ISO/IEC 9594-7:2020/Amd 1:2025
(Amendment)Information technology - Open systems interconnection - Part 7: The Directory: Selected object classes - Amendment 1: Miscellaneous enhancements
Information technology - Open systems interconnection - Part 7: The Directory: Selected object classes - Amendment 1: Miscellaneous enhancements
Technologies de l'information — Interconnexion de systèmes ouverts (OSI) — Partie 7: Titre manque — Amendement 1: Titre manque
General Information
- Status
- Published
- Publication Date
- 18-May-2025
- Drafting Committee
- ISO/IEC JTC 1/SC 6/WG 10 - Directory, ASN.1 and Registration
- Current Stage
- 6060 - International Standard published
- Start Date
- 19-May-2025
- Due Date
- 22-Jun-2025
- Completion Date
- 19-May-2025
Relations
- Effective Date
- 23-Dec-2023
Overview
ISO/IEC 9594-7:2020/Amd 1:2025 is the first amendment to the ninth edition of the international standard ISO/IEC 9594-7, which covers Information Technology - Open Systems Interconnection (OSI) - The Directory: Selected Object Classes. This amendment introduces miscellaneous enhancements focusing primarily on improving the modular separation between cybersecurity ASN.1 modules and directory ASN.1 modules. Developed collaboratively by ISO, IEC, and ITU-T, this standard update supports more streamlined directory information services, crucial in global telecommunications and information exchange systems.
By providing updated definitions and imports for object classes and attribute types used in directory services, this standard helps clarify and refine mechanisms for managing directory entries in networked environments, ensuring greater interoperability and security in digital communications infrastructure.
Key Topics
Selected Object Classes Enhancements
Amendment 1 revises and updates the import section of Annex A concerning selected object classes, improving clarity and structure for better maintainability and implementation.ASN.1 Module Separation
The update enables better separation between cybersecurity ASN.1 modules and directory ASN.1 modules, facilitating clearer integration paths for directory services and security functions.Comprehensive Attribute Imports
The amendment outlines imports from various relevant ITU-T Recommendations and ISO/IEC standards such as:- Rec. ITU-T X.501 / ISO/IEC 9594-2 for useful definitions like top-level object classes.
- Rec. ITU-T X.520 / ISO/IEC 9594-6 for selected attribute types including organizational names, country names, and telephone numbers.
- Rec. ITU-T X.509 / ISO/IEC 9594-8 for authentication and certificate management attributes.
Collaboration and Standardization Process
The standard reflects cooperation between ISO, IEC, and ITU to harmonize directory standards with global telecommunications and cybersecurity frameworks.
Applications
Directory Services
ISO/IEC 9594-7:2020/Amd 1:2025 is critical for directory systems that store, retrieve, and manage information about networked resources, users, and services. It supports standardized schemas utilized in LDAP (Lightweight Directory Access Protocol) and other directory protocols.Cybersecurity and Identity Management
By separating directory and cybersecurity ASN.1 modules, this amendment facilitates enhanced security postures in directory services, contributing to robust identity management, authentication, and access control in network architectures.Telecommunications Infrastructure
Implementations reliant on OSI standards for information exchange benefit from the amendments as they improve interoperability for telecommunication service providers and infrastructure vendors worldwide.Enterprise IT Systems
Organizations leveraging directory services for internal user information, organizational unit hierarchies, and resource descriptions can adopt this amendment for improved schema compliance and compatibility with international standards.
Related Standards
ISO/IEC 9594-2 (Rec. ITU-T X.501) – Directory: Models
Defines the basic directory model and foundational object class and attribute types referenced by ISO/IEC 9594-7.ISO/IEC 9594-6 (Rec. ITU-T X.520) – Directory: Selected Attribute Types
Provides the attribute types used within directory entries, facilitating consistency in data representation.ISO/IEC 9594-8 (Rec. ITU-T X.509) – Directory: Authentication Framework
Establishes the standards for public key certificates, certificate revocation lists, and related authentication constructs.ISO/IEC Directives, Part 1
Describes procedures for developing and maintaining ISO and IEC standards, pertinent for understanding the amendment process.
By aligning with these foundational standards, ISO/IEC 9594-7:2020/Amd 1:2025 ensures comprehensive and interoperable directory service specification, vital for secure and efficient information technology and telecommunications systems worldwide.
Keywords: ISO/IEC 9594-7 amendment, open systems interconnection directory, ASN.1 modules, selected object classes, directory services standard, cybersecurity enhancements, LDAP directory schema, ITU-T X.521 amendment, telecommunications standards, directory attribute imports, international directory service standards.
