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Network Working Group P. Fleming Request for Comments: 3712 IBM Category: Informational I. McDonald High North February 2004 Lightweight Directory Access Protocol (LDAP): Schema for Printer Services Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2004). All Rights Reserved. Abstract This document defines a schema, object classes and attributes, for printers and printer services, for use with directories that support Lightweight Directory Access Protocol v3 (LDAP-TS). This document is based on the printer attributes listed in Appendix E of Internet Printing Protocol/1.1 (IPP) (RFC 2911). A few additional printer attributes are based on definitions in the Printer MIB (RFC 1759). Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Rationale for using DirectoryString Syntax . . . . . . . 3 1.2. Rationale for using caseIgnoreMatch. . . . . . . . . . . 4 1.3. Rationale for using caseIgnoreSubstringsMatch. . . . . . 5 2. Terminology and Conventions. . . . . . . . . . . . . . . . . . 5 3. Definition of Object Classes . . . . . . . . . . . . . . . . . 6 3.1. slpServicePrinter. . . . . . . . . . . . . . . . . . . . 6 3.2. printerAbstract. . . . . . . . . . . . . . . . . . . . . 7 3.3. printerService . . . . . . . . . . . . . . . . . . . . . 8 3.4. printerServiceAuxClass . . . . . . . . . . . . . . . . . 8 3.5. printerIPP . . . . . . . . . . . . . . . . . . . . . . . 8 3.6. printerLPR . . . . . . . . . . . . . . . . . . . . . . . 9 4. Definition of Attribute Types. . . . . . . . . . . . . . . . . 9 4.1. printer-uri. . . . . . . . . . . . . . . . . . . . . . . 11 4.2. printer-xri-supported. . . . . . . . . . . . . . . . . . 11 4.3. printer-name . . . . . . . . . . . . . . . . . . . . . . 13 4.4. printer-natural-language-configured. . . . . . . . . . . 13 Fleming & McDonald Informational [Page 1] RFC 3712 LDAP Schema for Printer Services February 2004 4.5. printer-location . . . . . . . . . . . . . . . . . . . . 14 4.6. printer-info . . . . . . . . . . . . . . . . . . . . . . 14 4.7. printer-more-info. . . . . . . . . . . . . . . . . . . . 14 4.8. printer-make-and-model . . . . . . . . . . . . . . . . . 15 4.9. printer-ipp-versions-supported . . . . . . . . . . . . . 15 4.10. printer-multiple-document-jobs-supported . . . . . . . . 16 4.11. printer-charset-configured . . . . . . . . . . . . . . . 16 4.12. printer-charset-supported. . . . . . . . . . . . . . . . 16 4.13. printer-generated-natural-language-supported . . . . . . 17 4.14. printer-document-format-supported. . . . . . . . . . . . 17 4.15. printer-color-supported. . . . . . . . . . . . . . . . . 18 4.16. printer-compression-supported. . . . . . . . . . . . . . 18 4.17. printer-pages-per-minute . . . . . . . . . . . . . . . . 18 4.18. printer-pages-per-minute-color . . . . . . . . . . . . . 19 4.19. printer-finishings-supported . . . . . . . . . . . . . . 19 4.20. printer-number-up-supported. . . . . . . . . . . . . . . 19 4.21. printer-sides-supported. . . . . . . . . . . . . . . . . 20 4.22. printer-media-supported. . . . . . . . . . . . . . . . . 20 4.23. printer-media-local-supported. . . . . . . . . . . . . . 20 4.24. printer-resolution-supported . . . . . . . . . . . . . . 21 4.25. printer-print-quality-supported. . . . . . . . . . . . . 22 4.26. printer-job-priority-supported . . . . . . . . . . . . . 22 4.27. printer-copies-supported . . . . . . . . . . . . . . . . 22 4.28. printer-job-k-octets-supported . . . . . . . . . . . . . 23 4.29. printer-current-operator . . . . . . . . . . . . . . . . 23 4.30. printer-service-person . . . . . . . . . . . . . . . . . 24 4.31. printer-delivery-orientation-supported . . . . . . . . . 24 4.32. printer-stacking-order-supported . . . . . . . . . . . . 24 4.33. printer-output-features-supported. . . . . . . . . . . . 25 4.34. printer-aliases. . . . . . . . . . . . . . . . . . . . . 25 5. Definition of Syntaxes . . . . . . . . . . . . . . . . . . . . 26 6. Definition of Matching Rules . . . . . . . . . . . . . . . . . 26 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26 7.1. Registration of Object Classes . . . . . . . . . . . . . 26 7.2. Registration of Attribute Types. . . . . . . . . . . . . 27 8. Internationalization Considerations. . . . . . . . . . . . . . 28 9. Security Considerations. . . . . . . . . . . . . . . . . . . . 29 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29 10.1. Normative References . . . . . . . . . . . . . . . . . . 29 10.2. Informative References . . . . . . . . . . . . . . . . . 30 11. Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . 32 12. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 32 13. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 33 Fleming & McDonald Informational [Page 2] RFC 3712 LDAP Schema for Printer Services February 2004 1. Introduction This document defines several object classes to provide Lightweight Directory Access Protocol v3 [LDAP-TS] applications with flexible options in defining printer information using LDAP schema. Classes are provided for defining directory entries with common printer information as well as for extending existing directory entries with SLPv2 [RFC2608], IPP/1.1 [RFC2911], and LPR [RFC1179] specific information. The schema defined in this document is based on the printer attributes listed in Appendix E 'Generic Directory Schema' of Internet Printing Protocol/1.1 (IPP) [RFC2911]. A few additional printer attributes are based on definitions in the Printer MIB [RFC1759]. The schema defined in this document is technically aligned with the stable IANA-registered 'service:printer:' v2.0 template [SLP-PRT], for compatibility with already deployed Service Location Protocol (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' [RFC2252] rather than 'labeledURI' [RFC2079] for the 'printer-uri' attribute). Please send comments directly to the authors at the addresses listed in Section 13 "Authors' Addresses". 1.1. Rationale for using DirectoryString Syntax The attribute syntax 'DirectoryString' (UTF-8 [RFC2279]) defined in [RFC2252] is specified for several groups of string attributes that are defined in this document: 1) URI - printer-uri, printer-xri-supported, printer-more-info The UTF-8 encoding is forward compatible with any future deployment of (UTF-8 based) IRI (Internationalized Resource Identifiers) [W3C-IRI] currently being developed by the W3C Internationalization Working Group. 2) Description - printer-name, printer-location, printer-info, printer-make-and-model Fleming & McDonald Informational [Page 3] RFC 3712 LDAP Schema for Printer Services February 2004 The UTF-8 encoding supports descriptions in any language, conformant with the "IETF Policy on Character Sets and Languages" [RFC2277]. Note: The printer-natural-language-configured attribute contains a language tag [RFC3066] for these description attributes (for example, to support text-to-speech conversions). 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' which 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. 1.2. Rationale for using caseIgnoreMatch The EQUALITY matching rule 'caseIgnoreMatch' defined in [RFC2252] 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 [RFC2396], 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 [RFC1274]. Either equality matching rule choice would be a compromise: a) case sensitive whole URI matching may 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); Fleming & McDonald Informational [Page 4] RFC 3712 LDAP Schema for Printer Services February 2004 b) case insensitive whole URI matching may 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). 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. 1.3. Rationale for using caseIgnoreSubstringsMatch The SUBSTR matching rule 'caseIgnoreSubstringsMatch' defined in [RFC2252] 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 [RFC1274]. 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. 