Representing the O/R Address hierarchy in the X.500 Directory Information Tree
RFC 2294

Document Type RFC - Proposed Standard (March 1998; No errata)
Obsoletes RFC 1836
Last updated 2013-03-02
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Network Working Group                                            S. Kille
Request for Comments: 2294                                     Isode Ltd.
Obsoletes: 1836                                                March 1998
Category: Standards Track

             Representing the O/R Address hierarchy in the
                    X.500 Directory Information Tree

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Abstract

   This document defines a representation of the O/R Address hierarchy
   in the Directory Information Tree [6, 1].  This is useful for a range
   of purposes, including:

    o  Support for MHS Routing [4].

    o  Support for X.400/RFC 822 address mappings [2, 5].

   Please send comments to the author or to the discussion group <mhs-
   ds@mercury.udev.cdc.com>.

Kille                       Standards Track                     [Page 1]
RFC 2294               Directory Information Tree             March 1998

                 Object Class               Mandatory
                 ------------               ---------
                 mHSCountry                 M
                 aDMD                       M
                 pRMD                       O
                 mHSX121                    O
                 mHSNumericUserIdentifier   O
                 mHSOrganization            O
                 mHSOrganizationalUnit      O
                 mHSPerson                  O
                 mHSNamedObject             O
                 mHSTerminalID              O
                 mHSDomainDefinedAttribute  O

         Table 1:  Order of O/R Address Directory Components

1  The O/R Address Hierarchy

   An O/R Address hierarchy is represented in the X.500 directory by
   associating directory name components with O/R Address components.
   An example of this is given in Figure 1.  The object classes and
   attributes required to support this representation are defined in
   Figure 2.  The schema, which defines the hierarchy in which these
   objects are represented in the directory information tree is
   specified in Table 1.  A given object class defined in the table will
   always be higher in the DIT than an object class defined lower down
   the table.  Valid combinations of O/R Address components are defined
   in X.400.

Kille                       Standards Track                     [Page 2]
RFC 2294               Directory Information Tree             March 1998

                                  /\
                                 /   \
                    C=GB        /      \   Numeric-C=234
                               /         \
                              /            \
                             /               \
                +------------+<----------------+----+
                | Country    |                 |    |
                +------------+                 +----+
                     /\
                    /   \
                   /      \
                  /         \
     ADMD=" "    /            \  ADMD=Gold 400
     +-------------+         +------------+
     |   ADMD      |         |   ADMD     |
     +-------------+         +------------+
           \                     \
             \                     \
               \ PRMD=UK.AC          \ PRMD=UK.AC
                 \                     \
                +----------+             +----+
                |  PRMD    |< -----------|    |
                +----------+             +----+
                     /
                    /
                 O=UCL
                  /
                 /
     +------------+
     | MHS-Org    |
     +------------+
          \
            \  OU=CS
              \
                \
              +-----------+
              | MHS-OU    |
              +-----------+

                    Figure 1:  Example O/R Address Tree

Kille                       Standards Track                     [Page 3]
RFC 2294               Directory Information Tree             March 1998

IMPORTS
  ub-domain-name-length, ub-organization-name-length,
  ub-organizational-unit-name-length, ub-common-name-length,
  ub-x121-address-length, ub-domain-defined-attribute-type-length,
  ub-domain-defined-attribute-value-length, ub-terminal-id-length,
  ub-numeric-user-id-length, ub-country-name-numeric-length,
  ub-surname-length, ub-given-name-length,  ub-initials-length,
  ub-generation-qualifier-length

    FROM MTSUpperBounds {joint-iso-ccitt mhs-motis(6) mts(3)        10
        modules(0) upper-bounds(3) };

mHSCountry OBJECT-CLASS ::= {
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