IEC TS 61850-7-7:2018/AMD1:2023

Amendment 1 - Communication networks and systems for power utility automation - Part 7-7: Machine-processable format of IEC 61850-related data models for tools

The content of the corrigendum 1 (2025-05) has been included in this copy.

General Information

• Status: Published
• Publication Date: 15-Jan-2023
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: TC 57 - Power systems management and associated information exchange
• Drafting Committee: WG 10 - TC 57/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 16-Jan-2023
• Completion Date: 14-Feb-2023

Relations

• Amends: IEC TS 61850-7-7:2018 - Communication networks and systems for power utility automation - Part 7-7: Machine-processable format of IEC 61850-related data models for tools
• Effective Date: 05-Sep-2023
• Corrected By: IEC TS 61850-7-7:2018/AMD1:2023/COR1:2025 - Corrigendum 1 - Amendment 1 - Communication networks and systems for power utility automation - Part 7-7: Machine-processable format of IEC 61850-related data models for tools
• Effective Date: 26-Oct-2025

Overview

IEC TS 61850-7-7:2018/AMD1:2023 is an amendment to the IEC Technical Specification that addresses the machine-processable format of data models related to IEC 61850 for power utility automation systems. Developed by the International Electrotechnical Commission (IEC) Technical Committee 57, this amendment advances the capability for tools to manage and process standardized data models using Extensible Markup Language (XML). Included in this version are updates to namespace management, compatibility rules, and the handling of machine-processable formats-enhancing interoperability and integration across systems. The corrigendum 1 (2025-05) has been incorporated into this edition.

Key Topics

• Machine-Processable Data Models: Specification of an XML-based format known as Namespace Definition (NSD) to enable automated tools to interpret and process IEC 61850-related data models efficiently.
• Namespaces and Versioning: Enhanced support for namespace identification, schema versioning, and association to ensure proper linkage and compatibility between different releases and versions.
• Code Components Distribution: The standard outlines procedures for creating, distributing, and updating code components as ZIP packages containing schema and manifest files. Access to these components is essential for tool integration and software development.
• Parameterization of DataObjects: Improved mechanisms for parameterizing data and service types provide greater flexibility and adaptability in data modeling, including the introduction of new attributes for extensibility.
• Backward Compatibility and Schema Evolution: New compatibility rules ensure that tools can process both new and previous versions of the schema, safeguarding interoperability and future-proofing investments in automation systems.
• Use of UML in Data Modeling: Adoption of Unified Modeling Language (UML) for improved document quality and the clear identification of UML versions and dates in the NSD files.

Applications

IEC TS 61850-7-7:2018/AMD1:2023 is critical for organizations, vendors, and software developers involved in the design, operation, and maintenance of power utility automation systems. The standard is widely applicable in the following contexts:

• System Integration and Interoperability: Ensures that different tools and platforms can seamlessly interpret and manage IEC 61850 data models, facilitating the integration of intelligent electronic devices (IEDs) and automated systems within substations and across smart grid environments.
• Tool Development: Provides a clear, structured XML format for implementing and validating data models, supporting the automation of engineering, configuration, and verification tasks.
• Data Exchange and Digitalization: Enables reliable data exchange between utility stakeholders, promoting digitalization and the move towards standardized, automated solutions.
• Support for Upgrades and Maintenance: The version management and compatibility guidelines help manage schema evolution with minimal disruption, ensuring that software and tools remain up to date with the latest industry requirements.

Related Standards

For a comprehensive approach to power utility automation and IEC 61850 data models, consider the following related standards:

• IEC TS 61850-1-2: Guidelines on extending IEC 61850, outlines procedures for namespace creation and extension.
• IEC TS 61850-2: Glossary of terms used in power utility automation.
• IEC 61850-7-1: Basic communication structure, principles, and models for power utility automation data.
• IEC 61850-7-2 / 7-3 / 7-4: Define the core data model and service modeling rules for communication in power utility automation.
• IEC 61850-6: Specifies the Substation Configuration Language (SCL), closely related to the NSD format.
• IEC 61850-8-1: Details mappings for communication services and is referenced in the context of service type realization within NSD.

This amendment ensures that all stakeholders employing IEC 61850 for power utility automation possess robust, extensible, and interoperable tools to keep their systems current and effective, driving standardization and efficiency in the industry.