2. Terminology and Conventions 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 BCP 14 [RFC2119]. Schema definitions are provided using LDAPv3 [LDAP-TS] description formats. Definitions provided here are formatted (line wrapped) for readability. Fleming & McDonald Informational [Page 5] RFC 3712 LDAP Schema for Printer Services February 2004 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 may 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 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 [SLP-PRT]. 3.1. slpServicePrinter ( 1.3.18.0.2.6.254 NAME 'slpServicePrinter' DESC 'Service Location Protocol (SLP) information.' AUXILIARY SUP slpService ) Fleming & McDonald Informational [Page 6] RFC 3712 LDAP Schema for Printer Services February 2004 This auxiliary class defines Service Location Protocol (SLPv2) [RFC2608] specific information. It should be used with a structural class such as printerService. It may be used to create new or extend existing directory entries with SLP 'service:printer' abstract service type information as defined in [SLP-PRT]. 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 $ printer-current-operator $ printer-service-person $ printer-delivery-orientation-supported $ printer-stacking-order-supported $ printer-output-features-supported ) ) 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. Fleming & McDonald Informational [Page 7] RFC 3712 LDAP Schema for Printer Services February 2004 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 protocol, service or operating system specific information. Note: When extending other structural classes with auxiliary classes, printerService should not be used. 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. This class should be used with a structural class. 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-multiple-document-jobs-supported ) ) Fleming & McDonald Informational [Page 8] RFC 3712 LDAP Schema for Printer Services February 2004 This auxiliary class defines Internet Printing Protocol (IPP/1.1) [RFC2911] information. It should be used with a structural class such as printerService. It is used to extend structural classes with IPP specific printer information. 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 should be used with a structural class such as printerService. It is used to identify directory entries that support LPR. 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 6 of [RFC2252] (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 8 of [RFC2252] and/or Section 2 of [RFC3698] (see Section 6 'Definition of Matching Rules' below). The following table is a summary of the attribute names defined by this document and their corresponding names from [RFC2911]. Some attribute names described in [RFC2911] have been prefixed with 'printer-' as recommended in [RFC2926], to address the flat namespace for LDAP identifiers. Fleming & McDonald Informational [Page 9] RFC 3712 LDAP Schema for Printer Services February 2004 LDAP & SLP Printer Schema IPP Model [RFC2911] ------------------------------ ------------------------------------- printer-uri printer-xri-supported [IPP printer-uri-supported] [IPP uri-authentication-supported] [IPP 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 printer-current-operator printer-service-person printer-delivery-orientation-supported printer-stacking-order-supported printer-output-features-supported printer-aliases Fleming & McDonald Informational [Page 10] RFC 3712 LDAP Schema for Printer Services February 2004 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 should be listed in printer-xri-supported. Values of URI should conform to [RFC2396], although URI schemes may be defined which do not conform to [RFC2396] (see [RFC2717] and [RFC2718]). 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: 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 1.1, 1.2, and 1.3 for rationale for design choices. 4.2. printer-xri-supported ( 1.3.18.0.2.4.1107 NAME 'printer-xri-supported' DESC 'The unordered list of XRI (extended resource identifiers) supported by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 ) A list of XRI (extended resource identifiers) supported by this printer. Each value of this list should consist of a URI (uniform resource identifier) followed by (optional) authentication and security fields. Values of URI should conform to [RFC2396], although URI schemes may be defined which do not conform to [RFC2396] (see [RFC2717] and [RFC2718]). Fleming & McDonald Informational [Page 11] RFC 3712 LDAP Schema for Printer Services February 2004 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 'printer-uri-supported', 'uri- authentication-supported', and `'uri-security-supported' (called the 'Three Musketeers' because they are parallel ordered attributes) defined in IPP/1.1 [RFC2911]. 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], 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]) 'digest' (HTTP/1.1 Basic, [RFC2617]) 'certificate' (from certificate) A missing 'sec' field should be interpreted to mean 'none'. Per IPP/1.1 [RFC2911], defined values of the 'sec' field include: 'none' (no security for this URI) 'ssl3' (Netscape SSL3) 'tls' (IETF TLS/1.0, [RFC2246]) Each XRI field should be delimited by '<'. For example: 'uri=ipp://foo.com< auth=digest< sec=tls<' 'uri=lpr://bar.com< auth=none< sec=none<' 'uri=mailto:printer@foobar.com< auth=none< sec=none<' Note: The syntax and delimiter for this attribute are aligned with the equivalent attribute in the 'service:printer:' v2.0 template [SLP-PRT]. Whitespace is permitted after (but not before) the delimiter '<'. Note that this delimiter differs from printer- resolution-supported. Note: See Sections 1.1, 1.2, and 1.3 for rationale for design choices. Fleming & McDonald Informational [Page 12] RFC 3712 LDAP Schema for Printer Services February 2004 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{127} 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. This name may be the last part of the printer's URI or it may be completely unrelated. This name may contain characters that are not allowed in a conventional URI (see [RFC2396]). 4.4. printer-natural-language-configured ( 1.3.18.0.2.4.1119 NAME 'printer-natural-language-configured' DESC 'The configured natural language in which error and status messages will be generated (by default) by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{127} SINGLE-VALUE ) Also, a possible natural language for printer 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 should conform to "Tags for the Identification of Languages" [RFC3066]. For example: 'en-us' (English as spoken in the US) 'fr-fr' (French as spoken in France) For consistency with IPP/1.1 [RFC2911], language tags in this attribute should be lowercase normalized. Fleming & McDonald Informational [Page 13] RFC 3712 LDAP Schema for Printer Services February 2004 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{127} SINGLE-VALUE ) For example: 'Room 123A' 'Second floor of building XYZ' 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{127} 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' 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 ) Fleming & McDonald Informational [Page 14] RFC 3712 LDAP Schema for Printer Services February 2004 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. Values of URI should conform to [RFC2396], although URI schemes may be defined which do not conform to [RFC2396] (see [RFC2717] and [RFC2718]). 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 1.1, 1.2, and 1.3 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{127} SINGLE-VALUE ) Note: The printer manufacturer may initially populate this attribute. 4.9. printer-ipp-versions-supported ( 1.3.18.0.2.4.1133 NAME 'printer-ipp-versions-supported' DESC 'IPP protocol version(s) that this printer supports.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{127} ) The IPP protocol version(s) should include major and minor versions, i.e., the exact version numbers for which this Printer implementation meets the IPP version-specific conformance requirements. Fleming & McDonald Informational [Page 15] RFC 3712 LDAP Schema for Printer Services February 2004 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 in which error and status messages will be generated (by default) by this printer.' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{63} SINGLE-VALUE ) Also, a possible charset for printer string attributes set by operator, system administrator, or manufacturer. For example: 'utf-8' (ISO 10646/Unicode in UTF-8 transform [RFC2279]) 'iso-8859-1' (Latin1) Values of charset tags should be defined in the IANA Registry of Coded Character Sets [IANA-CHAR] (see also [RFC2978]) and the '(preferred MIME name)' should be used as the charset tag in this attribute. For consistency with IPP/1.1 [RFC2911], charset tags in this attribute should be lowercase normalized. 4.12. printer-charset-supported ( 1.3.18.0.2.4.1131 NAME 'printer-charset-supported' DESC 'Set of charsets supported for the attribute values of syntax DirectoryString for this directory entry.' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{63} ) Fleming & McDonald Informational [Page 16] RFC 3712 LDAP Schema for Printer Services February 2004 For example: 'utf-8' (ISO 10646/Unicode in UTF-8 transform [RFC2279]) 'iso-8859-1' (Latin1) Values of charset tags should be defined in the IANA Registry of Coded Character Sets [IANA-CHAR] (see also [RFC2978]) and the '(preferred MIME name)' should be used as the charset tag in this attribute. For consistency 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 'Natural language(s) supported for this directory entry.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{63} ) Values of language tags should conform to "Tags for the Identification of Languages" [RFC3066]. For example: 'en-us' (English as spoken in the US) 'fr-fr' (French as spoken in France) For consistency 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 'The possible source document formats which may be interpreted and printed by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{127} ) Values of document formats should be MIME media types defined in the IANA Registry of MIME Media Types [IANA-MIME] (see also [RFC2048]). Fleming & McDonald Informational [Page 17] RFC 3712 LDAP Schema for Printer Services February 2004 4.15. printer-color-supported ( 1.3.18.0.2.4.1129 NAME 'printer-color-supported' DESC 'Indicates whether 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 ) 4.16. printer-compression-supported ( 1.3.18.0.2.4.1128 NAME 'printer-compression-supported' DESC 'Compression algorithms supported by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{255} ) Values defined in IPP/1.1 [RFC2911] 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 which may 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. Fleming & McDonald Informational [Page 18] RFC 3712 LDAP Schema for Printer Services February 2004 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 which may 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 'The possible finishing operations supported by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{255} ) Values defined in IPP/1.1 [RFC2911] 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'. 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 'The possible numbers of print-stream pages to impose upon a single side of an instance of a selected medium.' EQUALITY integerMatch ORDERING integerOrderingMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 ) Fleming & McDonald Informational [Page 19] RFC 3712 LDAP Schema for Printer Services February 2004 Values defined in IPP/1.1 [RFC2911] include: '1', '2', and '4'. Note: Implementations may support other values. 4.21. printer-sides-supported ( 1.3.18.0.2.4.1123 NAME 'printer-sides-supported' DESC 'The number 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{127} ) Values defined in IPP/1.1 [RFC2911] include: '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 'The standard names/types/sizes (and optional color suffixes) of the media supported by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{255} ) Values are defined in IPP/1.1 [RFC2911] or any IANA registered extensions. For example: 'iso-a4' 'envelope' 'na-letter-white' 4.23. printer-media-local-supported ( 1.3.18.0.2.4.1117 NAME 'printer-media-local-supported' DESC 'Site-specific names of media supported by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{255} ) Values should be in the natural language specified by printer- natural-language-configured. Fleming & McDonald Informational [Page 20] RFC 3712 LDAP Schema for Printer Services February 2004 For example: 'purchasing-form' (site-specific name) as opposed to 'na-letter' (standard keyword from IPP/1.1 [RFC2911]) in the printer-media-supported attribute. 4.24. printer-resolution-supported ( 1.3.18.0.2.4.1121 NAME 'printer-resolution-supported' DESC 'List of resolutions supported for printing documents by this printer.' EQUALITY caseIgnoreMatch SUBSTR caseIgnoreSubstringsMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{255} ) Each resolution value should be a string containing 3 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 should be delimited by '>'. For example: '300> 300> dpi>' '600> 600> dpi>' Note: This attribute is based on 'printer-resolution-supported' defined in IPP/1.1 [RFC2911] (which has a binary complex encoding) derived from 'prtMarkerAddressabilityFeedDir', 'prtMarkerAddressabilityXFeedDir', and 'prtMarkerAddressabilityUnit' defined in the Printer MIB [RFC1759] (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 [SLP-PRT]. Whitespace is permitted after (but not before) the delimiter '>'. Note that this delimiter differs from printer-xri- supported. Fleming & McDonald Informational [Page 21] RFC 3712 LDAP Schema for Printer Services February 2004 4.25. printer-print-quality-supported ( 1.3.18.0.2.4.1120 NAME 'printer-print-quality-supported' DESC '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{127} ) Values defined in IPP/1.1 [RFC2911] include: 'unknown' 'draft' 'normal' 'high' 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 may 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 ) Fleming & McDonald Informational [Page 22] RFC 3712 LDAP Schema for Printer Services February 2004 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 [SLP- PRT]. 4.28. printer-job-k-octets-supported ( 1.3.18.0.2.4.1111 NAME 'printer-job-k-octets-supported' DESC 'The maximum size in kilobytes (1,024 octets actually) incoming print job that this printer will accept.' 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 [SLP- PRT]. 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{127} SINGLE-VALUE ) The value of this attribute should include information that would enable other humans to reach the operator, such as a telephone number. Fleming & McDonald Informational [Page 23] RFC 3712 LDAP Schema for Printer Services February 2004 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{127} 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. 4.31. printer-delivery-orientation-supported ( 1.3.18.0.2.4.1114 NAME 'printer-delivery-orientation-supported' DESC 'The possible delivery orientations of pages as they are printed and ejected from this printer.' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{127} ) Values defined include: 'unknown' 'face-up' 'face-down' Note: The syntax and values for this attribute are aligned with the equivalent attribute in the 'service:printer:' v2.0 template [SLP- PRT]. 4.32. printer-stacking-order-supported ( 1.3.18.0.2.4.1115 NAME 'printer-stacking-order-supported' DESC 'The possible stacking order of pages as they are printed and ejected from this printer.' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{127} ) Fleming & McDonald Informational [Page 24] RFC 3712 LDAP Schema for Printer Services February 2004 Values defined include: 'unknown' 'first-to-last' 'last-to-first' Note: The syntax and values for this attribute are aligned with the equivalent attribute in the 'service:printer:' v2.0 template [SLP- PRT]. 4.33. printer-output-features-supported ( 1.3.18.0.2.4.1116 NAME 'printer-output-features-supported' DESC 'The possible output features supported by this printer.' