Preparation of object lists including parts lists (IEC 62027:2011)

This International Standard 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.

Erstellung von Objektlisten, einschließlich Teilelisten (IEC 62027:2011)

Etablissement des listes d'objet, y compris des nomenclatures de composants (CEI 62027:2011)

La CEI 62027:2011 donne les règles et les lignes directrices pour la présentation de l'information dans les listes d'objets ainsi que les règles spécifiques pour ces documents. Elle est applicable aux listes d'objets telles que les nomenclatures de composants, les listes de fonctions et les listes d'emplacements utilisées lors du processus de conception et d'ingénierie, destinées à être fournies avec la documentation. Cette deuxième édition annule et remplace la première édition parue en 2000. Cette édition constitue une révision technique. Cette édition inclut les modifications importantes suivantes par rapport à l'édition précédente: - la terminologie utilisée dans la publication a été adaptée à celle utilisée dans les normes CEI 81346-1:2009, CEI 62507-1:2010 et la CEI/PAS 62569-1:2009; - le terme 'liste d'objets' a été introduit comme terme générique et le terme 'nomenclature de composants' est utilisé comme terme spécifique pour les listes d'objets associées à la structure du produit; - l'Annexe A de l'édition précédente a été retirée et en partie remplacée par le paragraphe 6.2 et une référence à la CEI 61355 DB; - une nouvelle Annexe A donnant des directives sur la présentation des sous-ensembles de propriétés caractéristiques a été introduite; - une nouvelle Annexe B donnant des définitions sources et des références aux types d'éléments de données utilisés a été introduite; - les exemples des Annexes C, D et E (correspondant aux B, C et D de l'édition précédente) ont été pourvus de commentaires.

Priprava objektnih seznamov vključno s kosovnicami (IEC 62027:2011)

Ta mednarodni standard določa pravila in smernice za predstavitev informacij na objektnih seznamih ter posebna pravila za take dokumente. Standard se uporablja za objektne sezname, kot so kosovnice, seznami funkcij in seznami lokacij za uporabo med projektiranjem in konstruiranjem, ki se priložijo dokumentaciji.

General Information

Status
Published
Publication Date
16-Jan-2012
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
16-Jan-2012
Due Date
22-Mar-2012
Completion Date
17-Jan-2012

RELATIONS

Effective Date
01-Mar-2012
Effective Date
06-May-2014

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SLOVENSKI STANDARD
SIST EN 62027:2012
01-marec-2012
1DGRPHãþD
SIST EN 62027:2002
3ULSUDYDREMHNWQLKVH]QDPRYYNOMXþQRVNRVRYQLFDPL ,(&
Preparation of object lists including parts lists (IEC 62027:2011)
Erstellung von Objektlisten, einschließlich Teilelisten (IEC 62027:2011)

Etablissement des listes d'objet, y compris des nomenclatures de composants (CEI

62027:2011)
Ta slovenski standard je istoveten z: EN 62027:2012
ICS:
01.110 7HKQLþQDGRNXPHQWDFLMD]D Technical product
L]GHONH documentation
29.020 Elektrotehnika na splošno Electrical engineering in
general
SIST EN 62027:2012 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62027:2012
---------------------- Page: 2 ----------------------
SIST EN 62027:2012
EUROPEAN STANDARD
EN 62027
NORME EUROPÉENNE
January 2012
EUROPÄISCHE NORM
ICS 29.020 Supersedes EN 62027:2000
English version
Preparation of object lists, including parts lists
(IEC 62027:2011)

Etablissement des listes d'objet, y compris Erstellung von Objektlisten, einschließlich

des nomenclatures de composants Teilelisten
(CEI 62027:2011) (IEC 62027:2011)

This European Standard was approved by CENELEC on 2011-11-16. 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, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62027:2012 E
---------------------- Page: 3 ----------------------
SIST EN 62027:2012
EN 62027:2012 - 2 -
Foreword

The text of document 3/1049/FDIS, future edition 2 of IEC 62027, prepared by IEC TC 3 "Information

structures, documentation and graphical symbols" was submitted to the IEC-CENELEC parallel vote and

approved by CENELEC as EN 62027:2012.
The following dates are fixed:
(dop) 2012-08-16
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2014-11-16
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 62027:2000.

