SIST EN 61355-1:2008

SLOVENSKI STANDARD
01-september-2008
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SIST EN 61355:1997
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Classification and designation of documents for plants, systems and equipment -- Part 1:
Rules and classification tables
Klassifikation und Kennzeichnung von Dokumenten für Anlagen, Systeme und
Ausrüstungen - Teil 1: Regeln und Tabellen zur Klassifikation
Classification et désignation des documents pour installations industrielles, systèmes et
matériels -- Partie 1: Règles et tableaux de classification
Ta slovenski standard je istoveten z: EN 61355-1:2008
ICS:
01.110 7HKQLþQDGRNXPHQWDFLMD]D Technical product
L]GHONH documentation
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61355-1
NORME EUROPÉENNE
June 2008
EUROPÄISCHE NORM
ICS 01.080.01; 01.080.30 Supersedes EN 61355:1997

English version
Classification and designation of documents for plants,
systems and equipment -
Part 1: Rules and classification tables
(IEC 61355-1:2008)
Classification et désignation  Klassifikation und Kennzeichnung
des documents pour installations von Dokumenten für Anlagen,
industrielles, systèmes et matériels - Systeme und Ausrüstungen -
Partie 1: Règles et tableaux Teil 1: Regeln und Tabellen
de classification zur Klassifikation
(CEI 61355-1:2008) (IEC 61355-1:2008)

This European Standard was approved by CENELEC on 2008-05-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61355-1:2008 E
Foreword
The text of document 3/878/FDIS, future edition 2 of IEC 61355-1, prepared by IEC TC 3, Information
structures, documentation and graphical symbols, in co-operation with ISO TC 10, Technical product
documentation, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61355-1 on 2008-05-01.
This EN 61355-1:2008, together with the IEC 61355 database, replaces EN 61355:1997.
The main changes with respect to EN 61355:1997 are listed below:
– Table A.2 has been extended under code P;
– Table B.1 in EN 61355:1997 is replaced by a separate standard in database format: IEC 61355 DB.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61355-1:2008 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 standards indicated:
IEC 81346-1 NOTE  Intended for harmonization as EN 81346-1 (not modified).
IEC 82045-1 NOTE  Harmonized as EN 82045-1:2001 (not modified).
IEC 82045-2 NOTE  Harmonized as EN 82045-2:2005 (not modified).
__________
- 3 - EN 61355-1:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 61082-1 2006 Preparation of documents used in EN 61082-1 2006
electrotechnology -
Part 1: Rules
IEC 62023 2000 Structuring of technical information and EN 62023 2000
documentation
ISO 639-1 2002 Codes for the representation of names of - -
languages -
Part 1: Alpha-2 code
ISO 3166-1 2006 Codes for the representation of names of EN ISO 3166-1 2006
countries and their subdivisions -
Part 1: Country codes
ISO 7200 2004 Technical product documentation - Data EN ISO 7200 2004
fields in title blocks and document headers

IEC 61355-1
Edition 2.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification and designation of documents for plants, systems and
equipment –
Part 1: Rules and classification tables

Classification et désignation des documents pour installations industrielles,
systèmes et matériels –
Partie 1: Règles et tableaux de classification

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 01.080.01; 01.080.30 ISBN 2-8318-9622-3

– 2 – 61355-1 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.8
2 Normative references .8
3 Terms and definitions .8
4 Basic concepts on documents and documentation .10
4.1 General .10
4.2 Document kinds.11
4.3 Documents .11
4.4 Composite documents .11
4.5 Document sets .12
4.6 Documentation .12
5 Classification of documents .12
5.1 Classification principles.12
5.2 Assigning documents to classes.13
5.3 Assigning composite documents to classes .13
5.4 Layout of document kind classification code (DCC) .13
6 Document designation .15
6.1 Document and document page designation .15
6.2 Document designation for identification purposes.17
7 Documentation .17
8 Naming of document kinds and communication principles.19
8.1 Naming conventions of document kinds and documents .19
8.2 Communication about document interchange .20

Annex A (normative) Code letters .21
Annex B (informative) Additional information about document kinds for communication
purposes.37
Annex C (informative) Communication about document interchange .39

