4.30. printer-service-person
( 1.3.18.0.2.4.1113
NAME 'printer-service-person'
DESC 'The identity of the current human service person responsible
for servicing this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
The value of this attribute SHOULD include information that would
enable other humans to reach the service person, such as a telephone
number.
Note: For interoperability and consistent text display, values of
this attribute (a) SHOULD be normalized as recommended in "Unicode
Format for Network Interchange" [RFC5198]; (b) SHOULD NOT contain DEL
or any C0 or C1 control characters except for HT, CR, and LF; and
(c) SHOULD only contain CR and LF characters together (not as
singletons).
4.31. printer-delivery-orientation-supported
( 1.3.18.0.2.4.1114
NAME 'printer-delivery-orientation-supported'
DESC 'Comma-delimited list of delivery orientations of pages as they
are printed and ejected supported by this Printer.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'unknown'
'face-up,face-down'
Values defined in "Printer MIB v2" [RFC3805] for
prtOutputPageDeliveryOrientation are:
'face-up'
'face-down'
Note: The value 'unknown' MUST only be reported if the corresponding
Printer MIB attribute is not present, i.e., the value 'unknown' is an
artifact of this LDAP mapping.
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Note: The syntax and values for this attribute are aligned with the
equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20].
4.32. printer-stacking-order-supported
( 1.3.18.0.2.4.1115
NAME 'printer-stacking-order-supported'
DESC 'Comma-delimited list of stacking orders of pages as they are
printed and ejected supported by this Printer.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'unknown'
'first-to-last'
'first-to-last,last-to-first'
Values defined in "Printer MIB v2" [RFC3805] for
prtOutputStackingOrder are:
'first-to-last'
'last-to-first'
Note: The value 'unknown' MUST only be reported if the corresponding
Printer MIB attribute is not present, i.e., the value 'unknown' is an
artifact of this LDAP mapping.
Note: The syntax and values for this attribute are aligned with the
equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20].
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4.33. printer-output-features-supported
( 1.3.18.0.2.4.1116
NAME 'printer-output-features-supported'
DESC 'Comma-delimited list of output features supported by
this Printer.'
EQUALITY caseIgnoreMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'unknown'
'bursting,decollating'
'offset-stacking'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
Values defined in "Printer MIB v2" [RFC3805] for prtOutputBursting,
prtOutputDecollating, prtOutputPageCollated, and
prtOutputOffsetStacking are:
'bursting'
'decollating'
'page-collating'
'offset-stacking'
Note: The value 'unknown' MUST only be reported if the corresponding
Printer MIB attributes are not present, i.e., the value 'unknown' is
an artifact of this LDAP mapping.
Note: The syntax and values for this attribute are aligned with the
equivalent attribute in the 'service:printer:' v2.0 template
[SLPPRT20].
Note: Implementations MAY support other values.
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4.34. printer-aliases
( 1.3.18.0.2.4.1108
NAME 'printer-aliases'
DESC 'One of the site-specific administrative names of this Printer
in addition to the value specified for printer-name.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
Values of this attribute SHOULD be specified in the language
specified in printer-natural-language-configured (for example, to
support text-to-speech conversions), although the Printer's alias MAY
be specified in any language.
Note: Multiple values for this attribute are represented as multiple
instances of this attribute.
Note: For compatibility with IPP/1.1 [RFC2911], values of this
attribute SHOULD NOT exceed 255 octets in length.
Note: For interoperability, values of this attribute (a) SHOULD be
normalized as recommended in "Unicode Format for Network Interchange"
[RFC5198]; and (b) SHOULD NOT contain DEL or any C0 or C1 control
characters.
4.35. printer-device-id
( 1.3.18.0.2.24.46.1.101
NAME 'printer-device-id'
DESC 'The IEEE 1284 Device ID for this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
Values of this attribute SHOULD conform to "PWG Command Set Format
for IEEE 1284 Device ID v1.0" [PWG5107.2].