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{127} ) Values defined include: 'unknown' 'bursting' 'decollating' 'page-collating' 'offset-stacking' Note: The syntax and values for this attribute are aligned with the equivalent attribute in the 'service:printer:' v2.0 template [SLP- PRT]. Note: Implementations may support other values. 4.34. printer-aliases ( 1.3.18.0.2.4.1108 NAME 'printer-aliases' DESC 'List of 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{127} ) 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. Fleming & McDonald Informational [Page 25] RFC 3712 LDAP Schema for Printer Services February 2004 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 6 of [RFC2252], 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 [RFC2279]) 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 8 of [RFC2252] and/or Section 2 of [RFC3698], 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 does define the following Object Identifier Descriptors. They have been registered by the IANA: 7.1. Registration of Object Classes Subject: Request for LDAP Descriptor Registration Descriptor (short name): see table below Object Identifier: see table below Person & email address to contact for further information: see below Usage: object class Fleming & McDonald Informational [Page 26] RFC 3712 LDAP Schema for Printer Services February 2004 Specification: RFC3712 Author/Change Controller: Pat Fleming IBM Highway 52 N Rochester, MN 55901 USA Phone: +1 507-253-7583 EMail: flemingp@us.ibm.com Comments: 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 7.2. Registration of Attribute Types Subject: Request for LDAP 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: RFC3712 Author/Change Controller: Pat Fleming IBM Highway 52 N Rochester, MN 55901 USA Phone: +1 507-253-7583 EMail: flemingp@us.ibm.com Fleming & McDonald Informational [Page 27] RFC 3712 LDAP Schema for Printer Services February 2004 Comments: 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 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 [RFC2279], as required by [RFC2252]. A language tag [RFC3066] for all of the text string attributes defined in this document is contained in the printer-natural- language-configured attribute. Fleming & McDonald Informational [Page 28] RFC 3712 LDAP Schema for Printer Services February 2004 Therefore, all object classes defined in this document conform to the "IETF Policy on Character Sets and Languages" [RFC2277]. 9. Security Considerations See [RFC2829] for detailed guidance on authentication methods for LDAP. See [RFC2830] for detailed guidance of using TLS/1.0 [RFC2246] 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. For additional security considerations of deploying printers in an IPP environment, see Section 8 of [RFC2911]. 10. References 10.1. Normative References [IANA-CHAR] IANA Registry of Character Sets http://www.iana.org/assignments/charset-reg/... [IANA-MIME] IANA Registry of MIME Media Types http://www.iana.org/assignments/media-types/... [LDAP-TS] Hodges, J. and R. Morgan, "Lightweight Directory Access Protocol (v3): Technical Specification", RFC 3377, September 2002. [RFC1274] Barker, P. and S. Kille, "The COSINE and Internet X.500 Schema", RFC 1274, November 1991. [RFC1759] Smith, R., Wright, F., Hastings, T., Zilles, S. and J. Gyllenskog, "Printer MIB", RFC 1759, March 1995. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC2252] Wahl, M., Coulbeck, T., Howes, T. and S. Kille, "Lightweight Directory Access Protocol (v3): Attribute Syntax Definitions", RFC 2252, December 1997. Fleming & McDonald Informational [Page 29] RFC 3712 LDAP Schema for Printer Services February 2004 [RFC2396] Berners-Lee. T., Fielding, R. and L. Masinter, "URI Generic Syntax", RFC 2396, August 1998. [RFC2829] Wahl, M., Alvestrand, H., Hodges, J. and R. Morgan, "Authentication Methods for LDAP", RFC 2829, May 2000. [RFC2830] Hodges, J., Morgan, R. and M. Wahl, "Lightweight Directory Access Protocol (v3): Extension for Transport Layer Security", RFC 2830, May 2000. [RFC2911] Hastings, T., Ed.., Herrito, R., deBry, R., Isaacson, S. and P. Powell, "Internet Printing Protocol/1.1: Model and Semantics", RFC 2911, September 2000. [RFC2926] Kempf, J., Moats, R. and P. St. Pierre, "Conversion of LDAP Schemas to and from SLP Templates", RFC 2926, September 2000. [RFC3066] Alvestrand, H., "Tags for the Identification of Languages", BCP 47, RFC 3066, January 2001. [RFC3698] Zeilenga, K., Ed., "Lightweight Directory Access Protocol (LDAP): Additional Matching Rules", RFC 3698, February 2004. 10.2. Informative References [IANA-SLPT] IANA Registry of SLP Templates http://www.iana.org/assignments/svrloc-templates/... [RFC1179] McLaughlin, L., "Line Printer Daemon Protocol", RFC 1179, August 1990. [RFC1951] Deutsch, P., "DEFLATE Compressed Data Format Specification Version 1.3", RFC 1951, May 1996. [RFC1952] Deutsch, P., "GZIP File Format Specification Version 4.3", RFC 1952, May 1996. [RFC1977] Schryver, V., "PPP BSD Compression Protocol", RFC 1977, August 1996. [RFC2048] Freed, N., Klensin, J. and J. Postel, "Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures", BCP 13, RFC 2048, November 1996. Fleming & McDonald Informational [Page 30] RFC 3712 LDAP Schema for Printer Services February 2004 [RFC2079] Smith, M., "Definition of an X.500 Attribute Type and an Object Class to Hold Uniform Resource Identifiers (URIs)", RFC 2079, January 1997. [RFC2246] Dierks, T. and C. Allen, "TLS Protocol Version 1.0", RFC 2246, January 1999. [RFC2277] Alvestrand, H., "IETF Policy on Character Sets and Languages", RFC 2277, January 1998. [RFC2279] Yergeau, F., "UTF-8, a Transformation Format of ISO 10646", RFC 2279, January 1998. [RFC2608] Guttman, E., Perkins, C., Veizades, J. and M. Day, "Service Location Protocol v2", RFC 2608, June 1999. [RFC2609] Guttman, E., Perkins, C. and J. Kempf, "Service Templates and Service: Schemes", RFC 2609, June 1999. [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, June 1999. [RFC2717] Petke, R. and I. King, "Registration Procedures for URL Scheme Names", RFC 2717, November 1999. [RFC2718] Masinter, L., Alvestrand, H., Zigmond, D. and R. Petke, "Guidelines for new URL Schemes", BCP 19, RFC 2718, November 1999. [RFC2978] Freed, N. and J.Postel, "IANA Charset Registration Procedures", RFC2978, October 2000. [SLP-PRT] St. Pierre, Isaacson, McDonald. Definition of the Printer Abstract Service Type v2.0, <durable URL below>, May 2000. Reviewed and approved by IETF SLP Designated Expert, according to Section 5 'IANA Considerations' in [RFC2609]. Archived in the IANA Registry of SLP Templates [IANA- SLPT] at: http://www.iana.org/assignments/svrloc- templates/printer.2.0.en [W3C-IRI] Duerst, Suignard, "Internationalized Resource Identifiers (IRI), Work in Progress. Fleming & McDonald Informational [Page 31] RFC 3712 LDAP Schema for Printer Services February 2004 11. Acknowledgments The editors wish to acknowledge the very significant contributions of Ken Jones (Bytemobile) and Harry Lewis (IBM) during the development of this document. Thanks to Patrik Faltstrom (Cisco), Ryan Moats (Lemur Networks), Robert Moore (IBM), Lee Rafalow (IBM), Kimberly Reger (IBM), Kurt Zeilenga (OpenLDAP), and the members of the IETF IPP Working Group, for review comments and help in preparing this document. 12. Authors' Addresses Please send comments to the authors at the addresses listed below. Pat Fleming IBM Highway 52 N Rochester, MN 55901 USA Phone: +1 507-253-7583 EMail: flemingp@us.ibm.com Ira McDonald High North Inc 221 Ridge Ave Grand Marais, MI 49839 USA Phone: +1 906-494-2434 Email: imcdonald@sharplabs.com Fleming & McDonald Informational [Page 32] RFC 3712 LDAP Schema for Printer Services February 2004 13. Full Copyright Statement Copyright (C) The Internet Society (2004). This document is subject to the rights, licenses and restrictions contained in BCP 78 and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Intellectual Property The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society. Fleming & McDonald Informational [Page 33] Back