Keywords: IEC 61850-7-7, machine-processable format, data model, power utility automation, XML schema, namespace, interoperability, NSD, smart grid, substation automation.

Standards Content (Sample)

IEC TS 61850-7-7 ®
Edition 1.0 2023-01
TECHNICAL
SPECIFICATION
colour
inside
AMENDMENT 1
Communication networks and systems for power utility automation –
Part 7-7: Machine-processable format of IEC 61850-related data models for tools

IEC TS 61850-7-7:2018-03/AMD1:2023-01(en)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: [e-mail].
IEC TS 61850-7-7 ®
Edition 1.0 2023-01
TECHNICAL
SPECIFICATION
colour
inside
AMENDMENT 1
Communication networks and systems for power utility automation –

Part 7-7: Machine-processable format of IEC 61850-related data models for tools

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-6351-8

– 2 – IEC TS 61850-7-7:2018/AMD1:2023
© IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –

Part 7-7: Machine-processable format
of IEC 61850-related data models for tools

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC TS 61850-7-7:2018 has been prepared by IEC technical
committee 57:Power systems management and associated information exchange.
The text of this Amendment is based on the following documents:
Draft Report on voting
57/2471/DTS 57/2523/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.

© IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts in the IEC 61850 series, published under the general title Communication
networks and systems for power utility automation, can be found on the IEC website.
This IEC standard includes Code Components i.e. components that are intended to be directly
processed by a computer. Such content is any text found between the markers BEGINS> and , or otherwise is clearly labeled in this standard as a Code
Component.
The purchase of this IEC standard carries a copyright license for the purchaser to sell software
containing Code Components from this standard directly to end users and to end users via
distributors, subject to IEC software licensing conditions, which can be found at:
http://www.iec.ch/CCv1.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

– 4 – IEC TS 61850-7-7:2018/AMD1:2023
© IEC 2023
INTRODUCTION
Add, at the end of the Introduction, the following new text:
The description of namespace concept and relation between each kind of namespace is defined
by IEC 61850-7-1 and process for creation of a namespace (domain, product, …) is defined by
IEC 61850-1-2.
© IEC 2023
1 Scope
1.1 General
Replace the existing last paragraph of Subclause 1.1 with the following new text:
The purpose of this document is limited to the publication of the XML format which should
support the data model part of any IEC 61850-related standard. The publication of code
components themselves will be part of the related IEC 61850 part, and IEC 61850-1-2 will
indicate the requirements to produce NSD files for other purpose than core datamodel.
1.2 Namespace name and version
Replace the existing title and text of Subclause 1.2 by the following new title and text:
1.2 Published versions
This technical specification defines one namespace:
– A NameSpace Definition (NSD)
Table 1 provides an overview of the references between the published versions of this standard
and the related namespace name.
Table 1 – Reference between published versions of the standard
and related namespace name
Edition Publication date Webstore Namespace
Edition 1.0 2018-03 IEC 61850-7-7:2018 IEC 61850-7-7:2017A
Edition 1.1 2023-01 IEC 61850-7-7:2022 IEC 61850-7-7:2017B5

Add, after Subclause 1.2, the following new Subclause 1.4:
1.4 Namespace name and version
Table 2 shows all the attributes of the XML schema namespace.
Table 2 – Attributes of xsd namespace
Attribute Content
Namespace nameplate
Namespace Identifier (xmlns) http://www.iec.ch/61850/2016/NSD
XSD version header attribute 2017B5
Version 2017
Revision B
Release 5
CodeComponentName NSD
1.3 Code Component distribution
Replace the existing text of Subclause 1.3 by the following new text:

