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732 lines
22 KiB
Plaintext
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Network Working Group S. Kille
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Request for Comments: 2294 Isode Ltd.
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Obsoletes: 1836 March 1998
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Category: Standards Track
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Representing the O/R Address hierarchy in the
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X.500 Directory Information Tree
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Status of this Memo
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This document specifies an Internet standards track protocol for the
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Internet community, and requests discussion and suggestions for
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improvements. Please refer to the current edition of the "Internet
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Official Protocol Standards" (STD 1) for the standardization state
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and status of this protocol. Distribution of this memo is unlimited.
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Copyright Notice
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Copyright (C) The Internet Society (1998). All Rights Reserved.
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Abstract
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This document defines a representation of the O/R Address hierarchy
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in the Directory Information Tree [6, 1]. This is useful for a range
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of purposes, including:
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o Support for MHS Routing [4].
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o Support for X.400/RFC 822 address mappings [2, 5].
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Please send comments to the author or to the discussion group <mhs-
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ds@mercury.udev.cdc.com>.
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Kille Standards Track [Page 1]
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RFC 2294 Directory Information Tree March 1998
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Object Class Mandatory
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------------ ---------
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mHSCountry M
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aDMD M
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pRMD O
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mHSX121 O
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mHSNumericUserIdentifier O
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mHSOrganization O
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mHSOrganizationalUnit O
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mHSPerson O
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mHSNamedObject O
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mHSTerminalID O
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mHSDomainDefinedAttribute O
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Table 1: Order of O/R Address Directory Components
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1 The O/R Address Hierarchy
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An O/R Address hierarchy is represented in the X.500 directory by
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associating directory name components with O/R Address components.
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An example of this is given in Figure 1. The object classes and
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attributes required to support this representation are defined in
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Figure 2. The schema, which defines the hierarchy in which these
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objects are represented in the directory information tree is
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specified in Table 1. A given object class defined in the table will
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always be higher in the DIT than an object class defined lower down
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the table. Valid combinations of O/R Address components are defined
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in X.400.
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Kille Standards Track [Page 2]
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RFC 2294 Directory Information Tree March 1998
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/\
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/ \
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C=GB / \ Numeric-C=234
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/ \
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/ \
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/ \
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+------------+<----------------+----+
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| Country | | |
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+------------+ +----+
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/\
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/ \
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/ \
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/ \
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ADMD=" " / \ ADMD=Gold 400
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+-------------+ +------------+
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| ADMD | | ADMD |
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+-------------+ +------------+
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\ \
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\ \
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\ PRMD=UK.AC \ PRMD=UK.AC
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\ \
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+----------+ +----+
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| PRMD |< -----------| |
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+----------+ +----+
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/
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/
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O=UCL
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/
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/
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+------------+
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| MHS-Org |
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+------------+
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\
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\ OU=CS
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\
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\
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+-----------+
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| MHS-OU |
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+-----------+
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Figure 1: Example O/R Address Tree
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Kille Standards Track [Page 3]
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RFC 2294 Directory Information Tree March 1998
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IMPORTS
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ub-domain-name-length, ub-organization-name-length,
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ub-organizational-unit-name-length, ub-common-name-length,
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ub-x121-address-length, ub-domain-defined-attribute-type-length,
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ub-domain-defined-attribute-value-length, ub-terminal-id-length,
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ub-numeric-user-id-length, ub-country-name-numeric-length,
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ub-surname-length, ub-given-name-length, ub-initials-length,
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ub-generation-qualifier-length
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FROM MTSUpperBounds {joint-iso-ccitt mhs-motis(6) mts(3) 10
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modules(0) upper-bounds(3) };
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mHSCountry OBJECT-CLASS ::= {
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SUBCLASS OF {country}
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MAY CONTAIN {mHSNumericCountryName}
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ID oc-mhs-country}
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mHSNumericCountryName ATTRIBUTE ::= {
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WITH SYNTAX NumericString (SIZE (1..ub-country-name-numeric-length))
