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ISO/IEC 9594-2:2020/Amd 1:2021

(Amendment)

Information technology — Open systems interconnection — Part 2: The Directory: Models — Amendment 1

Information technology — Open systems interconnection — Part 2: The Directory: Models — Amendment 1

Technologies de l'information — Interconnexion de systèmes ouverts (OSI) — Partie 2: Titre manque — Amendement 1

General Information

Status
Published
Publication Date
16-Dec-2021
ICS
35.100.70 - Application layer
Technical Committee
ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
Drafting Committee
ISO/IEC JTC 1/SC 6/WG 10 - Directory, ASN.1 and Registration
Current Stage
6060 - International Standard published
Start Date
17-Dec-2021
Due Date
02-Feb-2023
Completion Date
17-Dec-2021
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Amends
ISO/IEC 9594-2:2020 - Information technology — Open systems interconnection — Part 2: The Directory: Models
Effective Date
24-Apr-2021

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ISO/IEC 9594-2:2020/Amd 1:2021ISO/IEC 9594-2:2020/Amd 1:2021
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INTERNATIONAL ISO/IEC
STANDARD 9594-2
Ninth edition
2020-11
AMENDMENT 1
Ninth edition
2021-12
Information technology — Open
systems interconnection —
Part 2:
The Directory: Models
AMENDMENT 1
Reference number
ISO/IEC 9594-2:2020/Amd. 1:2021(E)
© ISO/IEC 2021

---------------------- Page: 1 ----------------------
ISO/IEC 9594-2:2020/Amd. 1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
 © ISO/IEC 2021 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC 9594-2:2020/Amd 1:2021(E)
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. This document was drafted in accordance with the editorial
rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or
www.iec.ch/members_experts/refdocs).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Details
of any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC list of patent
declarations received (see https://patents.iec.ch).
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 REC. X.501 (2019) – Amendment 1] 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.
© ISO/IEC 2021 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/IEC 9594-2:2020/Amd. 1:2021(E)
Information Technology – Open systems Interconnection – The Directory: Models
Amendment 1
Miscellaneous enhancements
Summary
Amendment 1 to Rec. ITU-T X.501 (2019) | ISO/IEC 9594-2:2020 updates clause 9.2 and Annex A.
The amendment has successfully gone through the enquiry state at ISO/IEC and ISO/IEC does not anymore accept any
technical comments. ITU-T SG 17 members have been part of the ISO/IEC ballot process and have had ample opportunities
in the past to influence the technical content.
History
*
Edition Recommendation Approval Study Group Unique ID
1.0 ITU-T X.501 1988-11-25 11.1002/1000/2997
2.0 ITU-T X.501 1993-11-16 7 11.1002/1000/2998
3.0 ITU-T X.501 1997-08-09 7 11.1002/1000/4122
3.1 ITU-T X.501 (1997) Technical Cor. 1 2000-03-31 7 11.1002/1000/5031
3.2 ITU-T X.501 (1997) Amd. 1 2000-03-31 7 11.1002/1000/5030
3.3 ITU-T X.501 (1997) Technical Cor. 2 2001-02-02 7 11.1002/1000/5308
3.4 ITU-T X.501 (1997) Technical Cor. 3 2005-05-14 17 11.1002/1000/8499
4.0 ITU-T X.501 2001-02-02 7 11.1002/1000/5310
4.1 ITU-T X.501 (2001) Technical Cor. 1 2005-05-1
...

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