– 6 – IEC TS 61850-7-7:2018/AMD1:2023
© IEC 2023
1.3.1 General
Each Code Component is a ZIP package containing at least the electronic representation of the
Code Component itself and a file describing the content of the package (IECManifest.xml).
The life cycle of a code component is not restricted to the life cycle of the related publication.
The publication life cycle goes through two stages, Version (corresponding to an edition) and
Revision (corresponding to an amendment). A third publication stage (Release) allows
publication of Code Component in case of urgent fixes of InterOp Tissues, thus without need to
publish an amendment.
Consequently, new release(s) of the Code Component may be released, which supersede(s)
the previous release, and will be distributed through the IEC TC 57 web site at:
http://www.iec.ch/tc57/supportingdocuments
The latest version/release of the document will be found by selecting the file for the code
component with the highest value for VersionStateInfo, e.g.
IEC TS 61850-7-7.NSD.{VersionStateInfo}.full.zip.
1.3.2 XML schema namespace code component
The NSD code component namespace is an XML schema file. It will be available in a full version.
The full version is freely accessible on the IEC website for download at:
https://assets.iec.ch/public/tc57/IEC_61850-7-7.2017.NSD.2017B4.full.zip
but the usage remains under the licensing conditions.
In case of any differences between the downloadable code and the IEC pdf published content,
the downloadable code(s) is(are) the valid one; it may be subject to updates. See history files.
2 Normative references
Add the following new reference:
IEC TS 61850-1-2, Communication networks and systems for power utility automation –
Part 1-2: Guidelines on extending IEC 61850
Replace the existing references to IEC TS 61850-2 and IEC 61850-7-1 with the following new
references:
IEC TS 61850-2, Communication networks and systems for power utility automation – Part 2:
Glossary
IEC 61850-7-1:2011, Communication networks and systems for power utility automation –
Part 7-1: Basic communication structure – Principles and models
6.
...

IEC TS 61850-7-7 ®
Edition 1.0 2023-01
TECHNICAL
SPECIFICATION
colour
inside
AMENDMENT 1
Communication networks and systems for power utility automation –
Part 7-7: Machine-processable format of IEC 61850-related data models for tools

IEC TS 61850-7-7:2018-03/AMD1:2023-01(en)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: [e-mail].
IEC TS 61850-7-7 ®
Edition 1.0 2023-01
TECHNICAL
SPECIFICATION
colour
inside
AMENDMENT 1
Communication networks and systems for power utility automation –

Part 7-7: Machine-processable format of IEC 61850-related data models for tools

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-6351-8

COR1:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC TS 61850-7-7
Edition 1  2018-03
Amendment 1
Edition 1  2023-01
COMMUNICATION NETWORKS AND SYSTEMS FOR POWER UTILITY AUTOMATION

Part 7-7: Machine-processable format of IEC 61850-related data models for tools

CO RRI G E NDUM 1
INTRODUCTION TO CORRIGENDUM
a) Background
As part of the maintenance process for the standard, technical issues (called TISSUES) are
collected through the website iec61850.tissue-db.com. A new TISSUE has been entered for
IEC TS 61850-7-7:2018+AMD1:2023 which has to be implemented and published. This
corrigendum notifies the replacement of the code component file
IEC_TS_61850-7-7.2017.NSD.2017B5.full.zip by the following new code component file
IEC_TS_61850-7-7.2017.NSD.2017B6.full.zip.
b) List of interoperability TISSUES to be released
The following tables provides an overview of the various TISSUES applicable to
IEC TS 61850-7-7:2018+AMD1:2023 that will be released with this corrigendum. The table
indicates the number of the TISSUE, the title, and an indication if the code component is
impacted. The indication for the code component is in the column “CC” as follows:
– L: the light version and the full version are impacted
– F: only the full version is impacted; this is typically a change only in the description of
elements
Nr Title CC
1930 New PAS publication process is not supported by NSD L

c) Published versions of the standard and related namespace names
The table below provides a reference between all published editions, amendments or corrigenda
of this document and the full name of the namespace.
Edition Publication date Webstore Namespace
Edition 1.0 2018-03 IEC 61850-7-7:2018 IEC 61850-7-7:2017A
Edition 1.1 2023-01 IEC 61850-7-7:2022 IEC 61850-7-7:2017B5
Edition 1.1/COR1 2024-10 IEC 61850-7-7:2022 IEC 61850-7-7:2017B6

IEC TS 61850-7-7:2018-03/AMD1:2023-01/COR1:2025-05(en)

– 2 – IEC TS 61850-7-7:2018/AMD1:2023/
COR1:2025 © IEC 2025
d) Identification of the code component
The namespace associated with this document is an XML schema (XSD) defining the structure
of NSD files describing IEC 61850 data models namespaces. The parameters which identify
the namespace are provided in the table below:
Attributes of the IEC TS 61850-7-7 XML namespace
Attribute Content
Namespace nameplate
Namespace Identifier (xmlns) http://www.iec.ch/61850/2016/NSD
Version 2017
Revision B
Release 6
XSD version header attribute 2017B6
Recommended reference name eIEC61850-7-7
Code Component Name IEC_61850-7-7.2017.NSD.2017B6.full

