rfc1836.txt

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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



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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




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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
    ID at-admd-name}

pRMD OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {pRMDName}
    ID oc-prmd}

pRMDName ATTRIBUTE ::= {
    SUBTYPE OF name
    WITH SYNTAX DirectoryString {ub-domain-name-length}             40
    ID at-prmd-name}

mHSOrganization OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSOrganizationName }
    ID oc-mhs-organization}





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RFC 1836             O/R Addresses in the X.500 DIT          August 1995


mHSOrganizationName ATTRIBUTE ::= {
    SUBTYPE OF organizationName
    WITH SYNTAX DirectoryString {ub-organization-name-length}       50
    ID at-mhs-organization-name}

mHSOrganizationalUnit OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSOrganizationalUnitName}
    ID oc-mhs-organizational-unit}

mHSOrganizationalUnitName ATTRIBUTE ::= {
    SUBTYPE OF organizationalUnitName                               60
    WITH SYNTAX DirectoryString {ub-organizational-unit-name-length}
    ID at-mhs-organizational-unit-name}

mHSPerson OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSSurname}
    MAY CONTAIN {mHSGivenName|
                mHSInitials|
                mHSGenerationalQualifier}
    ID oc-mhs-person}                                               70

mHSSurname ATTRIBUTE ::= {
    SUBTYPE OF surname
    WITH SYNTAX DirectoryString {ub-surname-lenght}
    ID at-mhs-surname}

mHSGivenName ATTRIBUTE ::= {
    SUBTYPE OF givenName
    WITH SYNTAX DirectoryString {ub-given-name-length}
    ID at-mhs-given-name}                                           80

mHSInitials ATTRIBUTE ::= {
    SUBTYPE OF initials
    WITH SYNTAX DirectoryString {ub-initials-length}
    ID at-mhs-initials}

mHSGenerationQualifier ATTRIBUTE ::= {
    SUBTYPE OF generationQualifier
    WITH SYNTAX DirectoryString {ub-generation-qualifier-length}
    ID at-mhs-generation-qualifier}                                 90

mHSNamedObject OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSCommonName}
    ID oc-mhs-named-object}




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RFC 1836             O/R Addresses in the X.500 DIT          August 1995


mHSCommonName ATTRIBUTE ::= {
    SUBTYPE OF commonName
    WITH SYNTAX DirectoryString {ub-common-name-length}
    ID at-mhs-common-name}                                         100

mHSX121 OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSX121Address}
    ID oc-mhs-x121}

mHSX121Address ATTRIBUTE ::= {
    SUBTYPE OF name
    WITH SYNTAX DirectoryString {ub-x121-address-length}
    ID at-x121-address}                                            110

mHSDomainDefinedAttribute OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {
        mHSDomainDefinedAttributeType|
        mHSDomainDefinedAttributeValue}
    ID oc-mhs-domain-defined-attribute}

mHSDomainDefinedAttributeType ATTRIBUTE ::= {
    SUBTYPE OF name                                                120
    WITH SYNTAX DirectoryString {ub-domain-defined-attribute-type-length}
    SINGLE VALUE
    ID at-mhs-domain-defined-attribute-type}

mHSDomainDefinedAttributeValue ATTRIBUTE ::= {
    SUBTYPE OF name
    WITH SYNTAX DirectoryString {ub-domain-defined-attribute-value-length}
    SINGLE VALUE
    ID at-mhs-domain-defined-attribute-value}
                                                                   130
mHSTerminalID OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSTerminalIDName}
    ID oc-mhs-terminal-id}

mHSTerminalIDName ATTRIBUTE ::= {
    SUBTYPE OF name
    WITH SYNTAX DirectoryString {ub-terminal-id-length}
    ID at-mhs-terminal-id-name}                                    140

mHSNumericUserIdentifier OBJECT-CLASS ::= {
    SUBCLASS OF {top}
    MUST CONTAIN {mHSNumericUserIdentifierName}
    ID oc-mhs-numeric-user-id}



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RFC 1836             O/R Addresses in the X.500 DIT          August 1995


mHSNumericeUserIdentifierName ATTRIBUTE ::= {
    SUBTYPE OF name
    WITH SYNTAX DirectoryString {ub-numeric-user-id-length}        150
    ID at-mhs-numeric-user-id-name}

                    Figure 2:  O/R_Address Hierarchy

The hierarchy is defined so that:

1.  The representation is defined so that it is straightforward to
    make a mechanical transformation in either direction.  This
    requires that each node is named by an attribute whose type can
    determine the mapping.

2.  Where there are multiple domain defined attributes, the first in
    the sequence is the most significant.

3.  Physical Delivery (postal) addresses are not represented in this
    hierarchy.  This is primarily because physical delivery can be
    handled by the Access Unit routing mechanisms defined in [4], and
    there is no need for this representation.

4.  Terminal and network forms of address are not handled, except for
    X.121 form, which is useful for addressing faxes.