Note: For compatibility with [PWG5100.14] and [PWG5107.2], values of
this attribute SHOULD NOT exceed 1023 octets in length.
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4.36. printer-device-service-count
( 1.3.18.0.2.24.46.1.102
NAME 'printer-device-service-count'
DESC 'The number of Printer (print service) instances configured on
this Imaging Device (host system).'
EQUALITY integerMatch
ORDERING integerOrderingMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27
SINGLE-VALUE
)
A positive value indicates the number of Printer (print service)
instances. A value of '-1' indicates 'unknown'. A value of '0' is
not meaningful (because this attribute must be reported by some
Printer instance).
Note: The syntax and values for this attribute are aligned with the
equivalent 'device-service-count' attribute defined in [PWG5100.13].
4.37. printer-uuid
( 1.3.18.0.2.24.46.1.104
NAME 'printer-uuid'
DESC 'A URN specifying the UUID of this Printer (print service)
instance on this Imaging Device (host system).'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
For example:
'urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6'
Values of this attribute MUST conform to the Universally Unique
Identifier (UUID) URN namespace [RFC4122].
Note: For compatibility with [PWG5100.13] and [RFC4122], values of
this attribute SHOULD NOT exceed 45 octets in length.
Note: LDAP application clients SHOULD NOT attempt to use malformed
URN values read from this attribute. LDAP administrative clients
SHOULD NOT write malformed URN values into this attribute.
Note: The syntax and values for this attribute are aligned with the
equivalent 'printer-uuid' attribute defined in [PWG5100.13].
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4.38. printer-charge-info
( 1.3.18.0.2.24.46.1.105
NAME 'printer-charge-info'
DESC 'Descriptive information about paid printing services for this
Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
For example:
'This Printer can be used for paid printing at 2 cents/page.'
Note: For compatibility with [PWG5100.13], values of this attribute
SHOULD NOT exceed 1023 octets in length.
Note: For interoperability and consistent text display, values of
this attribute (a) SHOULD be normalized as recommended in "Unicode
Format for Network Interchange" [RFC5198]; (b) SHOULD NOT contain any
C0 or C1 control characters except for HT, CR, and LF; and (c) SHOULD
only contain CR and LF characters together (not as singletons).
Note: The syntax and values for this attribute are aligned with the
equivalent 'printer-charge-info' attribute defined in [PWG5100.13].
4.39. printer-charge-info-uri
( 1.3.18.0.2.24.46.1.106
NAME 'printer-charge-info-uri'
DESC 'A URI for a human-readable Web page for paid printing services
for this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
For example:
'http://example.com/charges'
See [STD66] for details of URI syntax.
Note: For compatibility with IPP/1.1 [RFC2911] and [PWG5100.13],
values of this attribute SHOULD NOT exceed 1023 octets in length.
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Note: LDAP application clients SHOULD NOT attempt to use malformed
URI values read from this attribute. LDAP administrative clients
SHOULD NOT write malformed URI values into this attribute.
Note: The syntax and values for this attribute are aligned with the
equivalent 'printer-charge-info-uri' attribute defined in
[PWG5100.13].
4.40. printer-geo-location
( 1.3.18.0.2.24.46.1.107
NAME 'printer-geo-location'
DESC 'A geo: URI specifying the geographic location of this Printer.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE
)
For example:
'geo:13.4125,103.8667'
Values of this attribute MUST conform to the 'geo' URI scheme
[RFC5870].
Note: For compatibility with IPP/1.1 [RFC2911] and [PWG5100.13],
values of this attribute SHOULD NOT exceed 1023 octets in length.
Note: LDAP application clients SHOULD NOT attempt to use malformed
URI values read from this attribute. LDAP administrative clients
SHOULD NOT write malformed URI values into this attribute.
Note: The syntax and values for this attribute are aligned with the
equivalent 'printer-geo-location' attribute defined in [PWG5100.13].