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SINGLE VALUE 20
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ID at-mhs-numeric-country-name}
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aDMD OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {aDMDName}
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ID oc-admd}
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aDMDName ATTRIBUTE ::= {
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SUBTYPE OF name
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WITH SYNTAX DirectoryString {ub-domain-name-length} 30
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ID at-admd-name}
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pRMD OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {pRMDName}
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ID oc-prmd}
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pRMDName ATTRIBUTE ::= {
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SUBTYPE OF name
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WITH SYNTAX DirectoryString {ub-domain-name-length} 40
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ID at-prmd-name}
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mHSOrganization OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSOrganizationName }
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ID oc-mhs-organization}
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Kille Standards Track [Page 4]
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RFC 2294 Directory Information Tree March 1998
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mHSOrganizationName ATTRIBUTE ::= {
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SUBTYPE OF organizationName
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WITH SYNTAX DirectoryString {ub-organization-name-length} 50
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ID at-mhs-organization-name}
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mHSOrganizationalUnit OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSOrganizationalUnitName}
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ID oc-mhs-organizational-unit}
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mHSOrganizationalUnitName ATTRIBUTE ::= {
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SUBTYPE OF organizationalUnitName 60
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WITH SYNTAX DirectoryString {ub-organizational-unit-name-length}
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ID at-mhs-organizational-unit-name}
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mHSPerson OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSSurname}
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MAY CONTAIN {mHSGivenName|
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mHSInitials|
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mHSGenerationalQualifier}
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ID oc-mhs-person} 70
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mHSSurname ATTRIBUTE ::= {
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SUBTYPE OF surname
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WITH SYNTAX DirectoryString {ub-surname-length}
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ID at-mhs-surname}
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mHSGivenName ATTRIBUTE ::= {
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SUBTYPE OF givenName
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WITH SYNTAX DirectoryString {ub-given-name-length}
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ID at-mhs-given-name} 80
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mHSInitials ATTRIBUTE ::= {
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SUBTYPE OF initials
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WITH SYNTAX DirectoryString {ub-initials-length}
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ID at-mhs-initials}
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mHSGenerationQualifier ATTRIBUTE ::= {
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SUBTYPE OF generationQualifier
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WITH SYNTAX DirectoryString {ub-generation-qualifier-length}
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ID at-mhs-generation-qualifier} 90
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mHSNamedObject OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSCommonName}
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ID oc-mhs-named-object}
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Kille Standards Track [Page 5]
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RFC 2294 Directory Information Tree March 1998
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mHSCommonName ATTRIBUTE ::= {
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SUBTYPE OF commonName
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WITH SYNTAX DirectoryString {ub-common-name-length}
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ID at-mhs-common-name} 100
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mHSX121 OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSX121Address}
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ID oc-mhs-x121}
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mHSX121Address ATTRIBUTE ::= {
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SUBTYPE OF name
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WITH SYNTAX DirectoryString {ub-x121-address-length}
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ID at-x121-address} 110
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mHSDomainDefinedAttribute OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {
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mHSDomainDefinedAttributeType|
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mHSDomainDefinedAttributeValue}
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ID oc-mhs-domain-defined-attribute}
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mHSDomainDefinedAttributeType ATTRIBUTE ::= {
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SUBTYPE OF name 120
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WITH SYNTAX DirectoryString {ub-domain-defined-attribute-type-length}
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SINGLE VALUE
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ID at-mhs-domain-defined-attribute-type}
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mHSDomainDefinedAttributeValue ATTRIBUTE ::= {
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SUBTYPE OF name
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WITH SYNTAX DirectoryString {ub-domain-defined-attribute-value-length}
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SINGLE VALUE
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ID at-mhs-domain-defined-attribute-value}
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130
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mHSTerminalID OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSTerminalIDName}
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ID oc-mhs-terminal-id}
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mHSTerminalIDName ATTRIBUTE ::= {
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SUBTYPE OF name
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WITH SYNTAX DirectoryString {ub-terminal-id-length}
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ID at-mhs-terminal-id-name} 140
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Kille Standards Track [Page 6]
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RFC 2294 Directory Information Tree March 1998
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mHSNumericUserIdentifier OBJECT-CLASS ::= {
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SUBCLASS OF {top}
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MUST CONTAIN {mHSNumericUserIdentifierName}
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ID oc-mhs-numeric-user-id}
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mHSNumericeUserIdentifierName ATTRIBUTE ::= {
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SUBTYPE OF name
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WITH SYNTAX DirectoryString {ub-numeric-user-id-length} 150
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ID at-mhs-numeric-user-id-name}
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Figure 2: O/R Address Hierarchy
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The hierarchy is defined so that:
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1. The representation is defined so that it is straightforward to
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make a mechanical transformation in either direction. This
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requires that each node is named by an attribute whose type can
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determine the mapping.
