rfc2294.txt

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       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.

   5.  MHSCountry is defined as a subclass of Country, and so the
       same entry will be used for MHS Routing as for the rest of the
       DIT.

   6.  The numeric country code will be an alias.

   7.  ADMD will always be present in the hierarchy.  This is true
       in the case of " " and of "0".  This facilitates an easy
       mechanical transformation between the two forms of address.

   8.  Each node is named by the relevant part of the O/R Address.

   9.  Aliases may be used in other parts of the tree, in order to
       normalize alternate values.  Where an alias is used, the value of
       the alias should be present as an alternate value in the node
       aliased to.  Aliases may not be used for domain defined
       attributes.




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   10. Domain Defined Attributes are named by a multi-valued RDN
       (Relative Distinguished Name), consisting of the type and value.
       This is done so that standard attribute syntaxes can be used.

   11. Where an O/R Address has a valid Printable String and T.61 form,
       both must be present, with one as an alias for the other.  This
       is so that direct lookup of the name will work, independent of
       the variant used.  When both are present in an O/R Address being
       looked up, either may be used to construct the distinguished
       name.

   12. Personal name is handled by use of the mHSPerson object class.
       Each of the components of the personal name will be present in
       the relative distinguished name, which will usually be multi-
       valued.

   The relationship between X.400 O/R Addresses and the X.400 Entries
   (Attribute Type and Object Class) are given in Table 2.  Where there
   are multiple Organizational Units or Domain Defined Attributes, each
   component is mapped onto a single X.500 entry.

   Note: When an X.121 address is used for addressing fax transmission,
       this may only be done relative to the PRMD or ADMD. This is in
       line with the current X.400 standards position.  This means that
       it is not possible to use this form of addressing for an
       organizational or departmental fax gateway service.

O/R Address  Object Class               Naming Attribute
-----------  ------------               ----------------
C            mHSCountry                 countryName
                                        or
                                        mHSNumericCountryName
A            aDMD                       aDMDName
P            pRMD                       pRMDName
O            mHSOrganization            mHSOrganizationName
OU/OU1/OU2   mHSOrganizationalUnit      mHSOrganizationalUnitName
OU3/OU4
PN           mHSPerson                  personName
CN           mHSNamedObject             mHSCommonName
X121         mHSX121                    mHSX121Address
T-ID         mHSTerminalID              mHSTerminalIDName
UA-ID        mHSNumericUserIdentifier   mHSNumericUserIdentifierName
DDA          mHSDomainDefinedAttribute  mHSDomainDefinedAttributeType
                                        and
                                        mHSDomainDefinedAttributeValue


          Table 2:  O/R Address relationship to Directory Name



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2  Notation

   O/R Addresses are written in the standard X.400 Notation.
   Distinguished Names use the string representation of distinguished
   names defined in [3].  The keywords used for the attributes defined
   in this specification are given in Table 3.

3  Example Representation

   The O/R Address:

   I=S; S=Kille; OU1=CS; O=UCL,
   P=UK.AC; A=Gold 400; C=GB;


   would be represented in the directory as:

   MHS-I=S + MHS-S=Kille, MHS-OU=CS, MHS-O=UCL,


            Attribute                       Keyword
            ---------                       -------
            mHSNumericCountryName           MHS-Numeric-Country
            aDMDName                        ADMD
            pRMDName                        PRMD
            mHSOrganizationName             MHS-O
            mHSOrganizationalUnitName       MHS-OU
            mHSSurname                      MHS-S
            mHSGivenName                    MHS-G
            mHSInitials                     MHS-I
            mHSGenerationalQualifier        MHS-GQ
            mHSCommonName                   MHS-CN
            mHSX121Address                  MHS-X121
            mHSDomainDefinedAttributeType   MHS-DDA-Type
            mHSDomainDefinedAttributeValue  MHS-DDA-Value
            mHSTerminalIDName               MHS-T-ID
            mHSNumericeUserIdentifierName   MHS-UA-ID

              Table 3:  Keywords for String DN Representation


   PRMD=UK.AC, ADMD=Gold 400, C=GB

4  Mapping from O/R Address to Directory Name

   The primary application of this mapping is to take an X.400 encoded
   O/R Address and to generate an equivalent directory name.  This
   mapping is only used for selected types of O/R Address:



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    o  Mnemonic form

    o  Numeric form

    o  Terminal form, where country is present and X121 addressing
       is used

   Other forms of O/R address are handled by Access Unit mechanisms.
   The O/R Address is treated as an ordered list, with the order as
   defined in Table 1.  For each O/R Address attribute, generate the
   equivalent directory naming attribute.  In most cases, the mapping is
   mechanical.  Printable String or Teletex encodings are chosen as
   appropriate.  Where both forms are present in the O/R Address, either
   form may be used to generate the distinguished name.  Both will be
   represented in the DIT. There are two special cases:

   1.  A DDA generates a multi-valued RDN

   2.  The Personal Name is mapped to a multi-valued RDN

   In many cases, an O/R Address will be provided, and only the higher
   components of the address will be represented in the DIT. In this
   case, the "longest possible match" should be returned.

5  Mapping from Directory Name to O/R Address

   The reverse mapping is also needed in some cases.  All of the naming
   attributes are unique, so the mapping is mechanically reversible.

6  Acknowledgments

   Acknowledgments for work on this document are given in [4].

References

   [1] The Directory --- overview of concepts, models and services,
       1993. CCITT X.500 Series Recommendations.

   [2] Kille, S., "MIXER (Mime Internet X.400 Enhanced Relay): Mapping
       between X.400 and RFC 822/MIME", RFC 2156, January 1998.

   [3] Kille, S., "A String Representation of Distinguished Names",
       RFC 1779, March 1995.

   [4] Kille, S., "Use of an X.500/LDAP directory to support MIXER address
       mapping", RFC 2164, January 1998.





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   [5] Kille, S., "X.400-MHS use of the X.500 directory to support
       X.400-MHS routing", RFC 1801, June 1995.

   [6] CCITT recommendations X.400 / ISO 10021, April 1988. CCITT
       SG 5/VII / ISO/IEC JTC1, Message Handling:  System and Service
       Overview.

7  Security Considerations

   This protocol introduces no known security risks.

8  Author's Address

   Steve Kille
   Isode Ltd.
   The Dome
   The Square
   Richmond
   TW9 1DT
   England

   Phone:  [phone]
   EMail:  [e-mail]

   X.400:  I=S; S=Kille; P=ISODE; A=Mailnet; C=FI;


























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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











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