ISO/TS 15926-4:2024

Industrial automation systems and integration - Integration of life-cycle data for process plants including oil and gas production facilities - Part 4: Core reference data

This document specifies the set of core reference data items which can be used to record information about process plants, including oil and gas production facilities. The following are within the scope of this document: - core classes for process plants, including oil and gas production facilities; - information about a reference data item. NOTE The total set of information about a reference data item can be found in Table B.1. The following are outside the scope of this document: - data requirements for additional reference data items; - the procedures to be followed for registration and maintenance of additional reference data items.

Systèmes d'automatisation industrielle et intégration — Intégration de données de cycle de vie pour les industries de "process", y compris les usines de production de pétrole et de gaz — Partie 4: Données de référence initiales

General Information

• Status: Published
• Publication Date: 02-Jul-2024
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 75.020 - Extraction and processing of petroleum and natural gas
• Technical Committee: ISO/TC 184/SC 4 - Industrial data
• Drafting Committee: ISO/TC 184/SC 4 - Industrial data
• Current Stage: 9092 - International Standard to be revised
• Start Date: 11-Nov-2024
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO/TS 15926-4:2019 - Industrial automation systems and integration - Integration of life-cycle data for process plants including oil and gas production facilities - Part 4: Initial reference data
• Effective Date: 06-Jun-2022

Overview

ISO/TS 15926-4:2024 - "Industrial automation systems and integration - Integration of life-cycle data for process plants including oil and gas production facilities - Part 4: Core reference data" specifies the core reference data items used to record life‑cycle information for process plants and oil & gas facilities. This third edition updates the reference data library (spreadsheets and URIs), aligns attributes to ISO/TS 15926-6, and adds informative guidance on libraries, integration and conformance.

Keywords: ISO/TS 15926-4:2024, core reference data, reference data library, ISO 15926, process plants, oil and gas, life‑cycle data.

Key Topics

• Core classes and taxonomy: Defines a taxonomy of core classes (e.g., pipe, pump, floor) and related non‑plant classes such as activities, milestones and statuses.
• Reference data items: Specifies the information required to describe each reference data item (see Table B.1 for the full attribute set).
• Reference data library modules: Organizes data into modules (spreadsheets) by subject area (e.g., Electrical) and lists module versions (Annex A).
• Data model alignment: Intended for use with the ISO 15926 conceptual data model (see ISO 15926‑2:2003) to enable shared implementation in databases and data warehouses.
• Normative vs informative content: Contains normative annexes for library modules and attribute columns and informative annexes on URIs, class types, library types, and cross‑part applications (Annexes B–F).
• Scope and limits: Covers core reference items only; procedures for registration/maintenance of additional items are outside scope.

Applications

• Asset owners & operators: Standardize life‑cycle data across plant design, construction, operation and decommissioning.
• EPCs and contractors: Use core reference data to ensure consistent tagging, classification and exchange of engineering data.
• Systems integrators & software vendors: Implement ISO 15926 compatible databases, data warehouses, and integration middleware.
• Equipment suppliers: Map product classes to standard reference data to improve interoperability with clients’ engineering data. Practical benefits include improved interoperability, reduced data translation effort, and a foundation for long‑term digital asset management across process and oil & gas facilities.

Related Standards

• ISO 15926‑2:2003 - Data model (conceptual basis for life‑cycle representation)
• ISO/TS 15926‑6 - Reference data technical rules (attribute alignment mentioned in this edition)
• Other parts of the ISO 15926 series - for conformance criteria and extended reference data use cases

For implementers, ISO/TS 15926-4:2024 provides the authoritative core reference dataset and organization needed to integrate and exchange process plant life‑cycle data reliably.

