TC 3 - Documentation, graphical symbols and representations of technical information

IEC 81355-1:2024 provides rules and guidelines for the classification and designation of information containers based on their inherent content. This document is applicable for information used in the life cycle of a system, e.g., industrial plants, construction entities and equipment.
This document defines classes of information and their information kind classification code (ICC). The defined classes and codes provided are used as values associated with metadata, e.g., in information management systems (see IEC 82045-1 and IEC 82045-2).
The rules, guidelines and classes are general and are applicable to all technical areas, for example, mechanical engineering, electrical engineering, construction engineering and process engineering. They can be used for systems based on different technologies or for systems combining several technologies.
This document also has the status of a horizontal publication in accordance with IEC Guide 108. It is intended for use by technical committees in preparation of publications related to classification and designation of information.
IEC 81355-1:2024 cancels and replaces the second edition of IEC 61355-1 published in 2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to IEC 61355-1:2008:
a) focusing on classification of information rather that classification of document kinds;
b) introduced a classification scheme based on inherent content of information;
c) introduced a distinction between an information container and a document, the latter being for human perception;
d) introduction of information kind classification code (ICC), replacing document kind classification code (DCC);
e) introduced structuring of information containers;
f) introduced an information model of the concepts dealt with;
g) introduced a conversion table for merging from the use of DCC to the use of ICC.

IEC 61360-7:2024 specifies the new data dictionary (domain) "IEC 61360-7 - General items" including its generic concepts. The IEC 61360-7 data dictionary provides concepts (dictionary elements, e.g. classes, properties) intended for cross-domain use.
This document has the status of a horizontal publication in accordance with IEC Guide 108.
The IEC 61360-7 data dictionary is published in IEC CDD and is available at https://cdd.iec.ch.

IEC PAS 63485:2023 addresses creators of information for use of products. Examples of information creators are information architects and technical communicators.
The document defines requirements for electronic request and delivery processes for any kind of information for use. Such processes are needed to bridge the gap between objects in the real world and the information needed by their dedicated users, especially in the context of smart manufacturing, industry 4.0 and the industrial internet of things. This document specifies processes in order to enable n:m relations between information sources and information users when there is no explicit agreement between information provider and information consumer. This document also specifies metadata.

IEC TS 63266:2023 specifies a structure for representation of exchanged information that is essential for testing and maintenance of the devices in power utility automation systems. It is mainly intended to be applied to communication equipment that communicate information in accordance with IEC 61850 (all parts) in at least one part of their communication flow.
The following communication equipment is included within the scope:
– optical instrument transformer;
– conventional instrument transformers related to IEC 61850 traffic;
– merging unit;
– stand-alone merging unit;
– protection, control and measuring devices with at least one IEC 61850 interface;
– switchgear control unit (breaker IED);
– switchgear providing IEC 61850 interface;
– IEC 61850 time synchronization device;
– IEC 61850 gateway (RTU) and station HMI;
– digital disturbance recorder / digital fault recorder;
– digital communication protocol gateways with at least one IEC 61850 interface;
– protection, control and measuring devices that utilise a proprietary protocol for communication with devices that have at least one IEC 61850 interface.
The following communication equipment, scheme and protocols are excluded from the scope:
– IEC 61850 Ethernet switches and network topology;
– PMU phasor measurement unit with at least one IEC 61850 interface;
– the full path of substation-to-substation communication;
EXAMPLE 1: The description of R­GOOSE Publisher in substation A does not include the description of R GOOSE Subscriber in substation B.
– functions with only hardwired communication, e.g. direct analogue copper wired connection;
EXAMPLE 2: A current transformer connected to a protection relay with hardwired tripping of a circuit breaker.
– functions using only proprietary communication protocol systems;
EXAMPLE 3: A dedicated system for collecting disturbance recorder files with courier protocol or path from IEC 60870­5­103 to IEC 60870-5-101 will not be presented in this document.
– protocol mappings to XMPP (IEC 61850-8-2).
This document forms a supplement to other documentation standards in power utility automation.
It also harmonizes the representation of the logical data flow structures based on IEC 61850 communication among different devices in order to provide a reference document that can be created for any IEC 61850 substation.
This document focuses in principle on the visualization of the digital information exchanged between IEDs and control or measurement devices in a power utility automation system. The information visualization does not refer to any graphical modelling but to a tabular format of presentation. The data in tabular format can be used as a basis for other kinds of visual presentation outside the scope of this document.
For representing all kinds of substation information, a single suitable tabular form is not possible to find. This document instead presents a limited number of high visual performance representation formats.
Presentation formats described in this document provide interactive visualization that assists users in analysing data and identifying some important and essential information in a more efficient way.

