Internet DRAFT - draft-dally-ldapbis-rfc2256

draft-dally-ldapbis-rfc2256



INTERNET-DRAFT                                                  K. Dally
Intended Category:  Standard Track                       The MITRE Corp.
Expires 7 May 2001                                      16 November 2000
Obsoletes:  2256


    A Summary of the X.500(3rd edition) User Schema for use with LDAPv3
                  draft-dally-ldapbis-rfc2256-00.txt 

   [Editor's note:  This Internet-Draft (I-D) contains changes to the 
   text of RFC 2256, in order to bring it up to date.  This action is 
   part of the maintenance activity that is needed in order to progress 
   LDAPv3 to Draft Standard.  The changes are:

      * Revision of the Status of this Memo.

      * Dependencies on RFC 1274 have been eliminated.

      * The references to X.500(96) have been expressed in terms of the 
        "edition", rather than the standard date.  Note that the version
        of X.500 which is the basis for this document, is the third 
        edition, which was finalized in 1996, but approved in 1997.

      * The "teletexTerminalNumber" attribute and syntax are marked 
        as obsolete.

      * Removed "The syntax definitions are based on the ISODE "QUIPU" 
        implementation of X.500." from section 6.

      * Added text to 6.1, the octetString syntax, in accordance 
        with X.520.

      * Some of the attribute types MUST be recognized by servers.  
        Also, several attributes are obsolete.  Therefore, the various 
        kinds of attribute types have been placed in separate sections:

           - necessary for the directory to operate (section 3.1) 

           - for holding user information (section 3.2) 

           - obsolete (section 3.3).  

      * Since "top" may be implicitly specified and  "alias" is not 
        abstract, the last sentence in the description of the 
        "objectClass" attribute type, section 3.1.1, has been deleted.
        The clause that preceded the deleted sentence has been 
        removed, also.

      * Add a description to the definition of the "telephoneNumber" 
        attribute type, section 3.2.17.

      * Add text to mark the "teletexTerminalIdentifier" attribute type 
        as obsolete.




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      * Add a security consideration requiring strong authentication in 
        order to modify directory entries.

   One task that has not been completed is augmentation of the 
   descriptions of some attribute types.

End of Editor's note]


Status of this Memo

   This document is an Internet-Draft and is in full conformance with 
   all provisions of Section 10 of RFC2026.

   This document is intended to be, after appropriate review and
   revision, submitted to the RFC Editor as a Standard Track document.
   Distribution of this memo is unlimited.  Technical discussion of 
   this document will take place on the IETF LDAP Revision (Proposed) 
   Working Group (LDAPbis) mailing list <ietf-ldapbis@openldap.org>.  
   Please send editorial comments directly to the author 
   <kdally@mitre.org>.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.  Internet-Drafts are draft documents valid for a
   maximum of six months and may be updated, replaced, or obsoleted by
   other documents at any time.  It is inappropriate to use 
   Internet-Drafts as reference material or to cite them other than as
   "work in progress."

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

   Copyright 2000, The Internet Society.  All Rights Reserved.

   Please see the Copyright section near the end of this document for
   more information.


Abstract

   This document provides an overview of the attribute types and object
   classes defined by the ISO/IEC JTC1 and ITU-T committees in the 
   IS0/IEC 9594 and  X.500 documents, in particular those intended for 
   use by directory clients.  This is the most widely used schema for 
   LDAP/X.500 directories, and many other schema definitions for white 
   pages objects use it as a basis.  This document does not cover 
   attributes used for the administration of X.500 directory servers, 
   nor does it include attributes defined by other ISO/ITU-T documents.


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   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [6].


Table of Contents

   <tbs>


1. General Issues

   This document references syntaxes given in section 4 of this document
   and section 6 of [1].  Matching rules are listed in section 6 of this
   document and section 8 of [1].

   The attribute type and object class definitions are written using the
   BNF form of AttributeTypeDescription and ObjectClassDescription given
   in [1].  Lines have been folded for readability.