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4.41. printer-ipp-features-supported
( 1.3.18.0.2.24.46.1.108
NAME 'printer-ipp-features-supported'
DESC 'Comma-delimited list of IPP protocol features that
this Printer supports.'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
)
For example:
'none'
'unknown'
'proof-print'
'ipp-everywhere,proof-print,job-save'
Note: Length overflow in values of this attribute MUST be handled by
multiple instances of this attribute, i.e., individual
comma-delimited list members MUST NOT be truncated.
Values of this attribute SHOULD specify only IANA-registered keywords
for the 'ipp-features-supported' attribute defined in [PWG5100.13] or
other Standards Track IETF or IEEE-ISTO PWG specifications if this
Printer implementation meets all of the IPP feature-specific
conformance requirements.
IANA-registered values include:
'none' (No extension features are supported)
'document-object' (Document object defined in [PWG5100.5])
'job-save' (Job save defined in [PWG5100.11])
'ipp-everywhere' ("IPP Everywhere" defined in [PWG5100.14])
'page-overrides' (Page overrides defined in [PWG5100.6])
'proof-print' (Proof print defined in [PWG5100.11])
'subscription-object' (Subscription object defined in [RFC3995])
Note: The value 'unknown' MUST only be reported if the corresponding
IPP Printer attribute is not present, i.e., the value 'unknown' is an
artifact of this LDAP mapping.
Note: The syntax and values for this attribute are aligned with the
equivalent 'ipp-features-supported' attribute defined in
[PWG5100.13].
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5. Definition of Syntaxes
No new attribute syntaxes are defined by this document.
The attribute types defined in Section 4 of this document reference
syntax OIDs defined in Section 3 of [RFC4517], which are summarized
below:
Syntax OID Syntax Description
------------------------------ -------------------------------
1.3.6.1.4.1.1466.115.121.1.7 Boolean
1.3.6.1.4.1.1466.115.121.1.15 DirectoryString (UTF-8 [STD63])
1.3.6.1.4.1.1466.115.121.1.27 Integer
6. Definition of Matching Rules
No new matching rules are defined by this document.
The attribute types defined in Section 4 of this document reference
matching rules defined in Section 4 of [RFC4517], which are
summarized below:
Matching Rule OID Matching Rule Name Usage
----------------------------- ------------------ --------
2.5.13.13 booleanMatch EQUALITY
2.5.13.2 caseIgnoreMatch EQUALITY
2.5.13.14 integerMatch EQUALITY
2.5.13.15 integerOrderingMatch ORDERING
2.5.13.4 caseIgnoreSubstringsMatch SUBSTR
7. IANA Considerations
This document does not define any new syntaxes or matching rules.
This document defines a few new attribute types that have been
registered by IANA per this document (see Section 7.1 below).
All of the object classes and most of the attribute types described
in this document were registered by IANA when RFC 3712 was published
(see Section 7.2 below).
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7.1. Registration of Attribute Types
The following Attribute Type OIDs have been assigned by the IEEE-ISTO
PWG (see Section 1.3.2) and have been registered by IANA.
Subject: Request for Object Identifier Descriptor Registration
Descriptor (short name): see table below
Object Identifier: see table below
Person & email address to contact for further information: see below
Usage: attribute type
Specification: RFC 7612 (this document)
Author/Change Controller:
Ira McDonald
High North Inc.
221 Ridge Ave.
Grand Marais, MI 49839
United States
Phone: +1 906-494-2434
Email: blueroofmusic@gmail.com
Comments:
Attribute Type OID
------------------------------------ ----------------------
printer-device-id 1.3.18.0.2.24.46.1.101
printer-device-service-count 1.3.18.0.2.24.46.1.102
printer-uuid 1.3.18.0.2.24.46.1.104
printer-charge-info 1.3.18.0.2.24.46.1.105
printer-charge-info-uri 1.3.18.0.2.24.46.1.106
printer-geo-location 1.3.18.0.2.24.46.1.107
printer-ipp-features-supported 1.3.18.0.2.24.46.1.108
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7.2. Object Classes and Attribute Types from RFC 3712
This section is strictly informative. None of the LDAP OIDs listed
in this section have been re-registered by IANA.