Edit File : rfc3712.txt | Size : 60.84 KB

Network Working Group                                         P. Fleming
Request for Comments: 3712                                           IBM
Category: Informational                                      I. McDonald
                                                              High North
                                                           February 2004

Lightweight Directory Access Protocol (LDAP):
                      Schema for Printer Services

Status of this Memo

This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Abstract

This document defines a schema, object classes and attributes, for
   printers and printer services, for use with directories that support
   Lightweight Directory Access Protocol v3 (LDAP-TS).  This document is
   based on the printer attributes listed in Appendix E of Internet
   Printing Protocol/1.1 (IPP) (RFC 2911).  A few additional printer
   attributes are based on definitions in the Printer MIB (RFC 1759).

Table of Contents

1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
       1.1.  Rationale for using DirectoryString Syntax . . . . . . .  3
       1.2.  Rationale for using caseIgnoreMatch. . . . . . . . . . .  4
       1.3.  Rationale for using caseIgnoreSubstringsMatch. . . . . .  5
   2.  Terminology and Conventions. . . . . . . . . . . . . . . . . .  5
   3.  Definition of Object Classes . . . . . . . . . . . . . . . . .  6
       3.1.  slpServicePrinter. . . . . . . . . . . . . . . . . . . .  6
       3.2.  printerAbstract. . . . . . . . . . . . . . . . . . . . .  7
       3.3.  printerService . . . . . . . . . . . . . . . . . . . . .  8
       3.4.  printerServiceAuxClass . . . . . . . . . . . . . . . . .  8
       3.5.  printerIPP . . . . . . . . . . . . . . . . . . . . . . .  8
       3.6.  printerLPR . . . . . . . . . . . . . . . . . . . . . . .  9
   4.  Definition of Attribute Types. . . . . . . . . . . . . . . . .  9
       4.1.  printer-uri. . . . . . . . . . . . . . . . . . . . . . . 11
       4.2.  printer-xri-supported. . . . . . . . . . . . . . . . . . 11
       4.3.  printer-name . . . . . . . . . . . . . . . . . . . . . . 13
       4.4.  printer-natural-language-configured. . . . . . . . . . . 13

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RFC 3712            LDAP Schema for Printer Services       February 2004

4.5.  printer-location . . . . . . . . . . . . . . . . . . . . 14
       4.6.  printer-info . . . . . . . . . . . . . . . . . . . . . . 14
       4.7.  printer-more-info. . . . . . . . . . . . . . . . . . . . 14
       4.8.  printer-make-and-model . . . . . . . . . . . . . . . . . 15
       4.9.  printer-ipp-versions-supported . . . . . . . . . . . . . 15
       4.10. printer-multiple-document-jobs-supported . . . . . . . . 16
       4.11. printer-charset-configured . . . . . . . . . . . . . . . 16
       4.12. printer-charset-supported. . . . . . . . . . . . . . . . 16
       4.13. printer-generated-natural-language-supported . . . . . . 17
       4.14. printer-document-format-supported. . . . . . . . . . . . 17
       4.15. printer-color-supported. . . . . . . . . . . . . . . . . 18
       4.16. printer-compression-supported. . . . . . . . . . . . . . 18
       4.17. printer-pages-per-minute . . . . . . . . . . . . . . . . 18
       4.18. printer-pages-per-minute-color . . . . . . . . . . . . . 19
       4.19. printer-finishings-supported . . . . . . . . . . . . . . 19
       4.20. printer-number-up-supported. . . . . . . . . . . . . . . 19
       4.21. printer-sides-supported. . . . . . . . . . . . . . . . . 20
       4.22. printer-media-supported. . . . . . . . . . . . . . . . . 20
       4.23. printer-media-local-supported. . . . . . . . . . . . . . 20
       4.24. printer-resolution-supported . . . . . . . . . . . . . . 21
       4.25. printer-print-quality-supported. . . . . . . . . . . . . 22
       4.26. printer-job-priority-supported . . . . . . . . . . . . . 22
       4.27. printer-copies-supported . . . . . . . . . . . . . . . . 22
       4.28. printer-job-k-octets-supported . . . . . . . . . . . . . 23
       4.29. printer-current-operator . . . . . . . . . . . . . . . . 23
       4.30. printer-service-person . . . . . . . . . . . . . . . . . 24
       4.31. printer-delivery-orientation-supported . . . . . . . . . 24
       4.32. printer-stacking-order-supported . . . . . . . . . . . . 24
       4.33. printer-output-features-supported. . . . . . . . . . . . 25
       4.34. printer-aliases. . . . . . . . . . . . . . . . . . . . . 25
   5.  Definition of Syntaxes . . . . . . . . . . . . . . . . . . . . 26
   6.  Definition of Matching Rules . . . . . . . . . . . . . . . . . 26
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 26
       7.1.  Registration of Object Classes . . . . . . . . . . . . . 26
       7.2.  Registration of Attribute Types. . . . . . . . . . . . . 27
   8.  Internationalization Considerations. . . . . . . . . . . . . . 28
   9.  Security Considerations. . . . . . . . . . . . . . . . . . . . 29
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
       10.1. Normative References . . . . . . . . . . . . . . . . . . 29
       10.2. Informative References . . . . . . . . . . . . . . . . . 30
   11. Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . 32
   12. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 32
   13. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 33

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RFC 3712            LDAP Schema for Printer Services       February 2004

1.  Introduction

This document defines several object classes to provide Lightweight
   Directory Access Protocol v3 [LDAP-TS] applications with flexible
   options in defining printer information using LDAP schema.  Classes
   are provided for defining directory entries with common printer
   information as well as for extending existing directory entries with
   SLPv2 [RFC2608], IPP/1.1 [RFC2911], and LPR [RFC1179] specific
   information.

The schema defined in this document is based on the printer
   attributes listed in Appendix E 'Generic Directory Schema' of
   Internet Printing Protocol/1.1 (IPP) [RFC2911].  A few additional
   printer attributes are based on definitions in the Printer MIB
   [RFC1759].

The schema defined in this document is technically aligned with the
   stable IANA-registered 'service:printer:' v2.0 template [SLP-PRT],
   for compatibility with already deployed Service Location Protocol
   (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' [RFC2252] rather than
   'labeledURI' [RFC2079] for the 'printer-uri' attribute).

Please send comments directly to the authors at the addresses listed
   in Section 13 "Authors' Addresses".

1.1.  Rationale for using DirectoryString Syntax

The attribute syntax 'DirectoryString' (UTF-8 [RFC2279]) defined in
   [RFC2252] is specified for several groups of string attributes that
   are defined in this document:

1)  URI
       - printer-uri, printer-xri-supported, printer-more-info

The UTF-8 encoding is forward compatible with any future
       deployment of (UTF-8 based) IRI (Internationalized Resource
       Identifiers) [W3C-IRI] currently being developed by the W3C
       Internationalization Working Group.

2)  Description
       - printer-name, printer-location, printer-info,
       printer-make-and-model

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RFC 3712            LDAP Schema for Printer Services       February 2004

The UTF-8 encoding supports descriptions in any language,
       conformant with the "IETF Policy on Character Sets and Languages"
       [RFC2277].

Note:  The printer-natural-language-configured attribute contains
       a language tag [RFC3066] for these description attributes (for
       example, to support text-to-speech conversions).

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' which 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.

1.2.  Rationale for using caseIgnoreMatch

The EQUALITY matching rule 'caseIgnoreMatch' defined in [RFC2252] 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 [RFC2396], 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 [RFC1274].

Either equality matching rule choice would be a compromise:
       a) case sensitive whole URI matching may 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);

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RFC 3712            LDAP Schema for Printer Services       February 2004

b) case insensitive whole URI matching may 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).

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.

1.3.  Rationale for using caseIgnoreSubstringsMatch

The SUBSTR matching rule 'caseIgnoreSubstringsMatch' defined in
   [RFC2252] 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 [RFC1274].

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.

2.  Terminology and Conventions

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 BCP 14 [RFC2119].