2. Source

   The schema definitions in this document are based on those found in
   X.500 [2],[3],[4],[5], specifically:

        Sections                Source
        ============            ============
        3.1  - 3.2              X.501 [2]
        3.3  - 3.36             X.520 [4]
        3.37 - 3.41             X.509 [3]
        3.42 - 3.52             X.520 [4]
        3.53 - 3.54             X.509 [3]
        3.55                    X.520 [4]
        4.1 - 4.6               X.520 [4]
        4.7                     X.509 [4]
        5.1  - 5.2              X.501 [2]
        5.3  - 5.18             X.521 [5]
        5.19 - 5.21             X.509 [3]
        5.22                    X.521 [5]
        6.1                     X.520 [4]

   Three new attributes:  supportedAlgorithms, deltaRevocationList and
   dmdName, and the objectClass dmd, which were not specified in X.500 
   edition 2 (1993), are defined in the X.500 edition 3 (1997)[2, 3, 4] 
   documents.


3. Attribute Types

   Three kinds of attribute types are contained in this section:  ones 
   that are necessary for the directory to operate, others for  holding 


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   user information, and obsolete attribute types.

3.1  "MUST" Attribute Types

   An LDAP server implementation MUST recognize the attribute types
   described in this section.

3.1.1  objectClass

   The values of the objectClass attribute describe the kind of object
   which an entry represents.  The objectClass attribute is present in
   every entry.  

    ( 2.5.4.0 NAME 'objectClass' EQUALITY objectIdentifierMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.38 )

3.2  "SHOULD" Attribute Types

   An LDAP server implementation SHOULD recognize the attribute types
   described in this section.

3.2.1  aliasedObjectName

   The aliasedObjectName attribute is used by the directory service if
   the entry containing this attribute is an alias.

    ( 2.5.4.1 NAME 'aliasedObjectName' EQUALITY distinguishedNameMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 SINGLE-VALUE )

3.2.2  cn

   This is the X.500 commonName attribute, which contains a name of an
   object.  If the object corresponds to a person, it is typically the
   person's full name.

    ( 2.5.4.3 NAME 'cn' SUP name )

3.2.3  sn

   This is the X.500 surname attribute, which contains the family name
   of a person.

    ( 2.5.4.4 NAME 'sn' SUP name )

3.2.4  serialNumber

   This attribute contains the serial number of a device.

    ( 2.5.4.5 NAME 'serialNumber' EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.44{64} )



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3.2.5  c

   This is the X.500 countryName attribute, which contains a two-letter 
   ISO 3166 country code.

    ( 2.5.4.6 NAME 'c' SUP name SINGLE-VALUE )

3.2.5  l

   This is the X.500 localityName attribute, which contains the name of 
   a locality, such as a city, county or other geographic region.

    ( 2.5.4.7 NAME 'l' SUP name )

3.2.6  st

   This is the X.500 stateOrProvinceName attribute, which contains the 
   full name of a state or province.

    ( 2.5.4.8 NAME 'st' SUP name )

3.2.7  street

   This is the X.500 streetAddress attribute, which contains the 
   physical address of the object to which the entry corresponds, such 
   as an address for package delivery.

    ( 2.5.4.9 NAME 'street' EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{128} )

3.2.8  o

   This is the X.500 organizationName attribute, which contains the 
   name of an organization.

    ( 2.5.4.10 NAME 'o' SUP name )

3.2.9  ou

   This is the X.500 organizationalUnitName attribute, which contains 
   the name of an organizational unit.

    ( 2.5.4.11 NAME 'ou' SUP name )

3.2.10 title

   This attribute contains the title, such as "Vice President", of a
   person in their organizational context.  The "personalTitle"
   attribute would be used for a person's title independent of their job
   function.



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    ( 2.5.4.12 NAME 'title' SUP name )

3.2.11 description

   This attribute contains a human-readable description of the object.

    ( 2.5.4.13 NAME 'description' EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{1024} )

3.2.12 businessCategory

   This attribute describes the kind of business performed by an
   organization.

   ( 2.5.4.15 NAME 'businessCategory' EQUALITY caseIgnoreMatch
     SUBSTR caseIgnoreSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{128} )

3.2.13 postalAddress

   ( 2.5.4.16 NAME 'postalAddress' EQUALITY caseIgnoreListMatch
     SUBSTR caseIgnoreListSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.41 )

3.2.14 postalCode

   ( 2.5.4.17 NAME 'postalCode' EQUALITY caseIgnoreMatch
     SUBSTR caseIgnoreSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{40} )

3.2.15 postOfficeBox

   ( 2.5.4.18 NAME 'postOfficeBox' EQUALITY caseIgnoreMatch
     SUBSTR caseIgnoreSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{40} )

3.2.16 physicalDeliveryOfficeName

   ( 2.5.4.19 NAME 'physicalDeliveryOfficeName' EQUALITY caseIgnoreMatch
     SUBSTR caseIgnoreSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{128} )

3.2.17 telephoneNumber

   A value of this attribute is a telephone number complying with CCITT 
   Rec. E.123.