The following Object Class OIDs were assigned by IBM (see
Section 1.3.1) and were already registered by IANA when RFC 3712 was
published.
Object Class OID
------------------------------------ ----------------
slpServicePrinter 1.3.18.0.2.6.254
printerAbstract 1.3.18.0.2.6.258
printerService 1.3.18.0.2.6.255
printerServiceAuxClass 1.3.18.0.2.6.257
printerIPP 1.3.18.0.2.6.256
printerLPR 1.3.18.0.2.6.253
The following Attribute Type OIDs were assigned by IBM (see
Section 1.3.1) and were already registered by IANA when RFC 3712 was
published.
Attribute Type OID
------------------------------------ -----------------
printer-uri 1.3.18.0.2.4.1140
printer-xri-supported 1.3.18.0.2.4.1107
printer-name 1.3.18.0.2.4.1135
printer-natural-language-configured 1.3.18.0.2.4.1119
printer-location 1.3.18.0.2.4.1136
printer-info 1.3.18.0.2.4.1139
printer-more-info 1.3.18.0.2.4.1134
printer-make-and-model 1.3.18.0.2.4.1138
printer-ipp-versions-supported 1.3.18.0.2.4.1133
printer-multiple-document-jobs-supported 1.3.18.0.2.4.1132
printer-charset-configured 1.3.18.0.2.4.1109
printer-charset-supported 1.3.18.0.2.4.1131
printer-generated-natural-language-supported 1.3.18.0.2.4.1137
printer-document-format-supported 1.3.18.0.2.4.1130
printer-color-supported 1.3.18.0.2.4.1129
printer-compression-supported 1.3.18.0.2.4.1128
printer-pages-per-minute 1.3.18.0.2.4.1127
printer-pages-per-minute-color 1.3.18.0.2.4.1126
printer-finishings-supported 1.3.18.0.2.4.1125
printer-number-up-supported 1.3.18.0.2.4.1124
printer-sides-supported 1.3.18.0.2.4.1123
printer-media-supported 1.3.18.0.2.4.1122
printer-media-local-supported 1.3.18.0.2.4.1117
printer-resolution-supported 1.3.18.0.2.4.1121
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printer-print-quality-supported 1.3.18.0.2.4.1120
printer-job-priority-supported 1.3.18.0.2.4.1110
printer-copies-supported 1.3.18.0.2.4.1118
printer-job-k-octets-supported 1.3.18.0.2.4.1111
printer-current-operator 1.3.18.0.2.4.1112
printer-service-person 1.3.18.0.2.4.1113
printer-delivery-orientation-supported 1.3.18.0.2.4.1114
printer-stacking-order-supported 1.3.18.0.2.4.1115
printer-output-features-supported 1.3.18.0.2.4.1116
printer-aliases 1.3.18.0.2.4.1108
8. Internationalization Considerations
All text string attributes defined in this document of syntax
'DirectoryString' [RFC4517] have values that are encoded in UTF-8
[STD63], as required by [RFC4517].
A language tag [BCP47] for all of the text string attributes defined
in this document is contained in the
printer-natural-language-configured attribute.
Therefore, all object classes defined in this document conform to the
IETF Policy on Character Sets and Languages [BCP18].
Note: For interoperability and consistent text display, values of
attributes defined in this document (a) SHOULD be normalized as
recommended in "Unicode Format for Network Interchange" [RFC5198];
(b) SHOULD NOT contain DEL or any C0 or C1 control characters except
for HT, CR, and LF; (c) SHOULD only contain CR and LF characters
together (not as singletons); and (d) SHOULD NOT contain HT, CR, or
LF characters in names, e.g., printer-name and printer-aliases.