Replace the existing code components file IEC_TS_61850-7-7.2017.NSD.2017B5.full.zip by the
following new code components file: IEC_TS_61850-7-7.2017.NSD.2017B6.full.zip.
Table 1 – Reference between published versions
of the standard and related namespace name
Add, at the end of Table 1, the following new row:
Edition 1.1/COR1 2024-10 IEC 61850-7-7:2022 IEC 61850-7-7:2017B6

Table 2 – Attributes of xsd namespace
Replace existing Table 2 with the following new table:
Attribute Content
Namespace nameplate
Namespace Identifier (xmlns) http://www.iec.ch/61850/2016/NSD
Version 2017
Revision B
Release 6
XSD version header attribute 2017B6
Recommended reference name eIEC61850-7-7
Code Component Name IEC_61850-7-.2017.NSD.2017B6.full

COR1:2025 © IEC 2025
1.3.2 XML schema namespace code component
Replace the existing text of the second paragraph of Subclause 1.3.2 with the following new
text:
The full version is freely accessible on the IEC website for download at:
https://assets.iec.ch/public/tc57/IEC_61850-7-7.2017.NSD.2017B6.full.zip
but the usage remains under the licensing conditions.

– 2 – IEC TS 61850-7-7:2018/AMD1:2023
© IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –

Part 7-7: Machine-processable format
of IEC 61850-related data models for tools

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC TS 61850-7-7:2018 has been prepared by IEC technical
committee 57:Power systems management and associated information exchange.
The text of this Amendment is based on the following documents:
Draft Report on voting
57/2471/DTS 57/2523/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.

© IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts in the IEC 61850 series, published under the general title Communication
networks and systems for power utility automation, can be found on the IEC website.
This IEC standard includes Code Components i.e. components that are intended to be directly
processed by a computer. Such content is any text found between the markers BEGINS> and , or otherwise is clearly labeled in this standard as a Code
Component.
The purchase of this IEC standard carries a copyright license for the purchaser to sell software
containing Code Components from this standard directly to end users and to end users via
distributors, subject to IEC software licensing conditions, which can be found at:
http://www.iec.ch/CCv1.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
The content of the corrigendum 1 (2025-05) has been included in this copy.

– 4 – IEC TS 61850-7-7:2018/AMD1:2023
© IEC 2023
INTRODUCTION
Add, at the end of the Introduction, the following new text:
The description of namespace concept and relation between each kind of namespace is defined
by IEC 61850-7-1 and process for creation of a namespace (domain, product, …) is defined by
IEC 61850-1-2.
© IEC 2023
1 Scope
1.1 General
Replace the existing last paragraph of Subclause 1.1 with the following new text:
The purpose of this document is limited to the publication of the XML format which should
support the data model part of any IEC 61850-related standard. The publication of code
components themselves will be part of the related IEC 61850 part, and IEC 61850-1-2 will
indicate the requirements to produce NSD files for other purpose than core datamodel.
1.2 Namespace name and version
Replace the existing title and text of Subclause 1.2 by the following new title and text:
1.2 Published versions
This technical specification defines one namespace:
– A NameSpace Definition (NSD)
Table 1 provides an overview of the references between the published versions of this standard
and the related namespace name.
Table 1 – Reference between published versions of the standard
and related namespace name
Edition Publication date Webstore Namespace
Edition 1.0 2018-03 IEC 61850-7-7:2018 IEC 61850-7-7:2017A
Edition 1.1 2023-01 IEC 61850-7-7:2022 IEC 61850-7-7:2017B5

Add, after Subclause 1.2, the following new Subclause 1.4:
1.4 Namespace name and version
Table 2 shows all the attributes of the XML schema namespace.
Table 2 – Attributes of xsd namespace
Attribute Content
Namespace nameplate
Namespace Identifier (xmlns) http://www.iec.ch/61850/2016/NSD
XSD version header attribute 2017B5
Version 2017
Revision B
Release 5
CodeComponentName NSD
1.3 Code Component distribution
Replace the existing text of Subclause 1.3 by the following new text:

– 6 – IEC TS 61850-7-7:2018/AMD1:2023
© IEC 2023
1.3.1 General
Each Code Component is a ZIP package containing at l
...