Schema definitions are provided using LDAPv3 [LDAP-TS] description
   formats.  Definitions provided here are formatted (line wrapped) for
   readability.

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RFC 3712            LDAP Schema for Printer Services       February 2004

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 may 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 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 [SLP-PRT].

3.1.  slpServicePrinter

( 1.3.18.0.2.6.254
   NAME  'slpServicePrinter'
   DESC  'Service Location Protocol (SLP) information.'
   AUXILIARY
   SUP   slpService
   )

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RFC 3712            LDAP Schema for Printer Services       February 2004

This auxiliary class defines Service Location Protocol (SLPv2)
   [RFC2608] specific information.  It should be used with a structural
   class such as printerService.  It may be used to create new or extend
   existing directory entries with SLP 'service:printer' abstract
   service type information as defined in [SLP-PRT].  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 $ printer-current-operator $
           printer-service-person $
           printer-delivery-orientation-supported $
           printer-stacking-order-supported $
           printer-output-features-supported )
   )

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.

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RFC 3712            LDAP Schema for Printer Services       February 2004

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 protocol, service or
   operating system specific information.

Note:  When extending other structural classes with auxiliary
   classes, printerService should not be used.

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.
   This class should be used with a structural class.

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-multiple-document-jobs-supported )
   )

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RFC 3712            LDAP Schema for Printer Services       February 2004

This auxiliary class defines Internet Printing Protocol (IPP/1.1)
   [RFC2911] information.  It should be used with a structural class
   such as printerService.  It is used to extend structural classes with
   IPP specific printer information.

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 should be
   used with a structural class such as printerService.  It is used to
   identify directory entries that support LPR.

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 6 of [RFC2252] (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 8 of [RFC2252] and/or Section 2 of [RFC3698]
   (see Section 6 'Definition of Matching Rules' below).

The following table is a summary of the attribute names defined by
   this document and their corresponding names from [RFC2911].  Some
   attribute names described in [RFC2911] have been prefixed with
   'printer-' as recommended in [RFC2926], to address the flat namespace
   for LDAP identifiers.

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RFC 3712            LDAP Schema for Printer Services       February 2004

LDAP & SLP Printer Schema       IPP Model [RFC2911]
   ------------------------------  -------------------------------------
   printer-uri
   printer-xri-supported
                                   [IPP printer-uri-supported]
                                   [IPP uri-authentication-supported]
                                   [IPP 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
   printer-current-operator
   printer-service-person
   printer-delivery-orientation-supported
   printer-stacking-order-supported
   printer-output-features-supported
   printer-aliases

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RFC 3712            LDAP Schema for Printer Services       February 2004

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 should be listed in printer-xri-supported.

Values of URI should conform to [RFC2396], although URI schemes may
   be defined which do not conform to [RFC2396] (see [RFC2717] and
   [RFC2718]).

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:  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 1.1, 1.2, and 1.3 for rationale for design
   choices.

4.2.  printer-xri-supported

( 1.3.18.0.2.4.1107
   NAME 'printer-xri-supported'
   DESC 'The unordered list of XRI (extended resource identifiers)
         supported by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
   )

A list of XRI (extended resource identifiers) supported by this
   printer.  Each value of this list should consist of a URI (uniform
   resource identifier) followed by (optional) authentication and
   security fields.

Values of URI should conform to [RFC2396], although URI schemes may
   be defined which do not conform to [RFC2396] (see [RFC2717] and
   [RFC2718]).

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RFC 3712            LDAP Schema for Printer Services       February 2004

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 'printer-uri-supported', 'uri-
   authentication-supported', and `'uri-security-supported' (called the
   'Three Musketeers' because they are parallel ordered attributes)
   defined in IPP/1.1 [RFC2911].  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], 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])
       'digest' (HTTP/1.1 Basic, [RFC2617])
       'certificate' (from certificate)

A missing 'sec' field should be interpreted to mean 'none'.  Per
   IPP/1.1 [RFC2911], defined values of the 'sec' field include:

'none' (no security for this URI)
       'ssl3' (Netscape SSL3)
       'tls' (IETF TLS/1.0, [RFC2246])

Each XRI field should be delimited by '<'.  For example:

'uri=ipp://foo.com< auth=digest< sec=tls<'
       'uri=lpr://bar.com< auth=none< sec=none<'
       'uri=mailto:printer@foobar.com< auth=none< sec=none<'

Note:  The syntax and delimiter for this attribute are aligned with
   the equivalent attribute in the 'service:printer:' v2.0 template
   [SLP-PRT].  Whitespace is permitted after (but not before) the
   delimiter '<'.  Note that this delimiter differs from printer-
   resolution-supported.

Note:  See Sections 1.1, 1.2, and 1.3 for rationale for design
   choices.

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RFC 3712            LDAP Schema for Printer Services       February 2004

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{127}
   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.  This name may be the last part of the
   printer's URI or it may be completely unrelated.  This name may
   contain characters that are not allowed in a conventional URI (see
   [RFC2396]).

4.4.  printer-natural-language-configured

( 1.3.18.0.2.4.1119
   NAME 'printer-natural-language-configured'
   DESC 'The configured natural language in which error and status
         messages will be generated (by default) by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{127}
   SINGLE-VALUE
   )

Also, a possible natural language for printer 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 should conform to "Tags for the
   Identification of Languages" [RFC3066].  For example:

'en-us' (English as spoken in the US)
       'fr-fr' (French as spoken in France)

For consistency with IPP/1.1 [RFC2911], language tags in this
   attribute should be lowercase normalized.

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RFC 3712            LDAP Schema for Printer Services       February 2004

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{127}
   SINGLE-VALUE
   )

For example:

'Room 123A'
       'Second floor of building XYZ'

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{127}
   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'

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
   )

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RFC 3712            LDAP Schema for Printer Services       February 2004

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.

Values of URI should conform to [RFC2396], although URI schemes may
   be defined which do not conform to [RFC2396] (see [RFC2717] and
   [RFC2718]).

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 1.1, 1.2, and 1.3 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{127}
   SINGLE-VALUE
   )

Note:  The printer manufacturer may initially populate this
   attribute.

4.9.  printer-ipp-versions-supported

( 1.3.18.0.2.4.1133
   NAME 'printer-ipp-versions-supported'
   DESC 'IPP protocol version(s) that this printer supports.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{127}
   )

The IPP protocol version(s) should include major and minor versions,
   i.e., the exact version numbers for which this Printer implementation
   meets the IPP version-specific conformance requirements.

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RFC 3712            LDAP Schema for Printer Services       February 2004

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 in which error and status messages will
         be generated (by default) by this printer.'
   EQUALITY caseIgnoreMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{63}
   SINGLE-VALUE
   )

Also, a possible charset for printer string attributes set by
   operator, system administrator, or manufacturer.  For example:

'utf-8' (ISO 10646/Unicode in UTF-8 transform [RFC2279])
       'iso-8859-1' (Latin1)

Values of charset tags should be defined in the IANA Registry of
   Coded Character Sets [IANA-CHAR] (see also [RFC2978]) and the
   '(preferred MIME name)' should be used as the charset tag in this
   attribute.

For consistency with IPP/1.1 [RFC2911], charset tags in this
   attribute should be lowercase normalized.