Bibliography.42

Figure 1 – Interrelation of documentation-related terms .11
Figure 2 – Classification structure of documents .12
Figure 3 – Structure of document kind classification code .13
Figure 4 – Example of a document with changed technical area classification.14
Figure 5 – Principle of document designation.15
Figure 6 – Application of page counting number for page grouping .16
Figure 7 – Examples of structures of a system and of the object-related structure of the
documentation .19
Figure C.1 – Document interchange list, general part.40
Figure C.2 – Document interchange list, object-related part .40
Figure C.3 – Document interchange list, filled-in example .41

61355-1 © IEC:2008 – 3 –
Table A.1 – Code letters for technical areas.21
Table A.2 – DCC and descriptions of document kind classes .22
Table B.1 – Letter code for basic document kinds and forms of presentation .37

– 4 – 61355-1 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CLASSIFICATION AND DESIGNATION OF DOCUMENTS
FOR PLANTS, SYSTEMS AND EQUIPMENT –

Part 1: Rules and classification tables

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61355-1 has been prepared by IEC technical committee 3:
Information structures, documentation and graphical symbols in co-operation with
ISO technical committee 10: Technical product documentation.
This second edition cancels and replaces the first edition published in 1997. This edition
constitutes a technical revision.
The main changes with respect to the previous edition are listed below:
• Table A.2 has been extended under code P;
• Table B.1 in the first edition has been omitted from this second edition; it is being replaced
by a separate standard in database format: IEC 61355 DB.

61355-1 © IEC:2008 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
3/878/FDIS 3/890/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 61355 series, published under the general title Classification and
designation of documents for plants, systems and equipment, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 61355-1 © IEC:2008
INTRODUCTION
Documentation is necessary for the provision of information for all activities during the life-
cycle of technical products which include plants, systems and equipment. It may be produced
in any phase or activity. Documents may be received from and delivered to other parties.
Different parties may need different information or different views on the same information,
depending on what is most suitable for the intended purpose.
In this part of IEC 61355 the term "document" is used in a very general sense. It covers
information on all possible media on which data can be recorded. However, the description of
document kinds is derived from the paper-based presentation of this information, i.e. how the
information is made visible and readable for the user.
One aim of this standard is to establish a method for better communication and understanding
between parties involved in document interchange. In order to get a basis for a system, it is
necessary to disregard, more or less, what a document is called today. Different names are in
use for the same document kind or the names may have different meanings for different
parties. The purpose and object of interest are sometimes also part of document titles, which
hampers general understanding. Therefore, the basis for a common understanding should be
a document kind classification which is based only on the content of information.
Another aim is to cover the need for data retrieval as it is often based on the need for the
information content of the document.
A third aim of this standard is to set up rules for a specific method of correlating documents
and objects, i.e. to indicate to which object a specific document belongs. For this purpose, a
document designation system is provided, linking the document kind designation to the object
designation used within the plant, system or equipment. Following the rules and
recommendations given, the documentation reflects the structure of the "real installation". By
that also guidance is given for sorting and grouping as well as for structured searching for
information, for example in document retrieval systems.

61355-1 © IEC:2008 – 7 –
(Blank)
– 8 – 61355-1 © IEC:2008
CLASSIFICATION AND DESIGNATION OF DOCUMENTS
FOR PLANTS, SYSTEMS AND EQUIPMENT –

Part 1: Rules and classification tables

1 Scope
This part of IEC 61355 provides rules and guidelines for the classification of documents based
on their characteristic content of information. A letter-code indicating the document kind class
is provided together with rules and guidelines for its application in a document designation
code. This standard is relevant for documents in all technical areas which are in use during
the life cycle of a plant, system or equipment.
NOTE The defined classes and codes are intended to be used as values associated with metadata in document
management systems (see IEC 82045-1 and IEC 82045-2).
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 61082-1:2006, Preparation of documents used in electrotechnology – Part 1: Rules
IEC 62023:2000, Structuring of technical information and documentation
ISO 639-1:2002, Code for the representation of names of languages – Part 1: Alpha-2 code
ISO 3166-1:2006, Codes for the representation of names of countries and their subdivisions –
Part 1: Country codes
ISO 7200:2004, Technical product documentation – Data fields in title blocks and document
headers
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
data medium
material in or on which data can be recorded and from which data can be retrieved
[ISO/IEC 2382-1, definition 01.01.51]
3.2
document
fixed and structured amount of information intended for human perception that can be
managed and interchanged as a unit between users and systems
NOTE 1 The term document is not restricted to its meaning in a legal sense.
NOTE 2 A document can be designated in accordance with the type of information and the form of presentation,
for example overview diagram, connection table, function chart.