Frequently Asked Questions
ISO/IEC 9594-7:2020/Amd 1:2025 is a standard published by the International Organization for Standardization (ISO). Its full title is "Information technology - Open systems interconnection - Part 7: The Directory: Selected object classes - Amendment 1: Miscellaneous enhancements". This standard covers: Information technology - Open systems interconnection - Part 7: The Directory: Selected object classes - Amendment 1: Miscellaneous enhancements
Information technology - Open systems interconnection - Part 7: The Directory: Selected object classes - Amendment 1: Miscellaneous enhancements
ISO/IEC 9594-7:2020/Amd 1:2025 is classified under the following ICS (International Classification for Standards) categories: 35.100.70 - Application layer. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO/IEC 9594-7:2020/Amd 1:2025 has the following relationships with other standards: It is inter standard links to ISO/IEC 9594-7:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO/IEC 9594-7:2020/Amd 1:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
International
Standard
ISO/IEC 9594-7
Ninth edition
Information technology — Open
2020-11
systems interconnection —
AMENDMENT 1
Part 7:
2025-05
The Directory: Selected object classes
AMENDMENT 1: Miscellaneous
enhancements
Reference number
ISO/IEC 9594-7:2020/Amd. 1:2025(en) © ISO/IEC 2025
ISO/IEC 9594-7:2020/Amd. 1:2025(en)
© ISO/IEC 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
© ISO/IEC 2025 – All rights reserved
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ISO/IEC 9594-7:2020/Amd. 1:2025(en)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of document should be noted.
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had
not received notice of (a) patent(s) which may be required to implement this document. However,
implementers are cautioned that this may not represent the latest information, which may be obtained
from the patent database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall
not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT)
see www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by ITU-T as ITU-T X.521 (2019) Amd. 1 (10/2024) and drafted in
accordance with its editorial rules, in collaboration with Joint Technical Committee ISO/IEC JTC
1, Information technology, Subcommittee SC 6, Telecommunications and information
exchange between systems.
A list of all parts in the ISO/IEC 9594 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards body.
A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.
Rec. ITU-T X.521 (2019) Amd. 1 (10/2024)
© ISO/IEC 2025 – All rights reserved
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ISO/IEC 9594-6:2020/Amd. 1:2025(en)
INTERNATIONAL STANDARD ISO/IEC 9594-7
RECOMMENDATION ITU-T X.521
Information technology – Open Systems Interconnection – The Directory:
Selected object classes
Amendment 1
Miscellaneous enhancements
Summary
Amendment 1 to Recommendation ITU-T X.521 (2019) | International Standard ISO/IEC 9594-7:2020 introduces text
updates to facilitate separation between cybersecurity ASN.1 modules and directory ASN.1 modules.
History
Edition Recommendation Approval Study Group Unique ID
1.0 ITU-T X.521 1988-11-25 11.1002/1000/3012
2.0 ITU-T X.521 1993-11-16 7 11.1002/1000/3013
3.0 ITU-T X.521 1997-08-09 7 11.1002/1000/4128
3.1 ITU-T X.521 (1997) Amd. 1 2000-03-31 7 11.1002/1000/5043
3.2 ITU-T X.521 (1997) Technical Cor. 1 2001-02-02 7 11.1002/1000/5325
4.0 ITU-T X.521 2001-02-02 7 11.1002/1000/5326
5.0 ITU-T X.521 2005-08-29 17 11.1002/1000/8509
5.1 ITU-T X.521 (2005) Cor. 1 2012-04-13 17 11.1002/1000/11592
6.0 ITU-T X.521 2008-11-13 17 11.1002/1000/9599
6.1 ITU-T X.521 (2008) Cor. 1 2012-04-13 17 11.1002/1000/11593
7.0 ITU-T X.521 2012-10-14 17 11.1002/1000/11744
8.0 ITU-T X.521 2016-10-14 17 11.1002/1000/13037
9.0 ITU-T X.521 2019-10-14 17 11.1002/1000/14038
9.1 ITU-T X.521 (2019) Amd. 1 2024-10-29 17 11.1002/1000/16177
To access the Recommendation, type the URL https://handle.itu.int/ in the address field of your web browser, followed by the
Recommendation's unique ID.
Rec. ITU-T X.521 (2019) Amd. 1 (10/2024)
© ISO/IEC 2025 – All rights reserved
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ISO/IEC 9594-7:2020/Amd. 1:2025(en)
FOREWORD
The International Telecommun
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