IEC TR 63358-1:2023 contains, by way of example, a collection of generic symbols, general symbols and qualifying symbols for diagrams taken from IEC 60617. Some of the wording of entries in the IEC 60617 database are annotated and/or modified for the purpose of clarification. Existing symbols in the IEC 60617 database are classified according to the classification proposed in this document.

IEC 62648:2022 document provides guidelines to help ensure that the requirement in ISO/IEC Directives, Part 2:2021, 28.6.2 is met, such that graphical symbols for use on equipment in IEC product publications are consistent with the requirements of horizontal publications IEC 60417, and ISO 7000. This document is intended to be used by any IEC and ISO committees to develop graphical symbols for use on equipment for inclusion in their product publications. This document is based on and develops upon IEC Guide 108:2019, Clause 8. For the creation of new graphical symbols for use on equipment, IEC 80416-1 and ISO 80416 2 are applied. For the application of standardized graphical symbols for use on equipment, IEC 80416-3 and ISO 80416-4 are applied. This horizontal publication is primarily intended for use by committees in the preparation of publications in accordance with the principles laid down in IEC Guide 108. One of the responsibilities of a committee is, wherever applicable, to make use of horizontal publications in the preparation of its publications. The contents of this horizontal publication will not apply unless specifically referred to or included in the relevant publications. IEC 62648:2022 cancels and replaces the first edition published in 2012 and Amendment 1:2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) new terms and definitions in IEC Guide 108 have been incorporated;
b) the designation "IEC 60417 SDB" has been introduced following the publication of IEC Supplement:2022, Annex SK;
c) Subclause 6.3 has been adapted in line with IEC Guide 108:2019, Clause 8.

ISO 81346-10:2022 This document provides rules for structuring of systems in the domain of power supply systems, being supplementary to the general principles for the structuring of systems including structuring of information about systems specified in IEC 81346-1.
Based on these principles, rules and guidance are given for the formulation of unambiguous reference designations for objects in any system.
The reference designation identifies objects for the purpose of creation and retrieval of information about an object and, where realized, about its corresponding component.
A reference designation labelled at a component is the key to finding information about that object among different kinds of documents.
The principles are general and are applicable to all technical areas (e.g. mechanical engineering, electrical engineering, construction engineering, process engineering). They can be used for systems based on different technologies or for systems combining several technologies.
This document also defines classes for systems and spaces in the field of power supply systems.

IEC 81346-1:2022 establishes general principles for the structuring of systems including structuring of information about systems.
Based on these principles, rules and guidance are given for the formulation of unambiguous reference designations for objects in any system.
The reference designation identifies objects for the purpose of creation and retrieval of information about an object and, where realized, about its corresponding component.
A reference designation labelled at a component is the key to finding information about that object among different kinds of documents.
The principles are general and are applicable to all technical areas (for example mechanical engineering, electrical engineering, construction engineering, process engineering). They can be used for systems based on different technologies or for systems combining several technologies.
This document is also a horizontal publication intended for use by technical committees in preparation of publications related to reference designations in accordance with the principles laid down in IEC Guide 108.
IEC 81346-1:2022 cancels and replaces the first edition published in 2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the scope includes a reference to IEC Guide 108 for being a horizontal publication;
b) synchronization with IEC 81346-2:2019 and ISO 81346-12:2018;
c) the introduction of the type aspect;
d) introduction of an information model of the reference designation system;
e) introduction of an information model for the framework of reference designation system to comply with International Standard 81346 series;
f) introduction of recommendation for metadata for design structure management;
g) introduction of rules and method for designation of relations between objects;
h) introduction of requirements for development of sector-specific parts of the International Standard 81346 series;
i) introduction of requirements for incorporation of sub-object in object structures;
j) introduction of recommendations for documentation of the application of the International Standard 81346 series;
k) introduced definition of new terms used;
l) new rules added and existing rules modified;
m) notes related to rules are converted to normative text as "Comment to Rule nn".