61355-1 © IEC:2008 – 9 –
[IEC 61082-1, definition 3.1.2]
3.3
composite document
document containing different parts of information, each part related to a different document
kind class
3.4
document set
collection of different documents which is intended to be treated as a unit
NOTE Document sets may consist of documents and composite documents.
3.5
documentation
collection of documents related to a given subject
[IEC 61082-1, definition 3.1.4]
NOTE 1 This may include technical, commercial and/or other documents.
NOTE 2 The term may refer to objects in the sense of IEC 81346* (61346) or to other things to be addressed.
* to be published
NOTE 3 A documentation can consist of documents, composite documents and document sets.
NOTE 4 The number and kinds of documents in a documentation can differ according to purpose.
3.6
document kind
type of document defined with respect to its specified content of information and form of
presentation
NOTE Sometimes the term document type is used for the same concept.
3.7
document kind class
group of document kinds having similar characteristics concerning the content of information
independent of the form of presentation
3.8
object
entity treated in a process of design, engineering, realization, operation, maintenance,
dismantling and disposal
[IEC 81346-1* (61346-1)]. * to be published
NOTE 1 The object may refer to a physical or non-physical ”thing” that might exist, exist or did exist.
NOTE 2 The object has information associated to it.
3.9
system
set of interrelated objects with the purpose of performing a common function
3.10
plant
assembly of different systems on a specific site

– 10 – 61355-1 © IEC:2008
3.11
equipment
components and parts used or required for a particular purpose
3.12
project
generic term for the sum of commercial, technical, and other activities related to a specific
object
3.13
object designation
identifier of a specific object in a given context
NOTE Examples of such designations are: reference designation, type number, serial number, name.
3.14
document designation
identifier of a specific document in relation to an object to which the document is assigned
3.15
page counting number
identifier of a specific page of a document identified by a document designation
3.16
document page designation
identifier of a specific page as part of a multi-page document applying a document
designation and a page counting number
4 Basic concepts on documents and documentation
4.1 General
Documents provide information necessary for different activities and purposes during the life
cycle of a plant, system or equipment. The term "document" is not restricted to a paper-based
presentation of the information. It also includes other forms of information storage, such as
data files on electronic media or in a data base.
Information requires an agreed form of presentation to be understandable for a human reader.
In most cases, such a form is defined only for traditional paper-based documents or similar
ways of presentation. In this standard, descriptions of document kinds are referring to the
paper-based presentation. Other forms of visualisation, for example presentation on a video
screen, are assumed to be equal or at least similar to the paper-based presentation.
In the context of this standard, it is necessary to distinguish between the following concepts
and their interrelationship (see Figure 1):
• document kind;
• document;
• composite document;
• document set;
• documentation.
61355-1 © IEC:2008 – 11 –
Documentation
characterizes collected to
Document set
Document X
Document kind A
Document kind B Document Y
Composite
Document kind C
Document V
document Z
Composite
document W
IEC  203/08
Figure 1 – Interrelation of documentation-related terms
4.2 Document kinds
A document kind shall be defined by
• a generic description of the characteristic type of information that a document prepared on
the basis of this document kind is intended to contain; and
• its form of presentation.
Two different documents are of the same kind if they have similar characteristics concerning
the content of information and the same form of presentation.
A document kind should neither be defined with respect to a described object nor to its
intended purpose.
Each document kind is assigned a document kind class, see Clause 5.
4.3 Documents
A document:
• may provide specific information on an object of interest and may refer to that object;
NOTE 1 Documents can exist for which no clear object relationship is to be identified.
• may be classified by the relevant document kind class;
• may refer to its purpose (for what activity it is needed);
• may be visualized in an agreed form of presentation.
NOTE 2 A document can consist of one or more document pages.
4.4 Composite documents
A composite document has different parts of information content, each part being normally
related to a different document kind class. For example, a document presenting an
arrangement drawing together with a parts list is considered a composite document.
Special rules are required to assign a document kind class to a composite document, see 5.3.