9. Security Considerations
See [RFC4513] for detailed guidance on authentication methods for
LDAP and the use of TLS/1.2 [RFC5246] to supply connection
confidentiality and data integrity for LDAP sessions.
As with any LDAP schema, it is important to protect specific entries
and attributes with the appropriate access control. It is
particularly important that only administrators can modify entries
defined in this LDAP Printer schema. Otherwise, an LDAP client might
be fooled into diverting print service requests from the original
Printer (or spooler) to a malicious intruder's host system, thus
exposing the information in printed documents.
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Note: Security vulnerabilities can arise if DEL or any C0 or C1
control characters are included in names, e.g., printer-name or
printer-aliases.
For additional security considerations regarding deploying Printers
in an IPP environment, see Section 8 of [RFC2911].
10. References
10.1. Normative References
[BCP47] Phillips, A. and M. Davis, "Matching of Language Tags",
BCP 47, RFC 4647, September 2006.
Phillips, A., Ed., and M. Davis, Ed., "Tags for
Identifying Languages", BCP 47, RFC 5646,
September 2009.
<http://www.rfc-editor.org/info/bcp47>
[IANACHAR] Internet Assigned Numbers Authority (IANA) registry
"Character Sets",
<http://www.iana.org/assignments/character-sets>.
[IANAIPP] Internet Assigned Numbers Authority (IANA) registry
"Internet Printing Protocol (IPP) Registrations",
<http://www.iana.org/assignments/ipp-registrations>.
[IANAMIME] Internet Assigned Numbers Authority (IANA) registry
"Media Types", <http://www.iana.org/assignments/
media-types/index.html>.
[PWG5100.5] Carney, D., Hastings, T., and P. Zehler, "IPP Document
Object", PWG 5100.5-2003, October 2003,
<http://www.pwg.org/standards.html>.
[PWG5100.6] Zehler, P., Herriot, R., and K. Ocke, "IPP Page
Overrides", PWG 5100.6-2003, October 2003,
<http://www.pwg.org/standards.html>.
[PWG5100.11] Hastings, T. and D. Fullman, "IPP Job and Printer
Extensions - Set 2 (JPS2)", PWG 5100.11-2010,
October 2010, <http://www.pwg.org/standards.html>.
[PWG5100.12] Bergman, R., Lewis, H., McDonald, I., and M. Sweet, "IPP
Version 2.0 Second Edition (IPP/2.0 SE)",
PWG 5100.12-2011, February 2011,
<http://www.pwg.org/standards.html>.
Fleming & McDonald Informational [Page 46]
RFC 7612 LDAP Schema for Printer Services June 2015
[PWG5100.13] Sweet, M., McDonald, I., and P. Zehler, "IPP Job and
Printer Extensions - Set 3 (JPS3)", PWG 5100.13-2012,
July 2012, <http://www.pwg.org/standards.html>.
[PWG5100.14] Sweet, M., McDonald, I., Mitchell, A., and J. Hutchings,
"IPP Everywhere", PWG 5100.14-2013, January 2013,
<http://www.pwg.org/standards.html>.
[PWG5101.1] Sweet, M., Bergman, R., and T. Hastings, "PWG Media
Standardized Names 2.0 (MSN2)", PWG 5101.1-2013,
March 2013, <http://www.pwg.org/standards.html>.
[PWG5107.2] McDonald, I., "PWG Command Set Format for IEEE 1284
Device ID v1.0", PWG 5107.2-2010, May 2010,
<http://www.pwg.org/standards.html>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
[RFC2617] Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence,
S., Leach, P., Luotonen, A., and L. Stewart, "HTTP
Authentication: Basic and Digest Access Authentication",
RFC 2617, DOI 10.17487/RFC2617, June 1999,
<http://www.rfc-editor.org/info/rfc2617>.
[RFC2707] Bergman, R., Hastings, T., Isaacson, S., and H. Lewis,
"Job Monitoring MIB - V1.0", RFC 2707,
DOI 10.17487/RFC2707, November 1999,
<http://www.rfc-editor.org/info/rfc2707>.