   ( 2.5.4.20 NAME 'telephoneNumber' EQUALITY telephoneNumberMatch
     SUBSTR telephoneNumberSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.50{32} )



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3.2.18 telexNumber

   ( 2.5.4.21 NAME 'telexNumber'
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.52 )

3.2.19 facsimileTelephoneNumber

   ( 2.5.4.23 NAME 'facsimileTelephoneNumber'
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.22 )

3.2.20 x121Address

   ( 2.5.4.24 NAME 'x121Address' EQUALITY numericStringMatch
     SUBSTR numericStringSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.36{15} )

3.2.21 internationalISDNNumber

   ( 2.5.4.25 NAME 'internationalISDNNumber' EQUALITY numericStringMatch
     SUBSTR numericStringSubstringsMatch
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.36{16} )

3.2.22 registeredAddress

   This attribute holds a postal address suitable for reception of
   telegrams or expedited documents, where it is necessary to have the
   recipient accept delivery.

    ( 2.5.4.26 NAME 'registeredAddress' SUP postalAddress
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.41 )

3.2.23 destinationIndicator

   This attribute is used for the telegram service.

    ( 2.5.4.27 NAME 'destinationIndicator' EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.44{128} )

3.2.24 preferredDeliveryMethod

    ( 2.5.4.28 NAME 'preferredDeliveryMethod'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.14
      SINGLE-VALUE )

3.2.25 presentationAddress

   This attribute contains an OSI presentation address.






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    ( 2.5.4.29 NAME 'presentationAddress'
      EQUALITY presentationAddressMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.43
      SINGLE-VALUE )

3.2.26 supportedApplicationContext

   This attribute contains the identifiers of OSI application contexts.

    ( 2.5.4.30 NAME 'supportedApplicationContext'
      EQUALITY objectIdentifierMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.38 )

3.2.27 member

    ( 2.5.4.31 NAME 'member' SUP distinguishedName )

3.2.28 owner

    ( 2.5.4.32 NAME 'owner' SUP distinguishedName )

3.2.29 roleOccupant

    ( 2.5.4.33 NAME 'roleOccupant' SUP distinguishedName )

3.2.30 seeAlso

    ( 2.5.4.34 NAME 'seeAlso' SUP distinguishedName )

3.2.31 userPassword

    ( 2.5.4.35 NAME 'userPassword' EQUALITY octetStringMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.40{128} )

   Passwords are stored using an Octet String syntax and are not
   encrypted.  Transfer of cleartext passwords are strongly discouraged
   where the underlying transport service cannot guarantee
   confidentiality and may result in disclosure of the password to
   unauthorized parties.

3.2.32 userCertificate

   This attribute is to be stored and requested in the binary form, as
   'userCertificate;binary'.

    ( 2.5.4.36 NAME 'userCertificate'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.8 )

3.2.33 cACertificate

   This attribute is to be stored and requested in the binary form, as
   'cACertificate;binary'.


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    ( 2.5.4.37 NAME 'cACertificate'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.8 )

3.2.34 authorityRevocationList

   This attribute is to be stored and requested in the binary form, as
   'authorityRevocationList;binary'.

    ( 2.5.4.38 NAME 'authorityRevocationList'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.9 )

3.2.35 certificateRevocationList

   This attribute is to be stored and requested in the binary form, as
   'certificateRevocationList;binary'.

    ( 2.5.4.39 NAME 'certificateRevocationList'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.9 )

3.2.36 crossCertificatePair

   This attribute is to be stored and requested in the binary form, as
   'crossCertificatePair;binary'.

    ( 2.5.4.40 NAME 'crossCertificatePair'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.10 )

3.2.37 name

   The name attribute type is the attribute supertype from which string
   attribute types typically used for naming may be formed.  It is
   unlikely that values of this type itself will occur in an entry. LDAP
   server implementations which do not support attribute subtyping need
   not recognize this attribute in requests.   Client implementations
   MUST NOT assume that LDAP servers are capable of performing attribute
   subtyping.