– 12 – 61355-1 © IEC:2008
4.5 Document sets
A document set is a collection of different documents, i.e. documents and composite
documents, which is intended to be treated as a unit. A document set is not assigned a
common classification.
NOTE If a document set requires a common classification, it basically becomes a composite document.
4.6 Documentation
A documentation is a collection of different documents, composite documents and document
sets related to a given subject. The constituents of a documentation are classified individually.
The documentation as a whole is not assigned a common classification.
5 Classification of documents
5.1 Classification principles
The classification of documents shall be based on their characteristic content of information.
NOTE Documents are characterized by document kinds which are classified in the same way as documents.
If a document can be characterized in different ways, the leading content of information shall
govern its classification.
Documents shall be classified at least in two levels (Class-levels A2 and A3). They may
additionally be classified in a preceding level (Class-level A1), see Figure 2.
The same for all technical area classes
Technical area
Main class Subclass
class
Class-level A1
Class-level A2 Class-level A3
(optional)
IEC  204/08
Figure 2 – Classification structure of documents
Class-level A1 represents documents containing information related to a specific technical
area. It is optional and may be applied when documents from different technical areas come
together, for example within one project, and which need to be clearly distinguishable from
each other. Each technical area class shall apply the same main-classes and subclasses
represented by Class-levels A2 and A3.
NOTE Not all main classes and subclasses may be of relevance in each technical area.
Class-level A2 represents main-classes of documents. Documents are assigned to the same
main-class if they contain the same characteristic information.
Class-level A3 represents subclasses of documents related to one specific main-class.
Documents belong to the same subclass if they have a common description of the content of
information within the relevant main-class and subclass.
Each main-class and subclass is defined in this standard by a short description of the
characteristic content of information (see Table A.2). The description of a subclass is valid
only together with the description of the relevant main-class.

61355-1 © IEC:2008 – 13 –
5.2 Assigning documents to classes
A document shall be associated with a main-class and a related subclass when the main
characteristic content of information of the document matches completely or at least partly the
descriptions for a main-class and subclass.
There may be cases where the content of information matches the main-class but the content
of information is not completely or at least partly matching the subclass description. In such
cases, the unspecified subclass with letter Z may be used as an exception. The use of this
subclass shall be restricted. If used it should be specified in the document or in supporting
documentation.
NOTE Classes with letter Z are preliminary. Users are encouraged to apply for future standardization of missing
class-definitions.
5.3 Assigning composite documents to classes
A composite document shall be associated with a main-class and a related subclass
according to the leading document kind class identified in the composition.
For example, an arrangement drawing showing also a parts list is classified as an
arrangement drawing if this is considered the leading part.
If no leading constituent is obvious, any of the constituent document kind classes may be
chosen.
NOTE Each individual constituent of a composite document may be assigned its individual document kind class.
This may be advantageous for the use of computer-aided documentation systems.
5.4 Layout of document kind classification code (DCC)
Figure 3 shows the layout of the document kind classification code (DCC). It consists of the
prefix sign "&" (ampersand) followed by a code consisting of three letters which are defined in
this standard. The position of each code-letter is indicated by A1, A2, and A3. When
presented in a document, the prefix sign may be omitted if there is no risk of
misunderstanding.
DCC
& (A1) A2 A3
Prefix sign
Letter code for technical area
class (optional)
Letter code for main class of
document kinds
Letter code for sub-class of
document kinds
IEC  205/08
Figure 3 – Structure of document kind classification code
The positions in the DCC are defined as follows:
• A1 represents Class-level A1. It is optional and indicates the technical area class (see
Table A.1);
NOTE 1 The term "technical area" is to be taken in a more general sense; it also covers, for example,
management aspects.
– 14 – 61355-1 © IEC:2008
• A2 represents Class-level A2. It is mandatory and indicates the main class of documents
(see Table A.2);
• A3 represents Class-level A3. It is mandatory and indicates the subclass of documents
defined individually for each main class (see Table A.2).
A document kind classification code (DCC) shall consist of either a two-letter code (A2, A3) or
a three-letter code (A1, A2, A3).
NOTE 2 The DCC is classifying a document and does not identify a document kind unambiguously. For the
purpose of identification of document kinds, a separate identifier is introduced in IEC 61355 DB (the IEC-database
collection of document kinds).
For A1, A2 and A3 only the characters shown in Tables A.1 and A.2 shall be used.
NOTE 3 Only characters A through Z, except O and I are used.
Table A.2 presents code letters for the main classes and subclasses of documents. The use
of letter codes representing A2 and A3 is mandatory whenever a DCC is applied.
Table A.1 presents the code letters that shall be applied when documents from different
technical areas come together in one project and confusion is likely. Other letters than those
shown in Table A.1 may also be used for specified purposes if agreed between parties
involved, for example in a project.
A document shall be assigned a technical area class according to its main content of
information, not according to the technical area to which an organization (that prepared the
document) belongs.
EXAMPLES
• A building drawing prepared by an architect will be classified as "civil engineering
document".
• A building drawing prepared in an electrical engineering department will be classified as
"civil engineering document" as well.
In certain cases, the technical area classification may change when the content of information
changes during the life cycle, for example:
• a building drawing prepared by an architect and supplemented by an electrical engineer,
with the purpose to become an arrangement drawing for the electrical installation, may
change its technical area class from "civil engineering" to "electrotechnology". (It actually
can become a new document kind in this case.) The arrangement drawing for the
electrical installation is based on a copy of the building drawing while the original building
drawing continues to exist for other purposes, see Figure 4).
Building drawing
Architect
C.
Electrical installation
information
copy
Arrangement
(Building drawing) drawing
Electrical engineer
E.
Life-cycle
IEC  206/08
Figure 4 – Example of a document with changed technical area classification