IEC 60445:2021 applies to the identification and marking of terminals of electrical equipment such as resistors, fuses, relays, contactors, transformers, rotating machines and, wherever applicable, to combinations of such equipment (e.g. assemblies), and also applies to the identification of terminations of certain designated conductors. It also provides general rules for the use of certain colours or alphanumeric notations to identify conductors with the aim of avoiding ambiguity and ensuring safe operation. These conductor colours or alphanumeric notations are intended to be applied in cables or cores, busbars, electrical equipment and installations. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It has the status of a basic safety publication in accordance with IEC Guide 104.
IEC 60445:2021 cancels and replaces the sixth edition published in 2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the definitions have been aligned with IEC 60050-195:2021 and IEC 60050-826;
b) the provisions for colour to be used for identification of certain designated conductors are made requirements and not only recommendations;
c) introduction of a new subclause on marking of protective terminals for multiple power supply inputs on equipment.

IEC 60152:2021 specifies methods and rules for the designation of phase difference between two items in a three-phase AC system. The designations are intended to be applied in the technical documentation of industrial installations, equipment, and products, and also on markings of equipment and products.
IEC 60152:2021 cancels and replaces the first edition published in 1963. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the title has been updated to reflect the content of the document;
b) the concept of identifying conductors with hour number has been removed as the concept is considered out of date and other means for identifying conductors exists;
c) definition of hour number (clock number) and phase difference introduced.

IEC 60757:2021 specifies letter codes for designation of colours and provides rules for their combination to designate colour combinations. The letter codes are intended to be applied in the technical documentation of electrical installations, electrical equipment and products, and in markings of electrical equipment and products.
This basic safety publication focusing on safety essential requirements is primarily intended for use by technical committees in the preparation of safety publications in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.
It is not intended for use by manufacturers or certification bodies. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements of this basic safety publication will not apply unless specifically referred to or included in the relevant publications.
This document does not specify any requirements for the encoding of colour properties, nor for their visual representation. Such requirements are under the responsibility of the different technical committees.
IEC 60757:2021 cancels and replaces the first edition published in 1983. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) codes restricted to letter codes;
b) removed old unnecessary notes;
c) added a new subclause on alternating colours of the same item;
d) added Annex A with examples of colours and their corresponding RGB (red, green, blue) encoding.

IEC 61666:2010 establishes general principles for the identification of terminals of objects within a system, applicable to all technical areas (for example mechanical engineering, electrical engineering, construction engineering, process engineering). They can be used for systems based on different technologies or for systems combining several technologies. This second edition cancels and replaces the first edition of IEC 61666 published in 1997 and edition constitutes a technical revision. It includes the following substantial changes with respect to the previous edition:
- the terminology used in the publication has been adapted to the one used in IEC 81346-1 Ed. 2;
- a more comprehensive description of the designation principles is provided;
- additional examples illustrating terminal designations related to the function aspect and location aspect are provided;
- an additional example illustrating the use of terminal designation sets is provided;
- the former informative Annex A has been turned into a clause in the standard.
IEC 61666:2010 has the status of a horizontal standard in accordance with IEC Guide 108

IEC 62656-8:2020 specifies a web service interface to exchange data parcel(s) conformant to IEC 62656-1, between a parcel server and a parcel client or between parcel servers. This interface comprises three basic services: a registration service, resolution service and subscription service.
This document includes the following:
– holistic use scenario;
– detailed specification of the three basic services;
– JSON and XML notation schemas for data parcel(s).
The following items are outside the scope of this document:
– user identification and authorization;
– query language for a data parcel;
– transportation protocol;
– data and communication security techniques.