EN 62027:2011 includes the following significant technical changes with respect to EN 62027:2000:

— the terminology used in the publication has been adapted to the one used in EN 81346-1:2009,

EN 62507-1:2011 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;

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.
Endorsement notice

The text of the International Standard IEC 62027:2011 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 61360-1:2009 NOTE Harmonized as EN 61360-1:2010 (not modified).
IEC 82045-1:2001 NOTE Harmonized as EN 82045-1:2001 (not modified).
IEC 82045-2:2004 NOTE Harmonized as EN 82045-2:2005 (not modified).
ISO 80000 series NOTE Harmonized in EN ISO 80000 series.
ISO 10303-44:1994 NOTE Harmonized as ENV ISO 10303-44:1995 (not modified).
---------------------- Page: 4 ----------------------
SIST EN 62027:2012
- 3 - EN 62027:2012
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 61355 2008 IEC Collection of standardized and - -
established document kinds
IEC 61355-1 2008 Classification and designation of documents EN 61355-1 2008
for plants, systems and equipment -
Part 1: Rules and classification tables
IEC 61360 - Component data dictionary (CDD) - -
1) 1)
IEC 62023 201X Structuring of technical information and EN 62023 201X
documentation
IEC 62507-1 2010 Identification systems enabling unambiguous EN 62507-1 2011
information interchange - Requirements -
Part 1: Principles and methods
IEC 81346-1 2009 Industrial systems, installations and EN 81346-1 2009
equipment and industrial products -
Structuring principles and reference
designations -
Part 1: Basic rules
IEC 81346-2 - Industrial systems, installations and EN 81346-2 -
equipment and industrial products -
Structuring principles and reference
designations -
Part 2: Classification of objects and codes for
classes
IEC 82045-2 2004 Document management - EN 82045-2 2005
Part 2: Metadata elements and information
reference model
IEC/PAS 62569-1 2009 Generic specification of information on - -
products -
Part 1: Principles and methods
ISO 639-1 - Codes for the representation of names of - -
languages -
Part 1: Alpha-2 code
ISO 6433 - Technical drawings - Item references EN ISO 6433 -
ISO 7200 - Technical product documentation - Data fields EN ISO 7200 -
in title blocks and document headers
At draft stage.
---------------------- Page: 5 ----------------------
SIST EN 62027:2012
EN 62027:2012 - 4 -
Publication Year Title EN/HD Year
ISO 13584-42 2010 Industrial automation systems - -
and integration -
Parts library -
Part 42: Description methodology:
Methodology for structuring parts families
---------------------- Page: 6 ----------------------
SIST EN 62027:2012
IEC 62027
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Preparation of object lists, including parts lists
Établissement des listes d’objets, y compris les nomenclatures de composants
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29-020 ISBN 978-2-88912-708-5
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 62027:2012
– 2 – 62027  IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope ............................................................................................................................... 7

2 Normative references ....................................................................................................... 7

3 Terms and definitions ....................................................................................................... 8

3.1 General terms ......................................................................................................... 8

3.2 Terms related to documentation ............................................................................ 10

3.3 Specific terms related to object lists ...................................................................... 11

3.4 Alphabetical index of terms ................................................................................... 12

4 General .......................................................................................................................... 12

4.1 Types of object lists .............................................................................................. 12

4.2 Forms of presentation of an object list body .......................................................... 13

4.3 Table header ......................................................................................................... 13

4.4 List items............................................................................................................... 14

5 Requirements for the parts list body ............................................................................... 14

5.1 Classification of parts lists ..................................................................................... 14

5.2 Relation to the specified object .............................................................................. 14

5.3 Content of a list item ............................................................................................. 15

5.4 Specification of characteristic properties ............................................................... 16

5.4.1 Overview ................................................................................................... 16

5.4.2 Identification of the occurrence .................................................................. 16

5.4.3 Usage ........................................................................................................ 16

5.4.4 Characteristic properties related to the occurrence .................................... 17

5.4.5 References related to the occurrence ........................................................ 17

5.4.6 Amount ...................................................................................................... 17

5.4.7 Identification of the type of part ................................................................. 17

5.4.8 Description of the type of part .................................................................... 18

5.4.9 Characteristic properties for the type of part .............................................. 19

5.4.10 References to documents related to the type of part .................................. 19

5.5 Layout of the parts list body .................................................................................. 20

5.5.1 General ..................................................................................................... 20

5.5.2 Columns in Class A parts lists ................................................................... 20

5.5.3 Columns in Class B parts lists ................................................................... 21

5.5.4 List items ................................................................................................... 21

5.5.5 Sorting of list items .................................................................................... 21

6 Requirements for an object list document ....................................................................... 22

6.1 General ................................................................................................................. 22