61355-1 © IEC:2008 – 15 –
The code letters A and B in Cass-level A1 may be used for those documents that are related
to more than one specific technical area.
6 Document designation
6.1 Document and document page designation
A document designation according to this standard is an optional means that serves the
following purposes:
• provide a means for stating a relationship between a document and the object for which
the document is valid;
NOTE 1 The term object includes object types. If a document is related to an object type, it can be valid for all
occurring objects of the same type.
NOTE 2 Indicating relationships between documents and object by using document designations requires
adequate means for assuring that all relevant documents are found for the object, for example an object-related
document list.
• provide the possibility to specify sorting criteria for object related documentation;
• provide the possibility to identify different document kinds related to an object;
• provide an object-related method to refer to documents and document pages, for example
from other documents.
For these purposes, a coded document designation is introduced that combines a designation
of the object to which the document is assigned and the DCC together with a counting
number. In addition, this document designation may be supplemented by a page counting
number (see Figure 5).
NOTE 3 For the purpose of identification of documents, a document numbering system or other numbering
systems are normally used. In most cases they fulfil identification purposes inside the borderlines of an
organization together with organization-specific requirements. A document designation according to this standard
is not intended to replace any of these numbering systems but serves as an additional means for the purposes
described.
Document page designation
Document designation
DCC
Object designation & A1 A2 A3 N N N / A….N
Designation of the object to
which the document is
assigned
Prefix sign indicating DCC
DCC (see Tables A.1 and A.2
- position A1 optional)
Document counting number
(optional)
Separator sign (only if a
page counting number is used)
Page counting number
(optional)
IEC  207/08
Figure 5 – Principle of document designation

– 16 – 61355-1 © IEC:2008
The object designation shall unambiguously specify the object to which a document is
assigned. This implies that an object designation shall be (or be made) unambiguous in a
specified context.
NOTE 4 A reference designation fulfils the requirement of being unambiguous by itself. For objects without
reference designation any other designation may be used, for example a product ID, a type designation, a project
number, or even a plain text term, provided the string of characters is unambiguous.
Different documents related to the same object shall be differentiated by means of the DCC
and, if not sufficient, supplemented by a document counting number (numerical, maximum
three digits) (example: operation instruction and maintenance instruction both being classified
by EDC). Document counting numbers are not assigned specific meanings. Their use in
addition to the DCC is free and may be chosen according to other purposes as well.
NOTE 5 The document counting number is neither intended nor recommended to be used together with the DCC
as document kind identifier. An identifier serves a different purpose and is recommended, if required, to be
established and kept separately.
Examples of document designations:

-W1M3&DA Data sheet for motor 3 in transport system 1
-W1M3&EDC1   Operating instruction for motor 3 in transport system 1
-W1M3&EDC2   Maintenance instruction for motor 3 in transport system 1

Project XYZ&ABE Time schedule from overall project management for project XYZ
Project XYZ&EBE Time schedule from electrical engineering for project XYZ