[RFC2911] Hastings, T., Ed., Herriot, R., deBry, R., Isaacson, S.,
and P. Powell, "Internet Printing Protocol/1.1: Model
and Semantics", RFC 2911, DOI 10.17487/RFC2911,
September 2000,
<http://www.rfc-editor.org/info/rfc2911>.
[RFC2926] Kempf, J., Moats, R., and P. St. Pierre, "Conversion of
LDAP Schemas to and from SLP Templates", RFC 2926,
DOI 10.17487/RFC2926, September 2000,
<http://www.rfc-editor.org/info/rfc2926>.
[RFC3510] Herriot, R. and I. McDonald, "Internet Printing
Protocol/1.1: IPP URL Scheme", RFC 3510,
DOI 10.17487/RFC3510, April 2003,
<http://www.rfc-editor.org/info/rfc3510>.
Fleming & McDonald Informational [Page 47]
RFC 7612 LDAP Schema for Printer Services June 2015
[RFC3805] Bergman, R., Lewis, H., and I. McDonald, "Printer
MIB v2", RFC 3805, DOI 10.17487/RFC3805, June 2004,
<http://www.rfc-editor.org/info/rfc3805>.
[RFC3987] Duerst, M. and M. Suignard, "Internationalized Resource
Identifiers (IRIs)", RFC 3987, DOI 10.17487/RFC3987,
January 2005, <http://www.rfc-editor.org/info/rfc3987>.
[RFC3995] Herriot, R. and T. Hastings, "Internet Printing Protocol
(IPP): Event Notifications and Subscriptions", RFC 3995,
DOI 10.17487/RFC3995, March 2005,
<http://www.rfc-editor.org/info/rfc3995>.
[RFC4122] Leach, P., Mealling, M., and R. Salz, "A Universally
Unique IDentifier (UUID) URN Namespace", RFC 4122,
DOI 10.17487/RFC4122, July 2005,
<http://www.rfc-editor.org/info/rfc4122>.
[RFC4510] Zeilenga, K., Ed., "Lightweight Directory Access
Protocol (LDAP): Technical Specification Road Map",
RFC 4510, DOI 10.17487/RFC4510, June 2006,
<http://www.rfc-editor.org/info/rfc4510>.
[RFC4513] Harrison, R., Ed., "Lightweight Directory Access
Protocol (LDAP): Authentication Methods and Security
Mechanisms", RFC 4513, DOI 10.17487/RFC4513, June 2006,
<http://www.rfc-editor.org/info/rfc4513>.
[RFC4517] Legg, S., Ed., "Lightweight Directory Access Protocol
(LDAP): Syntaxes and Matching Rules", RFC 4517,
DOI 10.17487/RFC4517, June 2006,
<http://www.rfc-editor.org/info/rfc4517>.
[RFC4524] Zeilenga, K., Ed., "COSINE LDAP/X.500 Schema", RFC 4524,
DOI 10.17487/RFC4524, June 2006,
<http://www.rfc-editor.org/info/rfc4524>.
[RFC5198] Klensin, J. and M. Padlipsky, "Unicode Format for
Network Interchange", RFC 5198, DOI 10.17487/RFC5198,
March 2008, <http://www.rfc-editor.org/info/rfc5198>.
[RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer
Security (TLS) Protocol Version 1.2", RFC 5246,
DOI 10.17487/RFC5246, August 2008,
<http://www.rfc-editor.org/info/rfc5246>.
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[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
Housley, R., and W. Polk, "Internet X.509 Public Key
Infrastructure Certificate and Certificate Revocation
List (CRL) Profile", RFC 5280, DOI 10.17487/RFC5280,
May 2008, <http://www.rfc-editor.org/info/rfc5280>.
[RFC5870] Mayrhofer, A. and C. Spanring, "A Uniform Resource
Identifier for Geographic Locations ('geo' URI)",
RFC 5870, DOI 10.17487/RFC5870, June 2010,
<http://www.rfc-editor.org/info/rfc5870>.