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2. Where there are multiple domain defined attributes, the first
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in the sequence is the most significant.
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3. Physical Delivery (postal) addresses are not represented in
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this hierarchy. This is primarily because physical delivery can
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be handled by the Access Unit routing mechanisms defined in [4],
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and there is no need for this representation.
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4. Terminal and network forms of address are not handled, except
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for X.121 form, which is useful for addressing faxes.
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5. MHSCountry is defined as a subclass of Country, and so the
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same entry will be used for MHS Routing as for the rest of the
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DIT.
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6. The numeric country code will be an alias.
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7. ADMD will always be present in the hierarchy. This is true
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in the case of " " and of "0". This facilitates an easy
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mechanical transformation between the two forms of address.
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8. Each node is named by the relevant part of the O/R Address.
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9. Aliases may be used in other parts of the tree, in order to
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normalize alternate values. Where an alias is used, the value of
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the alias should be present as an alternate value in the node
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aliased to. Aliases may not be used for domain defined
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attributes.
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Kille Standards Track [Page 7]
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RFC 2294 Directory Information Tree March 1998
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10. Domain Defined Attributes are named by a multi-valued RDN
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(Relative Distinguished Name), consisting of the type and value.
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This is done so that standard attribute syntaxes can be used.
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11. Where an O/R Address has a valid Printable String and T.61 form,
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both must be present, with one as an alias for the other. This
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is so that direct lookup of the name will work, independent of
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the variant used. When both are present in an O/R Address being
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looked up, either may be used to construct the distinguished
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name.
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12. Personal name is handled by use of the mHSPerson object class.
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Each of the components of the personal name will be present in
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the relative distinguished name, which will usually be multi-
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valued.
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The relationship between X.400 O/R Addresses and the X.400 Entries
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(Attribute Type and Object Class) are given in Table 2. Where there
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are multiple Organizational Units or Domain Defined Attributes, each
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component is mapped onto a single X.500 entry.
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Note: When an X.121 address is used for addressing fax transmission,
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this may only be done relative to the PRMD or ADMD. This is in
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line with the current X.400 standards position. This means that
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it is not possible to use this form of addressing for an
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organizational or departmental fax gateway service.
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O/R Address Object Class Naming Attribute
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----------- ------------ ----------------
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C mHSCountry countryName
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or
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mHSNumericCountryName
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A aDMD aDMDName
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P pRMD pRMDName
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O mHSOrganization mHSOrganizationName
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OU/OU1/OU2 mHSOrganizationalUnit mHSOrganizationalUnitName
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OU3/OU4
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PN mHSPerson personName
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CN mHSNamedObject mHSCommonName
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X121 mHSX121 mHSX121Address
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T-ID mHSTerminalID mHSTerminalIDName
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UA-ID mHSNumericUserIdentifier mHSNumericUserIdentifierName
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DDA mHSDomainDefinedAttribute mHSDomainDefinedAttributeType
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and
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mHSDomainDefinedAttributeValue
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Table 2: O/R Address relationship to Directory Name
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Kille Standards Track [Page 8]
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RFC 2294 Directory Information Tree March 1998
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2 Notation
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O/R Addresses are written in the standard X.400 Notation.
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Distinguished Names use the string representation of distinguished
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names defined in [3]. The keywords used for the attributes defined
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in this specification are given in Table 3.