Standards Content (Sample)

Technical
Specification
ISO/TS 15926-4
Third edition
Industrial automation systems
2024-07
and integration — Integration of
life-cycle data for process plants
including oil and gas production
facilities —
Part 4:
Core reference data
Systèmes d'automatisation industrielle et intégration —
Intégration de données de cycle de vie pour les industries de
"process", y compris les usines de production de pétrole et de gaz —
Partie 4: Données de référence initiales
Reference number
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms .4
4 Reference data library . 4
Annex A (normative) Reference data library module versions . 6
Annex B (normative) Columns in the spreadsheets representing the attributes of ISO/TS
15926-4:20— (this version of this document) . 9
Annex C (informative) URI for the reference data library .12
Annex D (informative) Explanation of types of classes .13
Annex E (informative) Types of libraries or collections of terms related to reference data
libraries . 14
Annex F (informative) Application of ISO/TS 15926-4 (this document) in other parts of the ISO
15926 series .16
Bibliography .26

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO 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, ISO 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
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 184, Automation systems and integration,
Subcommittee SC 4, Industrial data.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
This document was prepared by Technical Committee ISO/TC 184, Automation systems and integration,
Subcommittee SC 4, Industrial data.
This third edition replaces the second edition (ISO 15926-4:2019), which has been technically revised.
The main changes are as follows:
— The list of spreadsheets has been updated and includes the correct address on www.standards.iso.org
and with the correct version number of the spreadsheets;
— The content of the spreadsheets has been updated to reflect the projects of the past years. In each
spreadsheet insert, a list has been included of the changes compared to the previous version;
— The list of attributes has been aligned to ISO/TS 15926-6;
— Informative Annex E that describes types of libraries and collections of terms related to reference data
libraries, has been added;
— Informative Annex F has been added that describes the application of ISO/TS 15926-4 (this document)
in other parts of the ISO 15926 series, including conformance criteria and an example of integration of
various reference data libraries into a specific project reference data library.
A list of all parts in the ISO 15926 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
Introduction
The ISO 15926 series provides a representation of process industries facility life-cycle information. This
representation is specified by a generic, conceptual data model that is suitable as the basis for implementation
in a shared database or data warehouse. The data model is designed to be used in conjunction with reference
data, i.e. standard instances that represent information common to a number of users, production facilities,
or both. The support for a specific life-cycle activity depends on the use of appropriate reference data in
conjunction with the data model.
The ISO 15926 series is a series of parts, each published separately. This document specifies the core set of
reference data items. This document is a taxonomy of classes, and of properties which are unrelated to each
other. This document also contains non-plant classes (e.g. activity classes, milestones, statuses).
The reference data in this document have been developed since 1990 from the experience of operators,
contractors and equipment suppliers operating in the plant engineering supply chain. The reference data
therefore largely cover process plants installed in the oil, gas, process and power industries. The reference
data can be extended though change requests (CRs) with data that have not yet been covered, such as specific
nuclear data and specific pulp and paper equipment data. Such CRs will be processed according to the ISO TC
184/SC4 procedure for maintenance of reference data. In this procedure, the ISO/TS 15926-6 reference data
are checked against the technical rules given in ISO/TS 15926-6.

v
Technical Specification ISO/TS 15926-4:2024(en)
Industrial automation systems and integration — Integration
of life-cycle data for process plants including oil and gas
production facilities —
Part 4:
Core reference data
1 Scope
This document specifies the set of core reference data items which can be used to record information about
process plants, including oil and gas production facilities.
The following are within the scope of this document:
— core classes for process plants, including oil and gas production facilities;
— information about a reference data item.
NOTE The total set of information about a reference data item can be found in Table B.1.
The following are outside the scope of this document:
— data requirements for additional reference data items;
— the procedures to be followed for registration and maintenance of additional reference data items.
2 Normative references
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.
ISO 15926-2:2003, Industrial automation systems and integration — Integration of life-cycle data for process
plants including oil and gas production facilities — Part 2: Data model
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1.1
class
category or division of things based on one or more criteria for inclusion and exclusion
Note 1 to entry: A class need not have any members (things that satisfy its criteria for membership).