4.12.  printer-charset-supported

( 1.3.18.0.2.4.1131
   NAME 'printer-charset-supported'
   DESC 'Set of charsets supported for the attribute values of syntax
         DirectoryString for this directory entry.'
   EQUALITY caseIgnoreMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{63}
   )

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RFC 3712            LDAP Schema for Printer Services       February 2004

For example:

'utf-8' (ISO 10646/Unicode in UTF-8 transform [RFC2279])
       'iso-8859-1' (Latin1)

For consistency 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 'Natural language(s) supported for this directory entry.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{63}
   )

Values of language tags should conform to "Tags for the
   Identification of Languages" [RFC3066].  For example:

'en-us' (English as spoken in the US)
       'fr-fr' (French as spoken in France)

For consistency 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 'The possible source document formats which may be interpreted
         and printed by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{127}
   )

Values of document formats should be MIME media types defined in the
   IANA Registry of MIME Media Types [IANA-MIME] (see also [RFC2048]).

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RFC 3712            LDAP Schema for Printer Services       February 2004

4.15.  printer-color-supported

( 1.3.18.0.2.4.1129
   NAME 'printer-color-supported'
   DESC 'Indicates whether 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
   )

4.16.  printer-compression-supported

( 1.3.18.0.2.4.1128
   NAME 'printer-compression-supported'
   DESC 'Compression algorithms supported by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{255}
   )

Values defined in IPP/1.1 [RFC2911] 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 which may 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 which may 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 'The possible finishing operations supported by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{255}
   )

Values defined in IPP/1.1 [RFC2911] 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'.

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 'The possible numbers of print-stream pages to impose upon a
         single side of an instance of a selected medium.'
   EQUALITY integerMatch
   ORDERING integerOrderingMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.27
   )

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Values defined in IPP/1.1 [RFC2911] include: '1', '2', and '4'.

Note:  Implementations may support other values.

4.21.  printer-sides-supported

( 1.3.18.0.2.4.1123
   NAME 'printer-sides-supported'
   DESC 'The number 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{127}
   )

Values defined in IPP/1.1 [RFC2911] include:  '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 'The standard names/types/sizes (and optional color suffixes) of
         the media supported by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{255}
   )

Values are defined in IPP/1.1 [RFC2911] or any IANA registered
   extensions.  For example:

'iso-a4'
       'envelope'
       'na-letter-white'

4.23.  printer-media-local-supported

( 1.3.18.0.2.4.1117
   NAME 'printer-media-local-supported'
   DESC 'Site-specific names of media supported by this printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{255}
   )

Values should be in the natural language specified by printer-
   natural-language-configured.

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RFC 3712            LDAP Schema for Printer Services       February 2004

For example:

'purchasing-form' (site-specific name)

as opposed to 'na-letter' (standard keyword from IPP/1.1 [RFC2911])
   in the printer-media-supported attribute.

4.24.  printer-resolution-supported

( 1.3.18.0.2.4.1121
   NAME 'printer-resolution-supported'
   DESC 'List of resolutions supported for printing documents by this
         printer.'
   EQUALITY caseIgnoreMatch
   SUBSTR caseIgnoreSubstringsMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{255}
   )

Each resolution value should be a string containing 3 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 should be delimited by '>'.  For example:

'300> 300> dpi>'
       '600> 600> dpi>'

Note:  This attribute is based on 'printer-resolution-supported'
   defined in IPP/1.1 [RFC2911] (which has a binary complex encoding)
   derived from 'prtMarkerAddressabilityFeedDir',
   'prtMarkerAddressabilityXFeedDir', and 'prtMarkerAddressabilityUnit'
   defined in the Printer MIB [RFC1759] (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
   [SLP-PRT].  Whitespace is permitted after (but not before) the
   delimiter '>'.  Note that this delimiter differs from printer-xri-
   supported.

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4.25.  printer-print-quality-supported

( 1.3.18.0.2.4.1120
   NAME 'printer-print-quality-supported'
   DESC '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{127}
   )

Values defined in IPP/1.1 [RFC2911] include:

'unknown'
       'draft'
       'normal'
       'high'

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 may 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
   )

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RFC 3712            LDAP Schema for Printer Services       February 2004

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 [SLP-
   PRT].

4.28.  printer-job-k-octets-supported

( 1.3.18.0.2.4.1111
   NAME 'printer-job-k-octets-supported'
   DESC 'The maximum size in kilobytes (1,024 octets actually) incoming
         print job that this printer will accept.'
   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 [SLP-
   PRT].

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{127}
   SINGLE-VALUE
   )

The value of this attribute should include information that would
   enable other humans to reach the operator, such as a telephone
   number.

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RFC 3712            LDAP Schema for Printer Services       February 2004

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{127}
   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.

4.31.  printer-delivery-orientation-supported

( 1.3.18.0.2.4.1114
   NAME 'printer-delivery-orientation-supported'
   DESC 'The possible delivery orientations of pages as they are printed
         and ejected from this printer.'
   EQUALITY caseIgnoreMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{127}
   )

Values defined include:

'unknown'
       'face-up'
       'face-down'

Note:  The syntax and values for this attribute are aligned with the
   equivalent attribute in the 'service:printer:' v2.0 template [SLP-
   PRT].

4.32.  printer-stacking-order-supported

( 1.3.18.0.2.4.1115
   NAME 'printer-stacking-order-supported'
   DESC 'The possible stacking order of pages as they are printed and
         ejected from this printer.'
   EQUALITY caseIgnoreMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{127}
   )

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RFC 3712            LDAP Schema for Printer Services       February 2004

Values defined include:

'unknown'
       'first-to-last'
       'last-to-first'

Note:  The syntax and values for this attribute are aligned with the
   equivalent attribute in the 'service:printer:' v2.0 template [SLP-
   PRT].

4.33.  printer-output-features-supported

( 1.3.18.0.2.4.1116
   NAME 'printer-output-features-supported'
   DESC 'The possible output features supported by this printer.'
   EQUALITY caseIgnoreMatch
   SYNTAX  1.3.6.1.4.1.1466.115.121.1.15{127}
   )

Values defined include:

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

Note:  The syntax and values for this attribute are aligned with the
   equivalent attribute in the 'service:printer:' v2.0 template [SLP-
   PRT].

Note:  Implementations may support other values.

4.34.  printer-aliases

( 1.3.18.0.2.4.1108
   NAME 'printer-aliases'
   DESC 'List of 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{127}
   )

Fleming & McDonald           Informational                     [Page 25]

RFC 3712            LDAP Schema for Printer Services       February 2004

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 6 of [RFC2252], 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 [RFC2279])
   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 8 of [RFC2252] and/or Section 2 of
   [RFC3698], 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 does define the following Object Identifier
   Descriptors.  They have been registered by the IANA:

7.1.  Registration of Object Classes

Subject:  Request for LDAP Descriptor Registration

Descriptor (short name):  see table below

Object Identifier:  see table below

Person & email address to contact for further information:  see below

Usage:  object class

Fleming & McDonald           Informational                     [Page 26]

RFC 3712            LDAP Schema for Printer Services       February 2004

Specification:  RFC3712

Author/Change Controller:

Pat Fleming
       IBM
       Highway 52 N
       Rochester, MN 55901
       USA
       Phone: +1 507-253-7583
       EMail: flemingp@us.ibm.com

Comments:

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

7.2.  Registration of Attribute Types

Subject:  Request for LDAP 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:  RFC3712

Author/Change Controller:

Pat Fleming
       IBM
       Highway 52 N
       Rochester, MN 55901
       USA
       Phone: +1 507-253-7583
       EMail: flemingp@us.ibm.com

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RFC 3712            LDAP Schema for Printer Services       February 2004

Comments:

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
   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
   [RFC2279], as required by [RFC2252].

