|
Network Working Group Request for Comments: 1836 Category: Experimental |
S. Kille ISODE Consortium August 1995 |
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.
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:
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
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.
/\
/ \
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
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}
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}
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}
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 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 organisational or departmental fax gateway service.
----------- ------------ ----------------
Table 2: O/R Address relationship to Directory Name
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.
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
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:
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:
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.
The reverse mapping is also needed in some cases. All of the naming attributes are unique, so the mapping is mechanically reversible.
Acknowledgements for work on this document are given in [4].
[1] The Directory --- overview of concepts, models and services, 1993. CCITT X.500 Series Recommendations.
[2] Kille, S., "Mapping between X.400(1988)/ISO 10021 and RFC 822", RFC 1327, Department of Computer Science, University College London, May 1992.
[3] Kille, S., "A String Representation of Distinguished Names", RFC 1779, Department of Computer Science, University College London, March 1995.
[4] Kille, S., "MHS Use of the X.500 Directory to Support MHS Routing, RFC 1801, ISODE Consortium, June 1995.
[5] Kille, S., "Use of the X.500 Directory to Support Mapping between X.400 and RFC 822 Addresses, RFC 1838, ISODE Consortium, August 1995.
[6] CCITT recommendations X.400 / ISO 10021, April 1988. CCITT SG 5/VII / ISO/IEC JTC1, Message Handling: System and Service Overview.
Security issues are not discussed in this memo.
Steve Kille
ISODE Consortium
The Dome
The Square
Richmond
TW9 1DT
England
Phone: +44-81-332-9091
Internet EMail: S.Kille@ISODE.COM
DN: CN=Steve Kille,
O=ISODE Consortium, C=GB
UFN: S. Kille, ISODE Consortium, GB
-----------------------------------------------------------------------
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