Note 2 to entry: Because the spatio-temporal paradigm is used to define individuals in this document, all classes are
non-well-founded sets. These are explained in ISO 15926-2:2003, D.2.4.
[SOURCE: ISO 15926-1:2004, 3.1.1, modified — editorial updates to Note 2 to entry.]
3.1.2
commodity product class
manufactured product class that has sufficient characterization to indicate suitability for a defined use, and
that is an open agreed standard
Note 1 to entry: Often a commodity product class is defined by several other standards. A piping component typically
conforms to a “shape standard” and a “material standard”.
Note 2 to entry: Different manufactured product classes, which are specializations of the same commodity product
class, are interchangeable for the usage defined by the commodity product class.
Note 3 to entry: Adapted from ISO 15926-1:2004, 3.1.2.
EXAMPLE The type of light bulb known as 60 W 230 V E27 is a commodity class.
3.1.3
core class
class that is a commonly used subdivision corresponding to terms used in common language
EXAMPLE Pipe, floor, pump, and light bulb are all core classes.
[SOURCE: ISO 15926-1:2004, 3.1.4, modified — Note 1 to entry was deleted.]
3.1.4
data
representation of information in a formal manner suitable for communication, interpretation, or processing
by human beings or computers
[SOURCE: ISO 10303-2:2024, 3.1.207]
3.1.5
de facto class
class corresponding to common natures that are widely recognized but not formally agreed or defined
Note 1 to entry: De facto classes can be subsequently formalized by international, national, or industry agreement.
Note 2 to entry: A manufacturer can choose to make a product of similar specification to that of another manufacturer
in order to compete for the market share by choosing to conform to some characteristics of the other product.
EXAMPLE USB port and HB pencil are de facto classes.
[SOURCE: ISO 15926-1:2004, 3.1.8, modified — Editorial update to Note 1 to entry, EXAMPLE 1 changed to
Note 2 to entry and updated, EXAMPLE 2 is now EXAMPLE and updated.]
3.1.6
information
facts, concepts, or instructions
EXAMPLE 1 The unique name of a reference data item is information about that reference data item.
EXAMPLE 2 The definition of a reference data item is information about that reference data item.
[SOURCE: ISO 10303-1:2021, 3.1.41, modified — Examples 1 and 2 added.]
3.1.7
manufactured product class
class whose members are individuals produced by a manufacturing process
Note 1 to entry: The members of a manufactured product class can be discrete, or can be batches or continuous flows,
such as process fluids.
Note 2 to entry: A manufactured product class may correspond to a specification that has not been realized, such
product specification for which no products have been made.
EXAMPLE 1 Lightbulbs of type “60 W 230 V E27” is a manufactured product class whose members are discrete.
EXAMPLE 2 "EN 228" unleaded petrol is a manufactured product class whose members are continuous.
[SOURCE: ISO 15926-1:2004, 3.1.14, modified — Editorial update to Note 1 to entry, example updated]
3.1.8
product class
artefact that has been designed by a manufacturer and whose members may fulfil the requirements set
forth in an instance of an asset requirement class
3.1.9
proprietary class
class whose specification for membership is owned, controlled, or protected by an organization and is not
generally available outside that organization
[SOURCE: ISO 15926-1:2004, 3.1.16]
3.1.10
proprietary product class
class that is a manufactured product class and a proprietary class
Note 1 to entry: Proprietary product classes are specializations that depend on rules of inclusion and exclusion some
of which are controlled in a closed way. This means that some aspects of the specification can be arbitrarily changed.
Many proprietary product classes are specializations of commodity product classes, de facto classes, or both, where
the additional restrictions reflect design or manufacturing details that the manufacturer uses to differentiate its
product from others of the same general type.
EXAMPLE 1 A product specification that is owned by a commercial organization, and that is marketed under and
protected by a registered trade name, is the basis for a proprietary product class.
EXAMPLE 2 Lightbulbs of type “60 W 230 V E27” manufactured by Phillips are members of a proprietary product class.
[SOURCE: ISO 15926-1:2004, 3.1.17]
3.1.11
reference data
process plant life-cycle data that represents information about classes or individuals which are common to
many process plants or of interest to many users
[SOURCE: ISO 15926-1:2004, 3.1.18]
3.1.12
reference data item
thing that is defined within a reference data library
Note 1 to entry: Each reference data item is an administered item.
Note 2 to entry: A registration authority can regard a reference data item as an administered item as defined in
ISO/IEC 11179-6.
3.1.13
reference data library
managed collection of reference data items
[SOURCE: ISO 15926-1:2004, 3.1.19, — "items" added to definition.]