6.2 Document kind names ........................................................................................... 22

Annex A (informative) Presentation of characteristic properties in a list item ........................ 23

Annex B (normative) Data element type definitions .............................................................. 25

Annex C (informative) Example of a parts list (object list) document with an parts list

body of Class A .................................................................................................................... 28

Annex D (informative) Example of a parts list (object list) document with a parts list

body of Class B .................................................................................................................... 29

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SIST EN 62027:2012
62027  IEC:2011 – 3 –

Annex E (informative) Example of a parts list document for manufacturing purposes

with a parts list body of Class A ............................................................................................ 30

Bibliography .......................................................................................................................... 32

Figure 1 – Illustration of the organization of object lists (in one aspect) .................................. 6

Figure 2 – Presentation of an object list body in a document ................................................. 13

Table 1 – Information contained in a list item for a constituent object .................................... 15

---------------------- Page: 9 ----------------------
SIST EN 62027:2012
– 4 – 62027  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PREPARATION OF OBJECT LISTS, INCLUDING PARTS LISTS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this 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 62027 has been prepared by IEC technical committee 3:
Information structures, documentation and graphical symbols.

This second edition cancels and replaces the first edition published in 2000. This edition

constitutes a technical revision.

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 81346-1:2009:2009, IEC 62507-1:2010:2010 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;
---------------------- Page: 10 ----------------------
SIST EN 62027:2012
62027  IEC:2011 – 5 –

• 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;
The text of this standard is based on the following documents:
FDIS Report on voting
3/1049/FDIS 3/1070/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.

The committee has decided that the contents of this publication will remain unchanged until

the stability 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 11 ----------------------
SIST EN 62027:2012
– 6 – 62027  IEC:2011
INTRODUCTION

An object list is primarily used to list and specify the constituent objects (components) of the

overall object or system to which the object list applies.

It is generally recognized that information on products, installations and systems can be

organized on the basis of tree-like, hierarchical, structures. The structure represents the way

in which an industrial system or a product is divided into sub-systems or components,

designated by the general term “constituent objects”. In the context of this International

Standard, ”object” refers to any entity treated in a process of development, implementation,

usage and disposal of a plant, installation, system, equipment, etc., or part thereof, in

accordance with the definition in 3.1.1.

NOTE In the context of other standards, the term “item” is sometimes used with the same meaning as “object”.

Depending on the “aspect” different structures can be recognized, for example a “product-

oriented structure”, a “function-oriented structure” or a “location-oriented structure”. A specific

constituent object may be of relevance in one structure only, or in more than one. For further

information on structures and structuring (see IEC 81346-1:2009).

An object list is implicitly or explicitly associated with such a structure. The object list concept

described in this International Standard is therefore applicable in all structures defined in

accordance with IEC 81346-1:2009.

Object lists relevant to the manufacturing and assembly of a product, associated with the

product-oriented structure, and generally named parts lists, usually cover only one assembly

level each, and the main assembly is normally described by a system of single-level parts

lists. An example of a system of single-level parts lists is shown in Figure 1.

Object lists are often generated as reports from a database containing information on the

entire structure.
Level 0 ................................
Level 1 ................................
Level 2 ................................
1 2 E 3
D 4
Level 3 ................................
3 6 8
5 7 9
IEC 2145/11

NOTE A is the main assembly; B, C, D and E are sub-assemblies; 1, 2, 3, etc. are parts. A, B, C, D and E are

defined by single level parts lists, the content of each indicated by means of dashed lines.

Figure 1 – Illustration of the organization of object lists (in one aspect)
---------------------- Page: 12 ----------------------
SIST EN 62027:2012
62027  IEC:2011 – 7 –
PREPARATION OF OBJECT LISTS, INCLUDING PARTS LISTS
1 Scope

This International Standard 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.

NOTE 1 The scope of such object lists covers either an object with occurring constituents (c.f. IEC 81346-1:2009)

or an assembly with types of constituents (c.f. ISO 7573).

NOTE 2 The role of such lists as a main document in structured documentation is described in IEC 62023:-.