The page counting number is optional and shall apply alphabetical characters (letters A. Z,
except I and O) and/or numerical characters (figures 0, 1. 9). It shall be separated from the
document designation part by the character "/" (solidus), (see Figure 5). The presentation of
the separator sign may be omitted if no confusion is likely, for example when the page
counting number is shown in a separate section in the title block of a document or in a
separate column in a table.
The page counting number allows for a designation of each single page in a multi-page
document in combination with the document designation. It may, in addition, be used for
enforcing a desired grouping or sorting of pages in a document, see Figure 6.
NOTE 6 The page counting number is normally not identical to the page number related to a document ID or
drawing number.
Circuit diagram =ABC123&FS
Supply circuits /A1 Input circuits /B1 Output circuits /C1
Supply circuits /A2 Input circuits /B2 Output circuits /C2
Input circuits /B3 Output circuits /C3

IEC  208/08
Figure 6 – Application of page counting number for page grouping
The page counting number should, for better readability, be restricted to a maximum of six
data positions.
61355-1 © IEC:2008 – 17 –
Examples for document designations including page counting numbers:
=G1K1&EFS/MA7 Page MA7 of a circuit diagram (EFS) related to object with reference designation =G1K1
-W1M3&DC01/3 Page 3 of an operating instruction (DC01) for motor 3 in transport system 1
Document designations together with page counting numbers are normally presented in the
title block of a document. An example of their use in a title block according to ISO 7200 and
examples for their application in cross-references are given in IEC 61082-1.
6.2 Document designation for identification purposes
The content of a document normally changes during its life-cycle while the document
designation according to 6.1 may remain the same. Therefore, the document designation is
not by itself identifying a document with respect to actual information content in a given life-
cycle step. Supplementary information is required for that purpose, such as a document
version identifier, a revision index or a status designation (see IEC 82045-1 and IEC 82045-2;
for status information see also Clause B.2).
Such supplementary identifiers(version identifier, revision index, status designation, etc.) shall
be treated as separate information elements, independent from the document designation.
Additional information is required to make a document designation identifying in a general
sense. For this purpose, the following supplementary information may be considered:
• international country code (Alpha-2 code) according to ISO 3166-1, indicating the country
where the document in question was prepared;
• company responsible for the preparation of the document. A company code according to
national standards may be applied if used with the international country code;
• project designation which may be established in the form of company-internal codes or
similar;
• language code according to ISO 639-1, (Alpha-2 code).
NOTE The same principles apply also if an organization-specific document numbering system is used and a
document identifier is shown in the title block according to ISO 7200.
7 Documentation
A documentation of an object can consist of many documents of different kinds. As the object
may consist of distinct constituent objects, each of these may be assigned a separate
documentation with different document kinds as well. Therefore, the documentation of an
object can become very complex and requires adequate structuring. Documentation of an
object is often split into different parts for different purposes, for example different types of
specifications, information for use and verifying documents.
A recommended method for structuring a documentation is to divide it into document sets that
are assigned to the constituents represented in the structure of the object (plant, system, etc.)
to be documented.
NOTE 1 Other methods of forming a documentation can exist that are not dealt with in this standard.

The document designation according to Clause 6 is designed for this purpose. It allows the
assignment of documents to objects and sub-objects and the differentiation of different

– 18 – 61355-1 © IEC:2008
document kinds. All documents belonging to the same object form the documentation for this
object.
One of the following methods for the establishment of an object-related documentation should
be applied:
a) each object is assigned a main document that refers to all complementary documents
(see IEC 62023); or
b) by assigning the same object designation to each document in the documentation.
For the second method, the following is applicable.
Figure 7 shows an example of the documentation that is related to two different structures
(function-oriented and product-oriented) of a system. Within the treelike structures those
nodes (objects) are indicated to which documents are assigned. Accordingly, the documents
are designated with the reference designation of the corresponding node in combination with
the DCC and, where it is needed, with a document counting number. In this way, a
documentation is composed and can be filed as illustrated.
NOTE 2 Which document kinds are needed, and how they are related and filed is subject to agreement between
parties in a contract.
The following principles apply:
• documents related to a specific object shall include, directly or indirectly by reference,
required information on its sub-objects;
• sub-objects represented by lower-level nodes in a structure may
...