IEC 61293:2019 establishes minimum requirements and general rules on marking electric equipment with ratings and other characteristics to enable the proper and safe selection and installation of electric equipment related to any supply of electricity.
The object of this document is to:
• provide general requirements for the marking of the characteristics related to any supply system, such as voltage, current, frequency and power, without any restrictions;
• provide technical committees with uniform methods for the marking of electrical ratings of products.
This document is primarily intended for application by technical committees when specifying minimum markings of ratings related to any electrical supply of equipment, sub-assemblies and components, but it is also for application by product manufacturers for marking their products.
This horizontal standard is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 108.
One of the responsibilities of a technical committee is, wherever applicable, to make use of horizontal standards in the preparation of its publications. The contents of this horizontal standard will not apply unless specifically referred to or included in the relevant publications.
IEC 61293:2019 cancels and replaces the first edition published in 1994. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) its status as a basic safety publication has been removed;
b) the scope is extended to include the applicability of this document to product manufacturers;
c) the addition of a provision that the visibility of the marking during normal operation should be considered;
d) more detailed requirements where equipment has a set or range of rated values for a given characteristic;
e) requirements regarding the provision of the markings also in the technical documentation have been added;
f) some notes have been converted to normative text;
g) normative references and references to other standards have been updated.
It has the status of a horizontal standard in accordance with IEC Guide 108.

IEC 81346-2:2019 establishes classification schemes with defined object classes and their associated letter codes, and is primarily intended for use in reference designations and for designation of generic types.
The classification schemes are applicable for objects in all technical disciplines and all branches of industry.
IEC 81346-2:2019 has the status of a horizontal standard in accordance with IEC Guide 108. It is also intended for use by technical committees in preparation of publications related to reference designations in accordance with the principles laid down in IEC Guide 108.
IEC 81346-2:2019 cancels and replaces the first edition published in 2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) The entry classes of the classification scheme have been defined to reflect the “inherent function” of the object classified;
b) The classes are defined to align with the principles of ISO 22274 and ISO 704;
c) A three-level classification scheme has been defined, which provides a greater flexibility for the designer in some technical fields;
d) Classes are defined by their definition and provided with a preferred term. Examples are provided if needed;
e) A separate classification scheme for spaces has been provided.

IEC/IEEE 82079-1:2019 is jointly developed and published by IEC, IEEE, and ISO and provides general principles and detailed requirements for the design and formulation of all types of instructions for use that will be necessary or helpful for users of products of all kinds, ranging from a tin of paint to large or highly complex products, such as large industrial machinery, turnkey based plants or buildings.
IEC/IEEE 82079-1:2019 cancels and replaces the first edition IEC 82079-1:2012. This edition constitutes a technical revision. It includes the following significant technical changes with respect to the previous edition:
a) The structure of this document has been rearranged in order to facilitate application of the standard and to make it easier to find information. Where possible, the language has been simplified.
b) Information for use is introduced as a generic term. Instructions for use is a synonym for information for use. Step-by-step instructions is used as a subset of information for use.
c) Clause 5 (principles) is revised and focuses on the purpose of information for use, the quality of information and the process for management of information.
d) The process for preparation of information for use is integrated in the normative part and addressed comprehensively.
e) Empirical methods for the evaluation of information for use are described in the normative part.
f) The professional competencies needed for the preparation of information for use are addressed more comprehensively.
g) Some aspects have been added to general requirements for information for use for complex systems of systems.
h) Consideration is given to instructions for self-assembly products.
i) An informative annex providing guidance on the fulfilment of specified requirements is introduced.
IEC/IEEE 82079-1:2019 has the status of a horizontal standard in accordance with IEC Guide 108. It is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 108.
One of the responsibilities of a technical committee is, wherever applicable, to make use of horizontal standards in the preparation of its publications. The contents of this horizontal standard will not apply unless specifically referred to or included in the relevant publications.