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3 Example Representation
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The O/R Address:
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I=S; S=Kille; OU1=CS; O=UCL,
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P=UK.AC; A=Gold 400; C=GB;
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would be represented in the directory as:
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MHS-I=S + MHS-S=Kille, MHS-OU=CS, MHS-O=UCL,
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Attribute Keyword
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--------- -------
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mHSNumericCountryName MHS-Numeric-Country
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aDMDName ADMD
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pRMDName PRMD
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mHSOrganizationName MHS-O
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mHSOrganizationalUnitName MHS-OU
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mHSSurname MHS-S
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mHSGivenName MHS-G
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mHSInitials MHS-I
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mHSGenerationalQualifier MHS-GQ
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mHSCommonName MHS-CN
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mHSX121Address MHS-X121
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mHSDomainDefinedAttributeType MHS-DDA-Type
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mHSDomainDefinedAttributeValue MHS-DDA-Value
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mHSTerminalIDName MHS-T-ID
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mHSNumericeUserIdentifierName MHS-UA-ID
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Table 3: Keywords for String DN Representation
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PRMD=UK.AC, ADMD=Gold 400, C=GB
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4 Mapping from O/R Address to Directory Name
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The primary application of this mapping is to take an X.400 encoded
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O/R Address and to generate an equivalent directory name. This
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mapping is only used for selected types of O/R Address:
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Kille Standards Track [Page 9]
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RFC 2294 Directory Information Tree March 1998
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o Mnemonic form
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o Numeric form
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o Terminal form, where country is present and X121 addressing
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is used
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Other forms of O/R address are handled by Access Unit mechanisms.
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The O/R Address is treated as an ordered list, with the order as
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defined in Table 1. For each O/R Address attribute, generate the
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equivalent directory naming attribute. In most cases, the mapping is
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mechanical. Printable String or Teletex encodings are chosen as
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appropriate. Where both forms are present in the O/R Address, either
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form may be used to generate the distinguished name. Both will be
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represented in the DIT. There are two special cases:
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1. A DDA generates a multi-valued RDN
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2. The Personal Name is mapped to a multi-valued RDN
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In many cases, an O/R Address will be provided, and only the higher
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components of the address will be represented in the DIT. In this
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case, the "longest possible match" should be returned.
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5 Mapping from Directory Name to O/R Address
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The reverse mapping is also needed in some cases. All of the naming
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attributes are unique, so the mapping is mechanically reversible.
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6 Acknowledgments
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Acknowledgments for work on this document are given in [4].
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References
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[1] The Directory --- overview of concepts, models and services,
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||
1993. CCITT X.500 Series Recommendations.
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[2] Kille, S., "MIXER (Mime Internet X.400 Enhanced Relay): Mapping
|
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between X.400 and RFC 822/MIME", RFC 2156, January 1998.
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[3] Kille, S., "A String Representation of Distinguished Names",
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RFC 1779, March 1995.
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[4] Kille, S., "Use of an X.500/LDAP directory to support MIXER address
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mapping", RFC 2164, January 1998.
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||
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||
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Kille Standards Track [Page 10]
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||
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RFC 2294 Directory Information Tree March 1998
|
||
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[5] Kille, S., "X.400-MHS use of the X.500 directory to support
|
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X.400-MHS routing", RFC 1801, June 1995.
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[6] CCITT recommendations X.400 / ISO 10021, April 1988. CCITT
|
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SG 5/VII / ISO/IEC JTC1, Message Handling: System and Service
|
||
Overview.
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||
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7 Security Considerations
|
||
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||
This protocol introduces no known security risks.
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||
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8 Author's Address
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||
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||
Steve Kille
|
||
Isode Ltd.