    ( 2.5.4.41 NAME 'name' EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{32768} )

3.2.38 givenName

   The givenName attribute is used to hold the part of a person's name
   which is not their surname nor middle name.

    ( 2.5.4.42 NAME 'givenName' SUP name )

3.2.39 initials

   The initials attribute contains the initials of some or all of an
   individuals names, but not the surname(s).


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    ( 2.5.4.43 NAME 'initials' SUP name )

3.2.40 generationQualifier

   The generationQualifier attribute contains the part of the name which
   typically is the suffix, as in "IIIrd".

    ( 2.5.4.44 NAME 'generationQualifier' SUP name )

3.2.41 x500UniqueIdentifier

   The x500UniqueIdentifier attribute is used to distinguish between
   objects when a distinguished name has been reused.  This is a
   different attribute type from both the "uid" and "uniqueIdentifier"
   types.

    ( 2.5.4.45 NAME 'x500UniqueIdentifier' EQUALITY bitStringMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.6 )

3.2.42 dnQualifier

   The dnQualifier attribute type specifies disambiguating information
   to add to the relative distinguished name of an entry.  It is
   intended for use when merging data from multiple sources in order to
   prevent conflicts between entries which would otherwise have the same
   name. It is recommended that the value of the dnQualifier attribute
   be the same for all entries from a particular source.

    ( 2.5.4.46 NAME 'dnQualifier' EQUALITY caseIgnoreMatch
      ORDERING caseIgnoreOrderingMatch SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.44 )

3.2.43 enhancedSearchGuide

   This attribute is for use by X.500 clients in constructing search
   filters.

    ( 2.5.4.47 NAME 'enhancedSearchGuide'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.21 )

3.2.44 protocolInformation

   This attribute is used in conjunction with the presentationAddress
   attribute, to provide additional information to the OSI network
   service.

    ( 2.5.4.48 NAME 'protocolInformation'
      EQUALITY protocolInformationMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.42 )





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3.2.45 distinguishedName

   This attribute type is not used as the name of the object itself, but
   it is instead a base type from which attributes with DN syntax
   inherit.

   It is unlikely that values of this type itself will occur in an
   entry.  LDAP server implementations which do not support attribute
   subtyping need not recognize this attribute in requests.   Client
   implementations MUST NOT assume that LDAP servers are capable of
   performing attribute subtyping.

    ( 2.5.4.49 NAME 'distinguishedName' EQUALITY distinguishedNameMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 )

3.2.46 uniqueMember

    ( 2.5.4.50 NAME 'uniqueMember' EQUALITY uniqueMemberMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.34 )

3.2.47 houseIdentifier

   This attribute is used to identify a building within a location.

    ( 2.5.4.51 NAME 'houseIdentifier' EQUALITY caseIgnoreMatch
      SUBSTR caseIgnoreSubstringsMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{32768} )

3.2.48 supportedAlgorithms

   This attribute is to be stored and requested in the binary form, as
   'supportedAlgorithms;binary'.

    ( 2.5.4.52 NAME 'supportedAlgorithms'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.49 )

3.2.49 deltaRevocationList

   This attribute is to be stored and requested in the binary form, as
   'deltaRevocationList;binary'.

    ( 2.5.4.53 NAME 'deltaRevocationList'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.9 )

3.2.50 dmdName

   The value of this attribute specifies a directory management domain
   (DMD), the administrative authority which operates the directory
   server.

    ( 2.5.4.54 NAME 'dmdName' SUP name )



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3.3  Obsolete Attribute Types

   The use of the attribute types in this section is greatly discouraged.

3.3.1  knowledgeInformation

   This attribute is obsolete.

    ( 2.5.4.2 NAME 'knowledgeInformation' EQUALITY caseIgnoreMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{32768} )

3.3.2  searchGuide

   This attribute is for use by clients in constructing search filters.
   It is obsoleted by enhancedSearchGuide, described above in 3.2.43.

    ( 2.5.4.14 NAME 'searchGuide'
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.25 )

3.3.3  teletexTerminalIdentifier

   The withdrawal of Rec. F.200 has made this attribute obsolete.