ISO 81346-12:2018 This document establishes rules for structuring of systems and the formulation of reference designations and provides classes for systems in the field of construction works and building services. This document also specifies a classification of objects and corresponding letter codes for use in reference designations of object occurences.
This document is not intended for manufacturers or system-related designations of individuals (e.g. inventory number or serial number) or for product types (e.g. article number or parts number).

IEC TS 63064:2018(E) This document gives guidance and basic principles on how to design graphical symbols for diagrams for standardization and inclusion in IEC 60617.
This document does not specify how to apply such graphical symbols in the diagrams.

IEC 60445:2017 applies to the identification and marking of terminals of electrical equipment such as resistors, fuses, relays, contactors, transformers, rotating machines and, wherever applicable, to combinations of such equipment (e.g. assemblies), and also applies to the identification of terminations of certain designated conductors. It also provides general rules for the use of certain colours or alphanumeric notations to identify conductors with the aim of avoiding ambiguity and ensuring safe operation. These conductor colours or alphanumeric notations are intended to be applied in cables or cores, busbars, electrical equipment and installations. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.
It has the status of a basic safety publication in accordance with IEC Guide 104. This sixth edition cancels and replaces the fifth edition of IEC 60445, published in 2010. This edition includes the following significant technical changes with respect to the previous edition:
a) the text of the introduction has been moved into the scope in accordance with IEC Guide 104;
b) colour codes for the identification of line conductors of DC systems;
c) colour code for the identification of functional earthing conductor;
d) update of Table A.1with colour codes for DC line conductors;
e) conversion of notes containing non-mandatory requirements to normative text;
f) the terminology is aligned with IEC 60050-195.
The contents of the corrigendum of November 2017 have been included in this copy.

IEC 61360-1:2017 specifies principles for the definition of the properties and associated attributes and explains the methods for representing verbally defined concepts with appropriate data constructs available from IEC 61360-2. It also specifies principles for establishing a hierarchy of classification from a collection of classes, each of which represents a technical concept in the electrotechnical domain or a domain related to electrotechnology. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- support of advanced constructs such as
· conditions and constraints,
· blocks,
· cardinality,
· polymorphism,
· generic and restricted enumerations, and
· mapping;
- extended list of data types;
- harmonization with IEC 62656-1;
- support of IEC TS 62720 and of coded units;
- harmonization of semantic and administrative data among the various information objects;
- use of UML for data modelling;
- enhanced definitions and descriptions;
- introduction of examples of higher level constructs such as block, cardinality, or polymorphism as guidance for the user of the IEC 61360 series.
IEC 61360-4, IEC reference collection of standard data element types and component classes, can be accessed from IEC CDD (Common Data Dictionary) Free access to Database. The database contains the IEC reference collection of classes and associated characteristic properties (data element types or DETs) of electric/electronic components including materials, geometry and features used in electrotechnical equipment and systems. The dictionary and database follow the methodology of Part 1 of IEC 61360 and the information model of Part 2.
IEC 61360-1:2017 has the status of a horizontal standard in accordance with IEC Guide 108.

IEC 62569-1:2017 specifies several qualifiers to be used with object or (dictionary) properties and their values indicating life cycle and other aspects of the property. It is a prerequisite for the usage of the other parts of IEC 62569. This first edition cancels and replaces IEC PAS 62569-1:2009. This edition constitutes a technical revision.