A language tag [RFC3066] for all of the text string attributes
   defined in this document is contained in the printer-natural-
   language-configured attribute.

Fleming & McDonald           Informational                     [Page 28]

RFC 3712            LDAP Schema for Printer Services       February 2004

Therefore, all object classes defined in this document conform to the
   "IETF Policy on Character Sets and Languages" [RFC2277].

9.  Security Considerations

See [RFC2829] for detailed guidance on authentication methods for
   LDAP.  See [RFC2830] for detailed guidance of using TLS/1.0 [RFC2246]
   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.

For additional security considerations of deploying printers in an
   IPP environment, see Section 8 of [RFC2911].

10.  References

10.1.  Normative References

[IANA-CHAR] IANA Registry of Character Sets
               http://www.iana.org/assignments/charset-reg/...

[IANA-MIME] IANA Registry of MIME Media Types
               http://www.iana.org/assignments/media-types/...

[LDAP-TS]   Hodges, J. and R. Morgan, "Lightweight Directory Access
               Protocol (v3): Technical Specification", RFC 3377,
               September 2002.

[RFC1274]   Barker, P. and S. Kille, "The COSINE and Internet X.500
               Schema", RFC 1274, November 1991.

[RFC1759]   Smith, R., Wright, F., Hastings, T., Zilles, S. and J.
               Gyllenskog, "Printer MIB", RFC 1759, March 1995.

[RFC2119]   Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

[RFC2252]   Wahl, M., Coulbeck, T., Howes, T. and S. Kille,
               "Lightweight Directory Access Protocol (v3): Attribute
               Syntax Definitions", RFC 2252, December 1997.

Fleming & McDonald           Informational                     [Page 29]

RFC 3712            LDAP Schema for Printer Services       February 2004

[RFC2396]   Berners-Lee. T., Fielding, R. and L. Masinter, "URI
               Generic Syntax", RFC 2396, August 1998.

[RFC2829]   Wahl, M., Alvestrand, H., Hodges, J. and R. Morgan,
               "Authentication Methods for LDAP", RFC 2829, May 2000.

[RFC2830]   Hodges, J., Morgan, R. and M. Wahl, "Lightweight
               Directory Access Protocol (v3): Extension for Transport
               Layer Security", RFC 2830, May 2000.

[RFC2911]   Hastings, T., Ed.., Herrito, R., deBry, R., Isaacson, S.
               and P. Powell, "Internet Printing Protocol/1.1: Model and
               Semantics", RFC 2911, September 2000.

[RFC2926]   Kempf, J., Moats, R. and P. St. Pierre, "Conversion of
               LDAP Schemas to and from SLP Templates", RFC 2926,
               September 2000.

[RFC3066]   Alvestrand, H., "Tags for the Identification of
               Languages", BCP 47, RFC 3066, January 2001.

[RFC3698]   Zeilenga, K., Ed., "Lightweight Directory Access Protocol
               (LDAP): Additional Matching Rules", RFC 3698, February
               2004.

10.2.  Informative References

[IANA-SLPT] IANA Registry of SLP Templates
               http://www.iana.org/assignments/svrloc-templates/...

[RFC1179]   McLaughlin, L., "Line Printer Daemon Protocol", RFC 1179,
               August 1990.

[RFC1951]   Deutsch, P., "DEFLATE Compressed Data Format
               Specification Version 1.3", RFC 1951, May 1996.

[RFC1952]   Deutsch, P., "GZIP File Format Specification Version
               4.3", RFC 1952, May 1996.

[RFC1977]   Schryver, V., "PPP BSD Compression Protocol", RFC 1977,
               August 1996.

[RFC2048]   Freed, N., Klensin, J. and J. Postel, "Multipurpose
               Internet Mail Extensions (MIME) Part Four: Registration
               Procedures", BCP 13, RFC 2048, November 1996.

Fleming & McDonald           Informational                     [Page 30]

RFC 3712            LDAP Schema for Printer Services       February 2004

[RFC2079]   Smith, M., "Definition of an X.500 Attribute Type and an
               Object Class to Hold Uniform Resource Identifiers
               (URIs)", RFC 2079, January 1997.

[RFC2246]   Dierks, T. and C. Allen, "TLS Protocol Version 1.0", RFC
               2246, January 1999.

[RFC2277]   Alvestrand, H., "IETF Policy on Character Sets and
               Languages", RFC 2277, January 1998.

[RFC2279]   Yergeau, F., "UTF-8, a Transformation Format of ISO
               10646", RFC 2279, January 1998.

[RFC2608]   Guttman, E., Perkins, C., Veizades, J. and M. Day,
               "Service Location Protocol v2", RFC 2608, June 1999.

[RFC2609]   Guttman, E., Perkins, C. and J. Kempf, "Service Templates
               and Service: Schemes", RFC 2609, June 1999.

[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, June 1999.

[RFC2717]   Petke, R. and I. King, "Registration Procedures for URL
               Scheme Names", RFC 2717, November 1999.

[RFC2718]   Masinter, L., Alvestrand, H., Zigmond, D. and R. Petke,
               "Guidelines for new URL Schemes", BCP 19, RFC 2718,
               November 1999.

[RFC2978]   Freed, N. and J.Postel, "IANA Charset Registration
               Procedures", RFC2978, October 2000.

[SLP-PRT]   St. Pierre, Isaacson, McDonald.  Definition of the
               Printer Abstract Service Type v2.0, <durable URL below>,
               May 2000. Reviewed and approved by IETF SLP Designated
               Expert, according to Section 5 'IANA Considerations' in
               [RFC2609].

Archived in the IANA Registry of SLP Templates [IANA-
               SLPT] at: http://www.iana.org/assignments/svrloc-
               templates/printer.2.0.en

[W3C-IRI]   Duerst, Suignard, "Internationalized Resource Identifiers
               (IRI), Work in Progress.

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RFC 3712            LDAP Schema for Printer Services       February 2004

11.  Acknowledgments

The editors wish to acknowledge the very significant contributions of
   Ken Jones (Bytemobile) and Harry Lewis (IBM) during the development
   of this document.

Thanks to Patrik Faltstrom (Cisco), Ryan Moats (Lemur Networks),
   Robert Moore (IBM), Lee Rafalow (IBM), Kimberly Reger (IBM), Kurt
   Zeilenga (OpenLDAP), and the members of the IETF IPP Working Group,
   for review comments and help in preparing this document.

12.  Authors' Addresses

Please send comments to the authors at the addresses listed below.

Pat Fleming
   IBM
   Highway 52 N
   Rochester, MN 55901
   USA

Phone: +1 507-253-7583
   EMail: flemingp@us.ibm.com

Ira McDonald
   High North Inc
   221 Ridge Ave
   Grand Marais, MI 49839
   USA

Phone: +1 906-494-2434
   Email: imcdonald@sharplabs.com

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RFC 3712            LDAP Schema for Printer Services       February 2004

13.  Full Copyright Statement

Copyright (C) The Internet Society (2004).  This document is subject
   to the rights, licenses and restrictions contained in BCP 78 and
   except as set forth therein, the authors retain all their rights.

This document and the information contained herein are provided on an
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Acknowledgement

Funding for the RFC Editor function is currently provided by the
   Internet Society.

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