SIST EN IEC 62541-19:2026

SLOVENSKI STANDARD
01-maj-2026
Enotna arhitektura OPC - 19. del: Slovarska zveza (IEC 62541-19:2025)
OPC unified architecture - Part 19: Dictionary Reference (IEC 62541-19:2025)
OPC Unified Architecture - Teil 19: Wörterbuch Referenz (IEC 62541-19:2025)
Architecture unifiée OPC - Partie 19: Référence de dictionnaire (IEC 62541-19:2025)
Ta slovenski standard je istoveten z: EN IEC 62541-19:2026
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62541-19

NORME EUROPÉENNE
EUROPÄISCHE NORM January 2026
ICS 25.040
English Version
OPC unified architecture - Part 19: Dictionary Reference
(IEC 62541-19:2025)
Architecture unifiée OPC - Partie 19: Référence de OPC Unified Architecture - Teil 19: Wörterbuch Referenz
dictionnaire (IEC 62541-19:2025)
(IEC 62541-19:2025)
This European Standard was approved by CENELEC on 2026-01-09. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62541-19:2026 E

European foreword
The text of document 65E/1044/CDV, future edition 1 of IEC 62541-19, prepared by SC 65E "Devices
and integration in enterprise systems" of IEC/TC 65 "Industrial-process measurement, control and
automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-01-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-01-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62541-19:2025 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61987 series NOTE Approved as EN IEC 61987 series
IEC 62541-100 NOTE Approved as EN 62541-100
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 62541-1 - OPC Unified Architecture - Part 1: EN IEC 62541-1 -
Overview and concepts
IEC 62541-3 - OPC Unified Architecture - Part 3: Address EN IEC 62541-3 -
Space Model
IEC 62541-5 - OPC Unified Architecture - Part 5: EN IEC 62541-5 -
Information Model
IEC 62541-8 - OPC unified architecture - Part 8: Data EN IEC 62541-8 -
access
ISO/IEC 11179-6 - Information technology - Metadata - -
registries (MDR) – Part 6: Registration
ISO 29002-5 - Information automation systems and - -
integration - Exchange of characteristic
data – Part 5: Identification scheme

Under preparation. Stage at the time of publication: prEN IEC 62541-1:2024.
Under preparation. Stage at the time of publication: prEN IEC 62541-3:2024.
Under preparation. Stage at the time of publication: prEN IEC 62541-8:2024.
IEC 62541-19 ®
Edition 1.0 2025-12
INTERNATIONAL
STANDARD
OPC unified architecture -
Part 19: Dictionary Reference
ICS 25.040  ISBN 978-2-8327-0835-4

IEC 62541-19:2025-12(en)
IEC 62541-19:2025 © IEC 2025
CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Dictionary Reference Information Model overview . 4
4.1 General . 4
4.2 Overview . 5
5 OPC UA ObjectTypes . 6
5.1 DictionaryEntryType . 6
5.2 DictionaryFolderType . 7
5.3 IRDI ISO/IEC 11179-6 conformant DictionaryEntryType . 7
5.4 URI based dictionary entry type . 9
6 HasDictionaryEntry ReferenceType . 9
7 OPC UA VariableTypes . 10
7.1 MultiStateDictionaryEntryDiscreteBaseType VariableType . 10
7.2 MultiStateDictionaryEntryDiscreteType VariableType . 11
8 OPC UA Objects . 11
8.1 Dictionaries Object . 11
9 Examples (informative) . 12
Bibliography . 15

Figure 1 – The dictionary reference types . 6
Figure 2 – IRDI overview . 8
Figure 3 – DeviceType Property example . 12
Figure 4 – Example with references to classes and properties . 13
Figure 5 – Example with two dictionaries . 14

Table 1 – DictionaryEntryType definition . 7
Table 2 – DictionaryFolderType definition . 7
Table 3 – IrdiDictionaryEntryType definition . 8
Table 4 – UriDictionaryEntryType definition . 9
Table 5 – HasDictionaryEntry ReferenceType . 10
Table 6 – MultiStateDictionaryEntryDiscreteBaseType definition . 10
Table 7 – MultiStateDictionaryEntryDiscreteType definition . 11
Table 8 – Dictionaries definition . 11

IEC 62541-19:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPC unified architecture -
Part 19: Dictionary Reference
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes 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, 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 https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 62541-19 has been prepared by subcommittee 65E: Devices and integration in enterprise
systems, of IEC technical committee 65: Industrial-process measurement, control and
automation. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
65E/1044/CDV 65E/1133/RVC
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 International Standard is English.
IEC 62541-19:2025 © IEC 2025
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.
Throughout this document and the other Parts of the series, certain document conventions are
used:
Italics are used to denote a defined term or definition that appears in the "Terms and definitions"
clause in one of the parts of the series.
Italics are also used to denote the name of a service input or output parameter or the name of
a structure or element of a structure that are usually defined in tables.
The italicized terms and names are also often written in camel-case (the practice of writing
compound words or phrases in which the elements are joined without spaces, with each
element's initial letter capitalized within the compound). For example, the defined term is
AddressSpace instead of Address Space. This makes it easier to understand that there is a
single definition for AddressSpace, not separate definitions for Address and Space.
A list of all parts in the IEC 62541 series, published under the general title OPC Unified
Architecture, can be found on the IEC website.
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, or
– revised.
IEC 62541-19:2025 © IEC 2025
1 Scope
This part of IEC 62541, which is a specification, defi
...