IEC 62656-5:2017 specifies a method for representing activities and relations among the activities by a tabular ontology representation, called “parcellized activity model” or PAM for short, which is a specialized use of a generic tabular ontology data model, known as the parcellized ontology model (POM) defined in Part 1 of the IEC 62656 series. The activities that can be described by this document include part or whole of an enterprise, an organization or a collection of services, a set of events or processes which interact with each other by exchanging physical or non-physical entities. This part of IEC 62656 also defines a method for uniquely identifying activities, or their homologues happenings in a certain sequence. In addition, this document identifies flows of information, objects or materials exchanged among activities, where each of the activities is represented by a class and each flow by a relation.

IEC TS 62720:2017(E) specifies identifiers for units to support computer-based processing of product data. It provides a survey of quantities with associated collections of internationally standardized as well as non–standardized units used in business and science.
It covers any standard or non-standard units of measure currently in use, in two or more distinct ethno-linguistic groups or nations, at least in one domain of industry, for which an explicit method of conversion to a known standard unit of measure or its equivalent is well documented or evident from external references.

IEC 61360-6:2016 provides guidance for the definition of concepts that are used to describe classes and properties submitted for update of the content of IEC Common Data Dictionary (IEC CDD). This includes:
- a basic understanding of key concepts and procedures used within IEC CDD;
- a binding reference for quality control of IEC 61360 compliant dictionary content;
- guidance on documents where necessary in-depth knowledge can be acquired.
IEC 61360-4, IEC reference collection of standard data element types and component classes, can be accessed from IEC CDD (Common Data Dictionary) Free access to Database. The database contains the IEC reference collection of classes and associated characteristic properties (data element types or DETs) of electric/electronic components including materials, geometry and features used in electrotechnical equipment and systems. The dictionary and database follow the methodology of Part 1 of IEC 61360 and the information model of Part 2.

IEC TS 62666:2016(E) provides guidelines to ensure consistency with respect to the specification of requirements for information, documentation and graphical symbols in IEC publications provided by system or product committees. This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:
- the references to relevant standards have been updated and horizontal standards have been designated;
- a new subclause "Identification of equipment, basic and safety principles" has been added. The reason for this is that a group of standards have been placed under the responsibility of TC 3.

IEC TR 62687:2015(E) contains a collection of terms (glossary) used in IEC, ISO and ITU publications in the field of graphical symbols for use on equipment including some related fields. Some terms are annotated and/or modified for the purpose of clarification. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision and includes the following significant technical changes with respect to the previous edition:
- The title has changed from "terminology" to "vocabulary";
- Annex A has been added.

IEC 61175-1:2015 provides rules for the composition of designations for the identification of signals and signal connections. This includes the designation of power supply. This part of IEC 61175 is applicable to all types of signals within an industrial system, installation and equipment and industrial products. It deals with the information aspect of signals and not with their physical implementation. This first edition cancels and replaces the second edition of IEC 61175 published in 2005 and constitutes a technical revision. It includes the following changes: an improved description of the principles for use and a strict separation between the physical aspect of a signal and its associated information, focusing on the latter.
It has the status of a horizontal standard in accordance with IEC Guide 108.

IEC TR 62964:2015(E) provides the result of a study of some of the graphical symbols for use on equipment standardized in IEC 60417 being primarily intended to:
- identify the equipment or a part of the equipment (e.g. a control or display);
- indicate a functional state (e.g. on, off, alarm);
- designate connections (e.g. terminals, filling points for materials);
- provide information on packaging (e.g. identification of contents, instructions for handling);
- provide instruction for the operation of the equipment (e.g. limitations of use);
- in the focus of contemporary use of graphical symbols for use on multimedia equipment, and new possible meanings to be envisaged as well as new graphical symbols not yet standardized in IEC 60417.

IEC 62656-3:2015 defines a formal mapping between the IEC 62656 and meta-model for CIM in order to import the CIM ontology into the IEC CDD, and to ensure the interoperability of ontologies of two standards, or even among a wider spectrum of standards. For the basis of the mapping from CIM to the data model defined in IEC 62656-1, the UML representation of CIM is referenced.