   ( 2.5.4.22 NAME 'teletexTerminalIdentifier'
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.51 )


4.  Syntaxes

   Servers SHOULD recognize the syntaxes defined in this section.  Each
   syntax begins with a sample value of the ldapSyntaxes attribute which
   defines the OBJECT IDENTIFIER of the syntax.  The descriptions of
   syntax names are not carried in protocol, and are not guaranteed to
   be unique.

4.1  Delivery Method

   ( 1.3.6.1.4.1.1466.115.121.1.14 DESC 'Delivery Method' )

   Values in this syntax are encoded according to the following BNF:

      delivery-value = pdm / ( pdm whsp "$" whsp delivery-value )

      pdm = "any" / "mhs" / "physical" / "telex" / "teletex" /
                "g3fax" / "g4fax" / "ia5" / "videotex" / "telephone"

   Example:

      telephone





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4.2  Enhanced Guide

   ( 1.3.6.1.4.1.1466.115.121.1.21 DESC 'Enhanced Guide' )

   Values in this syntax are encoded according to the following BNF:

      EnhancedGuide = woid whsp "#" whsp criteria whsp "#" whsp subset

      subset = "baseobject" / "oneLevel" / "wholeSubtree"


   The criteria production is defined in the Guide syntax below.  This
   syntax has been added subsequent to RFC 1778.

   Example:

      person#(sn)#oneLevel

4.3  Guide

   ( 1.3.6.1.4.1.1466.115.121.1.25 DESC 'Guide' )

   Values in this syntax are encoded according to the following BNF:

      guide-value = [ object-class "#" ] criteria

      object-class = woid

      criteria = criteria-item / criteria-set / ( "!" criteria )

      criteria-set = ( [ "(" ] criteria "&" criteria-set [ ")" ] ) /
                     ( [ "(" ] criteria "|" criteria-set [ ")" ] )

      criteria-item = [ "(" ] attributetype "$" match-type [ ")" ]

      match-type = "EQ" / "SUBSTR" / "GE" / "LE" / "APPROX"

   This syntax should not be used for defining new attributes.

4.4  Octet String

   ( 1.3.6.1.4.1.1466.115.121.1.40 DESC 'Octet String' )

   Values in this syntax are encoded as octet strings.


   Example:

      secret





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4.5  Teletex Terminal Identifier

   ( 1.3.6.1.4.1.1466.115.121.1.51 DESC 'Teletex Terminal Identifier' )

   Values in this syntax are encoded according to the following BNF:

      teletex-id = ttx-term  0*("$" ttx-param)

      ttx-term   = printablestring

      ttx-param  = ttx-key ":" ttx-value

      ttx-key    = "graphic" / "control" / "misc" / "page" / "private"

      ttx-value  = octetstring

   In the above, the first printablestring is the encoding of the first
   portion of the teletex terminal identifier to be encoded, and the
   subsequent 0 or more octetstrings are subsequent portions of the
   teletex terminal identifier.

4.6  Telex Number

   ( 1.3.6.1.4.1.1466.115.121.1.52 DESC 'Telex Number' )

   Values in this syntax are encoded according to the following BNF:

      telex-number  = actual-number "$" country "$" answerback

      actual-number = printablestring

      country       = printablestring

      answerback    = printablestring

   In the above, actual-number is the syntactic representation of the
   number portion of the TELEX number being encoded, country is the
   TELEX country code, and answerback is the answerback code of a TELEX
   terminal.

4.7  Supported Algorithm

   ( 1.3.6.1.4.1.1466.115.121.1.49 DESC 'Supported Algorithm' )

   No printable representation of values of the supportedAlgorithms
   attribute is defined in this document.  Clients which wish to store
   and retrieve this attribute MUST use "supportedAlgorithms;binary", in
   which the value is transferred as a binary encoding.






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5.  Object Classes

   LDAP servers MUST recognize the object classes "top" and "subschema" 
   (defined in section 7.2 in [1]).  LDAP servers SHOULD recognize all the other 
   object classes listed here as values of the objectClass attribute.