3.1.14
reference data library module
collection of reference data items within a reference data library that shares the same subject area
EXAMPLE Electrical is a reference data library module, represented by a specific spreadsheet, which contains
reference data library items (classes) that are of direct interest for the electrical engineering discipline, which in this
case is the subject area. In the context of ISO 15926-2 the reference data library module is a class of class with as
members all classes contained by the corresponding spreadsheet.
3.1.15
standard class
class whose specification for membership is owned or controlled by a standardization body and is publicly
available
Note 1 to entry: Standard classes result from the work of national, international, or industry standardization bodies
and cover sizes, shapes, materials, performance, and manufacturing processes of equipment and materials. The
rules for exclusion and inclusion (or conformance) are agreed by an open, consensus process and are made publicly
available. A standard class need only constrain one particular aspect and can often be insufficient to determine usage
or be a full manufacturing specification.
EXAMPLE 1 ASME B16.9 constrains the dimensions and shapes of steel buttwelding pipe fittings.
EXAMPLE 2 IEC 60079-1 specifies constraints on electrical equipment to ensure standard degrees of explosion-
proofness.
[SOURCE: ISO 15926-1:2004, 3.1.20, modified — Editorial update to Note 1 to entry and EXAMPLES.]
3.2 Abbreviated terms
ID identifier
RDL reference data library
URI uniform resource identifier
4 Reference data library
The background of the principles for having a data model and reference data library is described in
ISO 15926-1.
The version of the reference data library specified by this document consists of the versions of the reference
data library modules listed and described in Annex A, Table A.1.
The normative representations of the versions of the reference data library modules are spreadsheets. These
spreadsheets can be obtained by dereferencing the URI given in Annex C in combination with the contents of
Annex A, Table A.2.
The types of content in the columns of the spreadsheets are described in Table B.1.
This document gives the content of the reference data library modules and its structure. The content itself
is a result of applying the rules as defined in ISO/TS 15926-6. For this reason, ISO/TS 15926-6 is not defined
as normative for this document.
Reference data items in a project RDL can be core classes, standard classes, de facto classes, manufactured
product classes, commodity product classes and proprietary product classes. The terms for these different
types of classes are further explained in Annex D.
The basis for the core classes as defined in the reference data library modules is described in ISO 15926-2.
Each reference data item that is a class shall be directly or indirectly a subclass of an entity in ISO 15926-2.
The core classes as defined reference data library modules can be used by other parts of the ISO 15926 series.

Given that there are several types of libraries and it is not always clear how they relate to each other, Annex E
provides an explanation of the various libraries and their role from the perspective of the ISO 15926 series.
Annex F gives examples of how this document has been applied in the different parts of the ISO 15926 series
supporting life cycle data integration. Based on this, it can be determined how this document can be used on
itself in a private data integration application.

Annex A
(normative)
Reference data library module versions
The spreadsheet representations of the versions of the reference data library modules specified by this
document has engineering disciplines as listed in Table A.1.
A representation of Table A.1 as HTML, with hypertext links to the editions of ISO/TS 15926-4 (this
document) and their spreadsheet versions, can be obtained by dereferencing the URI given in this Annex.
In this edition of this document each reference data library module corresponds with a spreadsheet whose
structure is defined in Annex B.
Table A.1 — Reference data library module versions
Module Version Description of module
Activities, including physical processes carried out within process plants
and engineering activities carried out by people.
ACTIVITY OR EVENT 2
EXAMPLE   AUTOMATIC TESTING, COLD PRESSING
Generic engineering classes which are referenced by other sets, but which
are not specific to an engineering discipline.
EXAMPLE   AIR HANDLER, COMPONENT, ENGINEER
NOTE   ARTEFACT is the top class in MULTI SUBJECT AREA that stands for
MULTI SUBJECT AREA 2
everything given shape by man; the top of the taxonomy for physical class-
es. The FunctionalObject class in ISO15926-2 ENTITY TYPE is the top of the
taxonomy for functional classes. Each physical class has at least these two
parent classes through their taxonomies.
Classifications of classes for information management purposes.
EXAMPLE   ELECTRICAL, CONNECTION MATERIAL
CLASS OF CLASS 2
NOTE   Class of class suitable for standardization are the subject areas of
the spreadsheets. There are many arbitrary classes of class (e.g. bar profile
class) that are not suitable to be used in a standard.
Equipment items and features of equipment items which are involved in
the making of process connections.
CONNECTION MATERIAL 2
EXAMPLE   CLEVIS PIN, LAP WELD JOINT
Electrical equipment items including motors, generators, uninterruptible
power supplies and transmission and distribution equipment.
ELECTRICAL 2
EXAMPLE   AUTO-TRANSFORMER, BUS DUCT
Heat transfer equipment
HEATERS, COOLERS AND
HEAT TRANSFER
EXAMPLE   AIR COOLER, INLET LOUVER, REHEATER
Document types, including documents which specify process plant opera-
INFORMATION AND IN-
tions, and identifier types.
FORMATION CARRIER
EXAMPLE   HAZARD ANALYSIS REPORT, APPROVAL STAMP