[RFC6818] Yee, P., "Updates to the Internet X.509 Public Key
Infrastructure Certificate and Certificate Revocation
List (CRL) Profile", RFC 6818, DOI 10.17487/RFC6818,
January 2013, <http://www.rfc-editor.org/info/rfc6818>.
[RFC7235] Fielding, R., Ed., and J. Reschke, Ed., "Hypertext
Transfer Protocol (HTTP/1.1): Authentication", RFC 7235,
DOI 10.17487/RFC7235, June 2014,
<http://www.rfc-editor.org/info/rfc7235>.
[RFC7472] McDonald, I. and M. Sweet, "Internet Printing Protocol
(IPP) over HTTPS Transport Binding and the 'ipps' URI
Scheme", RFC 7472, DOI 10.17487/RFC7472, March 2015,
<http://www.rfc-editor.org/info/rfc7472>.
[STD63] Yergeau, F., "UTF-8, a transformation format of ISO
10646", STD 63, RFC 3629, November 2003,
<http://www.rfc-editor.org/info/std63>.
[STD66] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
Resource Identifier (URI): Generic Syntax", STD 66, RFC
3986, January 2005,
<http://www.rfc-editor.org/info/std66>.
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10.2. Informative References
[BCP13] Freed, N. and J. Klensin, "Multipurpose Internet Mail
Extensions (MIME) Part Four: Registration Procedures",
BCP 13, RFC 4289, December 2005.
Freed, N., Klensin, J., and T. Hansen, "Media Type
Specifications and Registration Procedures", BCP 13,
RFC 6838, January 2013.
<http://www.rfc-editor.org/info/bcp13>
[BCP18] Alvestrand, H., "IETF Policy on Character Sets and
Languages", BCP 18, RFC 2277, January 1998,
<http://www.rfc-editor.org/info/bcp18>.
[BCP19] Freed, N. and J. Postel, "IANA Charset Registration
Procedures", BCP 19, RFC 2978, October 2000,
<http://www.rfc-editor.org/info/bcp19>.
[RFC1179] McLaughlin, L., "Line printer daemon protocol",
RFC 1179, DOI 10.17487/RFC1179, August 1990,
<http://www.rfc-editor.org/info/rfc1179>.
[RFC1951] Deutsch, P., "DEFLATE Compressed Data Format
Specification version 1.3", RFC 1951,
DOI 10.17487/RFC1951, May 1996,
<http://www.rfc-editor.org/info/rfc1951>.
[RFC1952] Deutsch, P., "GZIP file format specification
version 4.3", RFC 1952, DOI 10.17487/RFC1952, May 1996,
<http://www.rfc-editor.org/info/rfc1952>.
[RFC1977] Schryver, V., "PPP BSD Compression Protocol", RFC 1977,
DOI 10.17487/RFC1977, August 1996,
<http://www.rfc-editor.org/info/rfc1977>.
[RFC2079] Smith, M., "Definition of an X.500 Attribute Type and an
Object Class to Hold Uniform Resource Identifiers
(URIs)", RFC 2079, DOI 10.17487/RFC2079, January 1997,
<http://www.rfc-editor.org/info/rfc2079>.
[RFC2566] deBry, R., Hastings, T., Herriot, R., Isaacson, S., and
P. Powell, "Internet Printing Protocol/1.0: Model and
Semantics", RFC 2566, DOI 10.17487/RFC2566, April 1999,
<http://www.rfc-editor.org/info/rfc2566>.
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[RFC2608] Guttman, E., Perkins, C., Veizades, J., and M. Day,
"Service Location Protocol, Version 2", RFC 2608,
DOI 10.17487/RFC2608, June 1999,
<http://www.rfc-editor.org/info/rfc2608>.
