Representing the O/R Address hierarchy in the X.500 Directory Information Tree
RFC 1836

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Network Working Group                                           S. Kille
Request for Comments: 1836                              ISODE Consortium
Category: Experimental                                       August 1995

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

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  This memo does not specify an Internet standard of any
   kind.  Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

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].

                 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

Kille                         Experimental                      [Page 1]
RFC 1836             O/R Addresses in the X.500 DIT          August 1995

   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.

                                  /\
                                 /   \
                    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                         Experimental                      [Page 2]
RFC 1836             O/R Addresses in the X.500 DIT          August 1995

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 ::= {
    SUBCLASS OF {country}
    MAY CONTAIN {mHSNumericCountryName}
    ID oc-mhs-country}

mHSNumericCountryName ATTRIBUTE ::= {
    WITH SYNTAX NumericString (SIZE (1..ub-country-name-numeric-length))
    SINGLE VALUE                                                    20
    ID at-mhs-numeric-country-name}

aDMD OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {aDMDName}
    ID oc-admd}

aDMDName ATTRIBUTE ::= {
    SUBTYPE OF name
    WITH SYNTAX DirectoryString {ub-domain-name-length}             30