5.1  top

   ( 2.5.6.0 NAME 'top' ABSTRACT MUST objectClass )

5.2  alias

   ( 2.5.6.1 NAME 'alias' SUP top STRUCTURAL MUST aliasedObjectName )

5.3  country

   ( 2.5.6.2 NAME 'country' SUP top STRUCTURAL MUST c
     MAY ( searchGuide $ description ) )

5.4  locality

   ( 2.5.6.3 NAME 'locality' SUP top STRUCTURAL
     MAY ( street $ seeAlso $ searchGuide $ st $ l $ description ) )

5.5  organization

   ( 2.5.6.4 NAME 'organization' SUP top STRUCTURAL MUST o
     MAY ( userPassword $ searchGuide $ seeAlso $ businessCategory $
     x121Address $ registeredAddress $ destinationIndicator $
     preferredDeliveryMethod $ telexNumber $ teletexTerminalIdentifier $
     telephoneNumber $ internationaliSDNNumber $
     facsimileTelephoneNumber $
     street $ postOfficeBox $ postalCode $ postalAddress $
     physicalDeliveryOfficeName $ st $ l $ description ) )

5.6  organizationalUnit

   ( 2.5.6.5 NAME 'organizationalUnit' SUP top STRUCTURAL MUST ou
     MAY ( userPassword $ searchGuide $ seeAlso $ businessCategory $
     x121Address $ registeredAddress $ destinationIndicator $
     preferredDeliveryMethod $ telexNumber $ teletexTerminalIdentifier $
     telephoneNumber $ internationaliSDNNumber $
     facsimileTelephoneNumber $
     street $ postOfficeBox $ postalCode $ postalAddress $
     physicalDeliveryOfficeName $ st $ l $ description ) )

5.7  person

   ( 2.5.6.6 NAME 'person' SUP top STRUCTURAL MUST ( sn $ cn )
     MAY ( userPassword $ telephoneNumber $ seeAlso $ description ) )



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5.8  organizationalPerson

   ( 2.5.6.7 NAME 'organizationalPerson' SUP person STRUCTURAL
     MAY ( title $ x121Address $ registeredAddress $
     destinationIndicator $
     preferredDeliveryMethod $ telexNumber $ teletexTerminalIdentifier $
     telephoneNumber $ internationaliSDNNumber $
     facsimileTelephoneNumber $
     street $ postOfficeBox $ postalCode $ postalAddress $
     physicalDeliveryOfficeName $ ou $ st $ l ) )

5.9  organizationalRole

   ( 2.5.6.8 NAME 'organizationalRole' SUP top STRUCTURAL MUST cn
     MAY ( x121Address $ registeredAddress $ destinationIndicator $
     preferredDeliveryMethod $ telexNumber $ teletexTerminalIdentifier $
     telephoneNumber $ internationaliSDNNumber $
     facsimileTelephoneNumber $
     seeAlso $ roleOccupant $ preferredDeliveryMethod $ street $
     postOfficeBox $ postalCode $ postalAddress $
     physicalDeliveryOfficeName $ ou $ st $ l $ description ) )

5.10 groupOfNames

   ( 2.5.6.9 NAME 'groupOfNames' SUP top STRUCTURAL MUST ( member $ cn )
     MAY ( businessCategory $ seeAlso $ owner $ ou $ o $ description ) )

5.11 residentialPerson

   ( 2.5.6.10 NAME 'residentialPerson' SUP person STRUCTURAL MUST l
     MAY ( businessCategory $ x121Address $ registeredAddress $
     destinationIndicator $ preferredDeliveryMethod $ telexNumber $
     teletexTerminalIdentifier $ telephoneNumber $
     internationaliSDNNumber $
     facsimileTelephoneNumber $ preferredDeliveryMethod $ street $
     postOfficeBox $ postalCode $ postalAddress $
     physicalDeliveryOfficeName $ st $ l ) )

5.12 applicationProcess

   ( 2.5.6.11 NAME 'applicationProcess' SUP top STRUCTURAL MUST cn
     MAY ( seeAlso $ ou $ l $ description ) )

5.13 applicationEntity

   ( 2.5.6.12 NAME 'applicationEntity' SUP top STRUCTURAL
     MUST ( presentationAddress $ cn )
     MAY ( supportedApplicationContext $ seeAlso $ ou $ o $ l $
     description ) )





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5.14 dSA

   ( 2.5.6.13 NAME 'dSA' SUP applicationEntity STRUCTURAL
     MAY knowledgeInformation )