IEC 62744:2014 provides generic rules for the representation of states of objects by graphical symbols standardized in IEC 60617, ISO 14617, IEC 60417, for example, and for future graphical symbols included in these standards. It also provides operational states of an object as examples that typically occur and which need to be represented by standardized graphical symbols and defines generic rules to be applied. It specifies which types of presentation facilities are recommended to present the different operational states to humans.
It has the status of a horizontal standard in accordance with IEC Guide 108.

IEC 61082-1:2014 establishes general rules and guidelines for the presentation of information in documents, and specific rules for diagrams, drawings and tables used in electrotechnology. This third edition cancels and replaces the second edition published in 2006. It constitutes a technical revision and includes the following changes:
- inclusion of presentation rules for wireless interconnections;
- description of exceptional cases for the application of rules for positioning of reference designations in diagrams;
- correction of errors and update of the normative references;
- harmonization of definitions with respect to referenced publications.
It has the status of a horizontal standard in accordance with IEC Guide 108.

IEC 62656-1:2014 specifies the logical structure for a set of spreadsheets, used as "data parcels", to define, transfer and register product ontologies. The spreadsheet interface structure defined in this part of IEC 62656 contains the following:
- Definition and specification of the logical structure and layout of the spreadsheet interface for definition, transfer, and registering of a reference dictionary;
- Definition and specification of library instance data belonging to a class of a reference dictionary described by a set of spreadsheets conformant to this part of IEC 62656;
- Definition and specification of the meta dictionary that enables the definition and transfer of a reference dictionary as a set of instance data conforming to the meta dictionary;
- Definition and specification of the meta-model as data that enables the definition and transfer of a reference dictionary as a set of instance data conforming to the meta-meta-dictionary;
- Specification of the mapping between the dictionary data expressed in the spreadsheet format and the EXPRESS model specified by IEC 61360-2/ISO 13584-42 (with some elements of ISO 13584-25);
- Description of the basic semantic mapping between the dictionary data expressed in the spreadsheet formats defined in this part of IEC 62656 and that of DIN 4002.

IEC 62656-2:2013 provides an application guide for the data parcels specified in IEC 62656-1 and used for the definition of a domain data dictionary that may be imported from and exported to the IEC common data dictionary, or IEC CDD for short, maintained as the IEC 61360-4 database. It provides instructions for the interpretation and use of the technical specification defined in IEC 62656-1 within a software application, to avoid misuse of the data constructs available in IEC 62656-1.

IEC/TS 62720:2013 specifies identifiers for units to support computer-based processing of product data. It provides a survey of quantities with associated collections of internationally standardized as well as non-standardized units used in business and science. It concerns any standard or non-standard units of measure currently in use, in two or more distinct ethno-linguistic groups or nations, at least in one domain of industry, for which an explicit method of conversion to a known standard unit of measure or its equivalent is well documented or evident from external references.

IEC 60848:2013 defines the GRAFCET specification language for the functional description of the behaviour of the sequential part of a control system. It specifies the symbols and rules for the graphical representation of this language, as well as for its interpretation and has been prepared for automated production systems of industrial applications. This third edition cancels and replaces the second edition published in 2002 and constitutes a global technical revision with the extended definition of the concept of variables introducing: internal variable, input variable and output variable.

L'IEC 61360-2:2012 fournit un modèle formel pour les données conformément au domaine d'application donné dans l'IEC 61360-1 et l'ISO 13584-42. Elle fournit un moyen pour la représentation et l'échange des données interprétables par un ordinateur, permettant ainsi la mise en oeuvre de dictionnaires de systèmes traitant des données livrées conformément à l'une ou l'autre des normes. Cette troisième édition annule et remplace la deuxième édition parue en 2002 et son Amendement 1 (2003). Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes:
- séparation des concepts entre la classe de categorisation et la classe de caractérisation;
- introduction de contraintes de valeurs pour les classes et les propriétés;
- ajout de nouveaux sous-types différents pour les types de données, y compris l'entité rational_type;
- amélioration de la représentation de l'unité de mesure.
L'IEC 61360-2:2012 a le statut de norme horizontale conformément au Guide IEC 108.