[RFC3712] Fleming, P. and I. McDonald, "Lightweight Directory
Access Protocol (LDAP): Schema for Printer Services",
RFC 3712, DOI 10.17487/RFC3712, February 2004,
<http://www.rfc-editor.org/info/rfc3712>.
[RFC4559] Jaganathan, K., Zhu, L., and J. Brezak, "SPNEGO-based
Kerberos and NTLM HTTP Authentication in Microsoft
Windows", RFC 4559, DOI 10.17487/RFC4559, June 2006,
<http://www.rfc-editor.org/info/rfc4559>.
[SLPPRT20] IANA, "Service Location Protocol, Version 2 (SLPv2)
Templates",
<http://www.iana.org/assignments/svrloc-templates>.
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Appendix A. Changes since RFC 3712
1) Added many editorial corrections and clarifications
- corrected typos, missing words, and ambiguous sentences;
- replaced lowercase 'printer' with titlecase 'Printer' for
readability and consistency with IETF and IEEE-ISTO PWG IPP
standards usage;
- added implementation notes;
- updated and added references.
2) Deleted length restrictions from formal definitions of
DirectoryString syntax attributes
- replaced with notes recommending length restrictions for
compatibility with existing implementations of [RFC3712] and
underlying string length limits in [RFC2707], [RFC2911],
[RFC3805], [PWG5107.2], [PWG5100.13], and [PWG5100.14].
3) Added new Printer attributes defined in [PWG5107.2], [PWG5100.13],
and [PWG5100.14] (see Section 7.1)
- updated the table of Printer attributes and source documents in
Section 4 ("Definition of Attribute Types");
- added support for IEEE-ISTO PWG "IPP Everywhere" [PWG5100.14]
project.
4) Added implementation note to Section 4 about string encodings
- added discussion of 'List of xxx' and 'One of xxx' encodings;
- stated that any of these attributes can be represented as
multiple instances (i.e., to avoid length overflow).
5) Improved comma-delimited examples of string attributes
- added both single-valued and multi-valued examples.
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6) Clarified use of printer-xri-supported and
printer-resolution-supported attributes, and their corresponding
field delimiters
- added note in Section 4 ("Definition of Attribute Types") to
explain the origin of the different field delimiters;
- added examples to show optional *trailing* whitespace after '<'
delimiters in printer-xri-supported;
- added examples to show optional *trailing* whitespace after '>'
delimiters in printer-resolution-supported.
7) Clarified Section 8 ("Internationalization Considerations")
- added note about Net-Unicode [RFC5198] and avoiding use of C0
and C1 control characters.
8) Clarified Section 9 ("Security Considerations")
- added note about security vulnerabilities caused by use of DEL
or any C0 or C1 control characters in names.
9) Clarified terms and abbreviations
- renamed Section 2 ("Conventions Used in This Document");
- added Section 2.1 ("Requirements Language");
- added Section 2.2 ("LDAP Schema Descriptions");
- added Section 2.3 ("Abbreviations").
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Acknowledgments
The authors wish to acknowledge significant contributions from Ken
Jones and Harry Lewis and excellent comments from Patrik Faltstrom,
Ryan Moats, Robert Moore, Lee Rafalow, Kimberly Reger, and Kurt
Zeilenga during the development of the original LDAP Printer schema
[RFC3712].
The authors wish to acknowledge excellent comments from Nevil
Brownlee, Barry Leiba, Alexey Melnikov, Tom Petch, and Mike Sweet
during the development of this current version of the LDAP Printer
schema.
Thanks to the members of the IEEE-ISTO PWG IPP Working Group, for
their review comments and help in preparing this document.
Authors' Addresses
Pat Fleming
Independent
51796 171 Ave.
Pine Island, MN 55963
United States
Phone: +1 507-356-8277
Email: patfleminghtc@gmail.com
Ira McDonald
High North Inc.
221 Ridge Ave.
Grand Marais, MI 49839
United States
Phone: +1 906-494-2434
Email: blueroofmusic@gmail.com
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