|
||
The Dome
|
||
The Square
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Richmond
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TW9 1DT
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England
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||
Phone: +44-181-332-9091
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||
EMail: S.Kille@ISODE.COM
|
||
|
||
X.400: I=S; S=Kille; P=ISODE; A=Mailnet; C=FI;
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||
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|
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|
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|
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|
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|
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|
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|
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|
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|
||
Kille Standards Track [Page 11]
|
||
|
||
RFC 2294 Directory Information Tree March 1998
|
||
|
||
|
||
A Object Identifier Assignment
|
||
|
||
mhs-ds OBJECT IDENTIFIER ::= {iso(1) org(3) dod(6) internet(1) private(4)
|
||
enterprises(1) isode-consortium (453) mhs-ds (7)}
|
||
|
||
|
||
tree OBJECT IDENTIFIER ::= {mhs-ds 2}
|
||
|
||
oc OBJECT IDENTIFIER ::= {tree 1}
|
||
at OBJECT IDENTIFIER ::= {tree 2}
|
||
|
||
oc-admd OBJECT IDENTIFIER ::= {oc 1} 10
|
||
oc-mhs-country OBJECT IDENTIFIER ::= {oc 2}
|
||
oc-mhs-domain-defined-attribute OBJECT IDENTIFIER ::= {oc 3}
|
||
oc-mhs-named-object OBJECT IDENTIFIER ::= {oc 4}
|
||
oc-mhs-organization OBJECT IDENTIFIER ::= {oc 5}
|
||
oc-mhs-organizational-unit OBJECT IDENTIFIER ::= {oc 6}
|
||
oc-mhs-person OBJECT IDENTIFIER ::= {oc 7}
|
||
oc-mhs-x121 OBJECT IDENTIFIER ::= {oc 8}
|
||
oc-prmd OBJECT IDENTIFIER ::= {oc 9}
|
||
oc-mhs-terminal-id OBJECT IDENTIFIER ::= {oc 10}
|
||
oc-mhs-numeric-user-id OBJECT IDENTIFIER ::= {oc 11} 20
|
||
|
||
at-admd-name OBJECT IDENTIFIER ::= {at 1}
|
||
at-mhs-common-name OBJECT IDENTIFIER ::= {at 2}
|
||
at-mhs-domain-defined-attribute-type OBJECT IDENTIFIER ::= {at 3}
|
||
at-mhs-domain-defined-attribute-value OBJECT IDENTIFIER ::= {at 4}
|
||
at-mhs-numeric-country-name OBJECT IDENTIFIER ::= {at 5}
|
||
at-mhs-organization-name OBJECT IDENTIFIER ::= {at 6}
|
||
at-mhs-organizational-unit-name OBJECT IDENTIFIER ::= {at 7}
|
||
at-prmd-name OBJECT IDENTIFIER ::= {at 10}
|
||
at-x121-address OBJECT IDENTIFIER ::= {at 12} 30
|
||
at-mhs-terminal-id-name OBJECT IDENTIFIER ::= {at 13}
|
||
at-mhs-numeric-user-id-name OBJECT IDENTIFIER ::= {at 14}
|
||
at-mhs-surname OBJECT IDENTIFIER ::= {at 15}
|
||
at-mhs-given-name OBJECT IDENTIFIER ::= {at 16}
|
||
at-mhs-initials OBJECT IDENTIFIER ::= {at 17}
|
||
at-mhs-generation-qualifier OBJECT IDENTIFIER ::= {at 18}
|
||
|
||
Figure 3: Object Identifier Assignment
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
Kille Standards Track [Page 12]
|
||
|
||
RFC 2294 Directory Information Tree March 1998
|
||
|
||
|
||
Full Copyright Statement
|
||
|
||
Copyright (C) The Internet Society (1998). All Rights Reserved.
|
||
|
||
This document and translations of it may be copied and furnished to
|
||
others, and derivative works that comment on or otherwise explain it
|
||
or assist in its implementation may be prepared, copied, published
|
||
and distributed, in whole or in part, without restriction of any
|
||
kind, provided that the above copyright notice and this paragraph are
|
||
included on all such copies and derivative works. However, this
|
||
document itself may not be modified in any way, such as by removing
|
||
the copyright notice or references to the Internet Society or other
|
||
Internet organizations, except as needed for the purpose of
|
||
developing Internet standards in which case the procedures for
|
||
copyrights defined in the Internet Standards process must be
|
||
followed, or as required to translate it into languages other than
|
||
English.
|
||
|
||
The limited permissions granted above are perpetual and will not be
|
||
revoked by the Internet Society or its successors or assigns.
|
||
|
||
This document and the information contained herein is provided on an
|
||
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
|
||
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
|
||
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
|
||
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
|
||
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
Kille Standards Track [Page 13]
|
||
|