IEC/TS 62771:2012(E) contains a formal reference information model of the concepts and methods established in IEC 81346-1, IEC 81346-2, IEC 61175, IEC 61666 and IEC 81714-3, which are its normative basis.

IEC/TS 62768:2012(E) specifies how product committees, including committees producing horizontal standards, intending to submit Data Element Types (DETs) for inclusion in the IEC Component Data Dictionary (IEC CDD), should specify the source descriptions in their own standard; and specify the information to be sent to SC3D for inclusion in IEC CDD.

IEC 62648:2012 provides guidelines to ensure that graphical symbols for use on equipment in IEC product publications are consistent with the requirements of horizontal standard IEC 60417, and ISO 7000. This document is intended to be used by any technical committees and subcommittees to develop graphical symbols for use on equipment for inclusion in their product publications. It has the status of a horizontal standard in accordance with IEC Guide 108.

IEC 62023:2011 provides rules for applying a method of structuring technical information and documentation by using a main document (leading document) for the clustering of the information for each object. This second edition cancels and replaces the first edition of IEC 62023 published in 2000. This edition constitutes a technical revision. It includes the following substantial changes with respect to the previous edition:
- the terminology used in the publication has been adapted to the one used in IEC 81346-1:2009 and IEC 62507-1:2010;
- the figures have been adapted to the principles used in IEC 81346-1:2009 in order to better illustrate the interrelations between the standards;
- the examples in the annexes have been provided with comments.
IEC 62023:2011 has the status of a horizontal standard in accordance with IEC Guide 108.
The contents of the corrigendum of February 2012 have been included in this copy.

IEC 80416-3:2002+A1:2011 provides guidelines for the application of graphical symbols for use on equipment in order to maintain visual clarity and overall consistency when such graphical symbols are applied. It stipulates the permissible extent by which a symbol original may be modified in reproduction for actual use on equipment. It bears the edition number 1.1. The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. A vertical line in the margin shows where the base publication has been modified by amendment 1. Additions and deletions are displayed in red, with deletions being struck through. This consolidated version consists of the first edition (2002) and its amendment 1 (2011). Therefore, no need to order amendment in addition to this publication.

Provides guidelines for the application of graphical symbols for use on equipment in order to maintain visual clarity and overall consistency when such graphical symbols are applied. It stipulates the permissible extent by which a symbol original may be modified in reproduction for actual use on equipment

IEC 62027:2011 provides rules and guidelines for the presentation of information in object lists, and specific rules for such documents. It is applicable to object lists such as parts lists, function lists and location lists used in the design and engineering process intended to be supplied with the documentation. This edition includes the following substantial changes with respect to the previous edition:
- the terminology used in the publication has been adapted to the one used in IEC 81346-1:2009, IEC 62507-1:2010 and IEC PAS 62569-1:2009;
- the term "object list" has been introduced as the generic term, and "parts list" used as a specific term for object lists associated with the product structure;
- Annex A of the previous edition has been taken away and partly replaced by 6.2 and a reference to IEC 61355 DB;
- a new Annex A providing guidance on the presentation of subsets of characteristic properties has been introduced;
- a new Annex B providing source definitions and references to used data element types has been introduced;
- the examples in the annexes C, D and E (corresponding to B, C and D in the previous edition) have been provided with comments.
IEC 62027:2011 has the status of a horizontal standard in accordance with IEC Guide 108.

IEC/TR 62711:2011(E) provides recommendations for consistent use of mnemonics and qualifying symbols to be applied to symbols representing devices used in systems for monitoring, protection, switching, and controlling of apparatus in electrical substations, generating stations, power utilization and conversion facilities, and equipment designed for automatic protection of power systems. The recommendations are intended for designers, manufacturers and engineers of such systems.