TTaabbllee AA.11 ((ccoonnttiinnueuedd))
Module Version Description of module
Equipment items involved in monitoring, communications, recoding and
control.
EXAMPLE   ABSOLUTE PRESSURE GAUGE, DENSITY MEASURING IN-
STRUMENT – MICROWAVE
NOTE   Some instrument classes need to be combined to give the aspects
INSTRUMENTATION 2
to the instance plant item. For example, an instance object must be classi-
fied by DIFFERENTIAL PRESSURE TRANSMITTER and by DIFFERENTIAL
PRESSURE MEASURING ELEMENT – BELLOWS to combine the method
of measuring. There are the taxonomies MEASURING INSTRUMENT and
MEASURING ELEMENT for this.
ISO 15926-2 entities which are super classes of reference data items speci-
fied by this document, or which have reference data items specified by this
ISO 15926-2 ENTITY
document as instances.
TYPE
EXAMPLE   Class of person, person
Missing super classes needed for completeness and consistency from an
integrated point of view over all reference data library modules.
MISSING SUPER CLASSES 1
EXAMPLE   CONCRETE
Pipes and piping components.
PIPING 2
EXAMPLE   SPOOL PIECE, TUBING SPOOL
Physical quantities and physical properties possessed by equipment items.
PROPERTY AND STATUS 2
EXAMPLE   FAULT CORRECTION TIME, GROSS TOTAL WEIGHT
Insulation (thermal and electrical) and safety systems for the protection of
personnel and equipment.
PROTECTION 2
EXAMPLE   FIRE FIGHTING SYSTEM, TRACING SYSTEM
Rotating equipment, including pumps, compressors, expanders and mixers.
EXAMPLE   CENTRIFUGAL PUMP, CRANKSHAFT GEAR
NOTE   There are classes that need to be combined to express if the
ROTATING EQUIPMENT 2
instance object is a system or a bare object. For example, to express a cen-
trifugal pump skid (foundation, pump, gearbox, driver), classify the object
by CENTRIFUGAL PUMP and by PUMP SYSTEM. If it is a bare pump, classify
by CENTRIFUGAL PUMP and by BARE PUMP.
Handling of solid objects, including billets and particulate materials
SOLIDS HANDLING 2
EXAMPLE   CRUSHER, PEBBLE MILL
Static process equipment, excluding heat exchangers, valves and piping.
Within scope are tanks and vessels, reactors, separators, filters and static
STATIC EQUIPMENT 2
mixers.
EXAMPLE   PLUG MILL
Vehicles and associated civil and marine structures and facilities.
TRANSPORT 2
EXAMPLE   HELICOPTER
Units of measure and scales.
UOM (SCALE) 3
EXAMPLE   METRE
Valves (for the control or prevention of fluid flow).
VALVE CLASSES 2
EXAMPLE   CAGE CHOKE VALVE
NOTE The reference data library modules control function and encoded information (both version ‘1’) are taken
out of the original series of data library models since the content has been included in the other spreadsheets.
In Table A.2 the file names of the spreadsheets are given that represent the reference data library modules
that are modified as a result of this edition of ISO/TS 15926-4 (this document).