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 61355:2008, IEC Collection of standardized and established document kinds, available at

http://std.iec.ch/iec61355

IEC 61355-1:2008, Classification and designation of documents for plants, systems and

equipment – Part 1: Rules and classification tables

IEC 61360, Component data dictionary (CDD).Available from: http://std.iec.ch/iec61360

IEC 62023 , Structuring of technical information and documentation

IEC 62507-1:2010, Identification systems enabling unambiguous information interchange –

Requirements – Part 1: Principles and methods

IEC 81346-1:2009, Industrial systems, installations and equipment and industrial products –

Structuring principles and reference designation – Part 1: Basic rules

IEC 81346-2, Industrial systems, installations and equipment and industrial products –

Structuring principles and reference designations – Part 2: Classification of objects and codes

for classes

IEC 82045-2:2004, Document management – Part 2: Metadata elements and information

reference model

IEC/PAS 62569-1:2009, Generic specification of information on products – Part 1: Principles

and methods

ISO 639-1, Codes for the representation of names of languages – Part 1: Alpha-2 code

ISO 6433, Technical drawings – Item references
—————————
In preparation.
---------------------- Page: 13 ----------------------
SIST EN 62027:2012
– 8 – 62027  IEC:2011

ISO 7200, Technical product documentation – Data fields in title blocks and document

headers

ISO 13584-42:2010, Industrial automation systems and integration – Parts library – Part 42:

Description methodology: Methodology for structuring parts families
3 Terms and definitions

For the purposes of this document, the following terms and definitions apply. In the

definitions, terms that are defined elsewhere in this clause are shown in italics.

An alphabetical index of the terms is contained in 3.4.

NOTE Definitions taken over from other International Standards are not necessarily literally cited, but adapted to

the form required for definitions according to the ISO/IEC Directives.
3.1 General terms
3.1.1
object
entity treated in a process of development, implementation, usage and disposal

NOTE 1 The object may refer to a physical or non-physical “thing”, i.e. anything that might exist, exists or did

exist.
NOTE 2 The object has information associated to it.
[IEC 81346-1:2009, definition 3.1]
3.1.2
system

set of interrelated objects considered in a defined context as a whole and separated from their

environment

NOTE 1 A system is generally defined with the view of achieving a given objective, e.g. by performing a definite

function.

NOTE 2 Elements of a system may be natural or man-made material objects, as well as modes of thinking and the

results thereof (e.g. forms of organisation, mathematical methods, programming languages).

NOTE 3 The system is considered to be separated from the environment and from the other external systems by

an imaginary surface, which cuts the links between them and the system. [

NOTE 4 The term “system” should be qualified when it is not clear from the context to what it refers, e.g. control

system, colorimetric system, system of units, transmission system.

NOTE 5 When a system is part of another system, it may be considered as an object as defined in this standard.

[IEC 81346-1:2009, definition 3.2]
3.1.3
aspect
specified way of viewing an object
[IEC 81346-1:2009, definition 3.3]
3.1.4
structure

organization of relations among objects of a system describing constituency-relations

(consists of/is a part of)
[IEC 81346-1:2009, definition 3.9]
---------------------- Page: 14 ----------------------
SIST EN 62027:2012
62027  IEC:2011 – 9 –
3.1.5
occurrence (of an object)
particular case implying that an object appears in a system
3.1.6
domain
distinguished part of an abstract or physical space where something exists
NOTE A domain can be e.g. an organization or a country or a part of it.
[IEC 62507-1:2010, definition 3.2]
3.1.7
identifier

attribute associated with an object to unambiguously identify it in a specified domain

NOTE In an identification system several types of identifiers may be required.
[IEC 62507-1:2010, definition 3.8]
3.1.8
identification number
string of characters representing the value of the identifier

NOTE 1 It is practice that although the term says “number” the string can contain other types of characters as

well.

NOTE 2 Note that the term “identifier” as being an attribute and the term ”identification number” as being the

value of that attribute are here considered different things, but they are often mixed in existing definitions.

NOTE 3 Identification numbers are often required to be unique (an object shall have one number only). This is an

unnecessary strong requirement, it is sufficient if they are unambiguous within a specified domain. An object may

have more than one identification number.

Furthermore, it is assumed in the definition that an organization may be responsible for more than one

identification number domain. This is a commonly occurring situation when organizations are merged, etc.

[IEC 62507-1:2010, definition 3.5]
3.1.9
domain number
domain ID
identification number assigned to a domain
NOTE An assigned domain number can coincide with the organization ID.
[IEC 62507-1:2010, definition 3.3]
3.1.10
reference designation

identifier of a specific object with respect to the system of which the object is a constituent,

based on one or more aspects of that system
[IEC 81346-1:2009, definition 3.11]

NOTE If a set of drawings for a product is structurally based on consist-of/is-part-of relations, part reference

numbers are virtually the same thing as numeric product-oriented reference designations.

3.1.11
reference designation set

collection of two or more reference designations assigned to an object of which at least one

unambiguously identifies this object
-----------------
...

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