5.15 device

   ( 2.5.6.14 NAME 'device' SUP top STRUCTURAL MUST cn
     MAY ( serialNumber $ seeAlso $ owner $ ou $ o $ l $ description ) )

5.16 strongAuthenticationUser

   ( 2.5.6.15 NAME 'strongAuthenticationUser' SUP top AUXILIARY
     MUST userCertificate )

5.17 certificationAuthority

   ( 2.5.6.16 NAME 'certificationAuthority' SUP top AUXILIARY
     MUST ( authorityRevocationList $ certificateRevocationList $
     cACertificate ) MAY crossCertificatePair )

5.18 groupOfUniqueNames

   ( 2.5.6.17 NAME 'groupOfUniqueNames' SUP top STRUCTURAL
     MUST ( uniqueMember $ cn )
     MAY ( businessCategory $ seeAlso $ owner $ ou $ o $ description ) )

5.19 userSecurityInformation

   ( 2.5.6.18 NAME 'userSecurityInformation' SUP top AUXILIARY
     MAY ( supportedAlgorithms ) )

5.20 certificationAuthority-V2

   ( 2.5.6.16.2 NAME 'certificationAuthority-V2' SUP
     certificationAuthority
     AUXILIARY MAY ( deltaRevocationList ) )

5.21 cRLDistributionPoint

   ( 2.5.6.19 NAME 'cRLDistributionPoint' SUP top STRUCTURAL
     MUST ( cn ) MAY ( certificateRevocationList $
     authorityRevocationList $
     deltaRevocationList ) )

5.22 dmd

   ( 2.5.6.20 NAME 'dmd' SUP top STRUCTURAL MUST ( dmdName )
     MAY ( userPassword $ searchGuide $ seeAlso $ businessCategory $
     x121Address $ registeredAddress $ destinationIndicator $
     preferredDeliveryMethod $ telexNumber $ teletexTerminalIdentifier $
     telephoneNumber $ internationaliSDNNumber $


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     facsimileTelephoneNumber $
     street $ postOfficeBox $ postalCode $ postalAddress $
     physicalDeliveryOfficeName $ st $ l $ description ) )


6.  Matching Rules

   Servers MAY implement additional matching rules.

6.1  octetStringMatch

   Servers which implement the extensibleMatch filter SHOULD allow the
   matching rule listed in this section to be used in the
   extensibleMatch.  In general these servers SHOULD allow matching
   rules to be used with all attribute types known to the server, when
   the assertion syntax of the matching rule is the same as the value
   syntax of the attribute.

   The Octet String Match rule compares for equality an asserted octet 
   string with an attribute value of type OCTET STRING.

   The strings match if they are the same length and corresponding 
   octets are identical.

   ( 2.5.13.17 NAME 'octetStringMatch'
    SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )


7.  Security Considerations

   Attributes of directory entries are used to provide descriptive
   information about the real-world objects they represent, which can be
   people, organizations or devices.  Most countries have privacy laws
   regarding the publication of information about people.

   Transfer of cleartext passwords is strongly discouraged where the
   underlying transport service cannot guarantee confidentiality and may
   result in disclosure of the password to unauthorized parties.

   It is required that strong authentication be performed in order to 
   modify directory entries using LDAP.

8.  Acknowledgements

   The definitions, on which this document is based, have been developed
   by committees for telecommunications and international standards.  
   No new attribute definitions have been added.  







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9.  Bibliography

   [1] replacement (draft-hinckley-ldapbis-rfc2252-nn) for Wahl, M., 
       Coulbeck, A., Howes, T., and S. Kille, "Lightweight X.500 
       Directory Access Protocol(v3):  Attribute Syntax Definitions", 
       RFC 2252, December 1997

   [2] The Directory:  Models, ITU-T Recommendation X.501, 1997

   [3] The Directory:  Authentication Framework, ITU-T Recommendation 
       X.509, 1997

   [4] The Directory: Selected Attribute Types, ITU-T Recommendation 
       X.520, 1997

   [5] The Directory: Selected Object Classes.  ITU-T Recommendation
       X.521, 1997

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


10. Author's Address

   Kathy Dally
   The MITRE Corp.
   1820 Dolley Madison Blvd., ms-W650
   McLean VA 22102
   USA
   
   Phone:  +1 703 883 6058
   Email:  kdally@mitre.org






















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