📄 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.Kille Standards Track [Page 7]RFC 2294 Directory Information Tree March 1998 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 mHSNumericCountryNameA aDMD aDMDNameP pRMD pRMDNameO mHSOrganization mHSOrganizationNameOU/OU1/OU2 mHSOrganizationalUnit mHSOrganizationalUnitNameOU3/OU4PN mHSPerson personNameCN mHSNamedObject mHSCommonNameX121 mHSX121 mHSX121AddressT-ID mHSTerminalID mHSTerminalIDNameUA-ID mHSNumericUserIdentifier mHSNumericUserIdentifierNameDDA mHSDomainDefinedAttribute mHSDomainDefinedAttributeType and mHSDomainDefinedAttributeValue Table 2: O/R Address relationship to Directory NameKille Standards Track [Page 8]RFC 2294 Directory Information Tree March 19982 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=GB4 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:Kille Standards Track [Page 9]RFC 2294 Directory Information Tree March 1998 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.Kille Standards Track [Page 10]RFC 2294 Directory Information Tree March 1998 [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: +44-181-332-9091 EMail: S.Kille@ISODE.COM X.400: I=S; S=Kille; P=ISODE; A=Mailnet; C=FI;Kille Standards Track [Page 11]RFC 2294 Directory Information Tree March 1998A Object Identifier Assignmentmhs-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} 10oc-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} 20at-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} 30at-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 AssignmentKille Standards Track [Page 12]RFC 2294 Directory Information Tree March 1998Full 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]
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