Table A.2 — File names of the changed and added reference data library modules
Name of reference data library module File name spreadsheet
ACTIVITY OR EVENT activity-v2.xlsx
CLASS OF CLASS class_of_class-v2.xlsx
CONNECTION MATERIAL Connection_material-v2.xlsx
ELECTRICAL electrical-v2.xlsx
HEATERS, COOLERS AND HEAT TRANSFER heaters_coolers_and_heat_transfer-v2.xlsx
INFORMATION AND INFORMATION CARRIER information_and_information_carrier-v2.xlsx
INSTRUMENTATION instrumentation-v2.xlsx
ISO 15926-2 ENTITY TYPE iso15926-2_entity_type-v2.xlsx
MULTI SUBJECT AREA multi_subject_area-v2.xlsx
MISSING SUPER CLASSES missing_superclasses_v1.xlsx
PIPING piping-v2.xlsx
PROPERTY AND STATUS property-v2.xlsx
PROTECTION protection-v2.xlsx
ROTATING EQUIPMENT rotating_equipment-v2.xlsx
SOLIDS HANDLING solids_handling-v2.xlsx
STATIC EQUIPMENT static_equipment-v2.xlsx
TRANSPORT transport-v2.xlsx
VALVE CLASSES valve_classes-v2.xlsx
UOM (SCALE) uom_v3.xlsx
Annex B
(normative)
Columns in the spreadsheets representing the attributes of
ISO/TS 15926-4:20— (this version of this document)
Each version of a reference data library module of the reference data library is represented as a spreadsheet
with one row for each reference data item. The cells in the row contain information about a reference data item.
Table B.1 specifies:
— the attributes of a spreadsheet representation of a reference data library, represented by the name of
each column;
— the order of the columns in the spreadsheet;
— a description of the information in the column;
— the format of the data in the column.
Table B.1 — Attributes of a spreadsheet representation of a reference data library
Attribute
a
Attribute name Attribute description Format
number
A URI of the reference data item
1 URI text
NOTE   The attribute URI is already included as a reservation.
A non-human interpretable identifier of the reference data item
2 UniqueNumber EXAMPLE 1 For the ‘centrifugal pump’, UniqueNumber = 7436. ID
EXAMPLE 2 For the ‘metre per second’, UniqueNumber = 9604.
A human-interpretable identifier of the reference data item
EXAMPLE 1 For the ‘centrifugal pump’, UniqueName = ‘CEN-
3 UniqueName TRIFUGAL PUMP’. text
EXAMPLE 2 For the ‘metre per second’, UniqueName = ‘METRE
PER SECOND’.
A synonym for the human-interpretable identifier of the reference
data item
4 Synonym1 text
EXAMPLE Synonym1 = ‘COOLING APPLIANCE’ where
UniqueName = ‘COOLER.’
A synonym for the human-interpretable identifier of the reference
5 Synonym2 text
data item
The text definition for the reference data item
EXAMPLE 1 For the ‘centrifugal pump’, TextDefinition = ‘A
is an and a
6 TextDefinition in which centrifugal force imparted by the impeller is covered to text
pressure in the volute casing’.
EXAMPLE 2 For the ‘metre per second’, TextDefinition = ‘dm:
Scale’.
The source of the text definition for the reference data item
7 Source text
EXAMPLE 1 For the ‘centrifugal pump’, Source = none.
Notes and other informative text about the reference data item
8 Notes text
EXAMPLE Notes = ‘Chain pumps normally applied to lift water’
where UniqueName = ‘CHAIN PUMP’.

TTaabbllee BB.11 ((ccoonnttiinnueuedd))
Attribute
a
Attribute name Attribute description Format
number
The human-interpretable identifier of a class that is a superclass
EXAMPLE 1 For the ‘centrifugal pump’, Superclass1 = ‘ARTE-
9 Superclass1 FACT’. ID
EXAMPLE 2 For the ‘metre per second’, Superclass 1 = ‘Prop-
ertyQuantification’.
The human-inte
...