ISO 16757-4
(Main)Data structures for electronic product catalogues for building services — Part 4: Data dictionary structures for product catalogues
Data structures for electronic product catalogues for building services — Part 4: Data dictionary structures for product catalogues
The focus of ISO 16757 is the support of manufacturers to provide their product data in electronic product catalogues. The standard - ISO 16757 Part 4: Dictionaries for product catalogues – describes which data structures are required in a dictionary to support the exchange of product data from manufacturers to designers of building services systems. Basis for this specification are the standards ISO 12006-3 and ISO 23386. In the scope of this standard are the following elements: - The definition of roles of ISO 12006-3 subjects that are needed to describe the concepts used in current product catalogue dictionaries. These roles include the following: o Product classes to represent product groups with similar property sets o Blocks that represent reusable and multiply used set of properties o System classes that represent the systems into which a product may be installed and provide the system properties which determine the values of dependent product properties o Port classes that allow the product independent description of different kinds of ports which can be used for the definition of product classes or blocks o Catalogue classes that describe the meta data of a catalogue o Tagging classes that allow the tagging of properties to distinguish property roles in the product description - A requirement model capturing the necessary structures to describe these roles - A mapping to the dictionary model of ISO 12006-3.
Structures de données pour catalogues électroniques de produits pour les services du bâtiment — Partie 4: Structures des dictionnaires de données pour les catalogues de produits
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FINAL DRAFT
International
Standard
ISO/FDIS 16757-4
ISO/TC 59/SC 13
Data structures for electronic
Secretariat: SN
product catalogues for building
Voting begins on:
services —
2025-07-03
Part 4:
Voting terminates on:
2025-08-28
Data dictionary structures for
product catalogues
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ISO/FDIS 16757-4:2025(en) © ISO 2025
FINAL DRAFT
ISO/FDIS 16757-4:2025(en)
International
Standard
ISO/FDIS 16757-4
ISO/TC 59/SC 13
Data structures for electronic
Secretariat: SN
product catalogues for building
Voting begins on:
services —
Part 4:
Voting terminates on:
Data dictionary structures for
product catalogues
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 16757-4:2025(en) © ISO 2025
ii
ISO/FDIS 16757-4:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Modelling of required kinds of data . 3
4.1 General .3
4.2 Overall model .3
4.3 Subject kinds of the overall model .4
4.3.1 Product .4
4.3.2 Catalogue . .5
4.3.3 Block .6
4.3.4 Ports and in/outlets .7
4.4 Relationship types .9
4.4.1 isSubtypeOf .9
4.4.2 hasPart .10
4.4.3 hasBlock .11
4.4.4 isDependentOn .11
4.4.5 isSubkindOf .11
4.5 Property kinds and their representation in the overall model . 12
4.5.1 General . 12
4.5.2 What does a property describe . 12
4.5.3 Representation of the property kinds using the overall model . 13
4.6 Relationship to data templates .14
5 Representation of the overall model by means of ISO 12006-3 .15
5.1 General . 15
5.2 Relationships in ISO 12006-3 . 15
5.2.1 Overview . 15
5.2.2 Property relationships .16
5.2.3 Subject relationships .16
5.3 Dictionary meta level to define subject kinds and relationship types .17
5.4 Kinds of subjects at the dictionary meta level .19
5.5 Subject relationship types at the dictionary meta level . 20
5.6 Property relationships .21
6 Specific rules and recommendations .21
6.1 General .21
6.2 Rules for specific situations .21
6.2.1 Cardinality properties for hasPart and hasBlock relationships .21
6.2.2 References to literature . 22
6.2.3 Positioning in space . 22
6.2.4 Predefined calculation functions for dynamic properties . 22
6.2.5 Relationships to classifications or other dictionaries . 23
6.3 Recommendations for dealing with controlled value lists . 23
6.3.1 Problem description . 23
6.3.2 Property value list with subject contextual filtering . 23
Bibliography .25
iii
ISO/FDIS 16757-4:2025(en)
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 59, Buildings and civil engineering works],
Subcommittee SC 13, Organization and digitization of information about buildings and civil engineering
works, including building information modelling (BIM), in collaboration with the European Committee
for Standardization (CEN) Technical Committee CEN/TC 442, Building Information Modelling (BIM), in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 16757 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
ISO/FDIS 16757-4:2025(en)
Introduction
Building information modelling (BIM) provides a means for describing and displaying information required
throughout the asset life cycle. Increasingly this modelling approach is expanding to encompass all aspects
of the built environment, including civil infrastructure, utilities and public space.
The ISO 16757 series provides the structure of a product catalogue model for data sharing and data excha
...
ISO/FDIS 16757-4:2025(E)
ISO/TC 59/SC 13
Secretariat: SN
Date: 2025-03-1406-19
Data structures for electronic product catalogues for building
services —
Part 4:
Data dictionary structures for product catalogues
FDIS stage
Warning for WDs and CDs
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change
without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
ISO/FDIS 16757-4:2025(en)
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: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii
ISO/FDIS 16757-4:2025(en)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Modelling of required kinds of data . 3
4.1 General . 3
4.2 Overall model . 3
4.3 Subject kinds of the overall model . 5
4.4 Relationship types . 13
4.5 Property kinds and their representation in the overall model . 16
4.6 Relationship to data templates . 20
5 Representation of the overall model by means of ISO 12006-3 . 21
5.1 General . 21
5.2 Relationships in ISO 12006-3 . 21
5.3 Dictionary meta level to define subject kinds and relationship types . 24
5.4 Kinds of subjects at the dictionary meta level . 28
5.5 Subject relationship types at the dictionary meta level . 29
5.6 Property relationships . 30
6 Specific rules and recommendations . 30
6.1 General . 30
6.2 Rules for specific situations . 30
6.3 Recommendations for dealing with controlled value lists . 33
Bibliography . 35
iii
ISO/FDIS 16757-4:2025(en)
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 documentsdocument 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/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 59, Buildings and civil engineering works],
Subcommittee SC 13, Organization and digitization of information about buildings and civil engineering works,
including building information modelling (BIM), in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 442, Building Information Modelling (BIM), in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 16757 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
ISO/FDIS 16757-4:2025(en)
Introduction
Building information modelling (BIM) provides a means for describing and displaying information required
throughout the asset life cycle. Increasingly this modelling approach is expanding to encompass all aspects of
the built environment, including civil infrastructure, utilities and public space.
The ISO 16757 series provides the structure of a product catalogue model for data sharing and data exchange
of product models in product catalogues. It contains specifications for:
— — selection of products from different product classes and product variants;
— — combining product components and accessories to products;
— — geometrical representation in technical systems;
— — connectivity to other products in models of technical systems;
— — calculation of dynamic property values in accordance with the product behaviour in technical systems.
This document outlines the requirements for data dictionaries to support both semantic definitions and data
modelling in product catalogues. ISO 12006-3 defines the underlying data model for related data dictionaries
and serves as the foundation of this document.
Tools are used to define, simulate and operate building services systems (including e.g. HVAC systems and
building automation systems). To build such a system basically means to interconnect different products in a
way that the resulting system fits into the building and works in accordance with the functional requirements.
The products are selected from product catalogues of manufactures or distributors. Important aspects of these
products are their connection points and information on their behaviour in different situations.
The goal of this document is to support the engineering tools by enabling them to identify the relevant
information easily in different data dictionaries. In the area of building services, a few generic concepts are
widely used:
— — dynamic properties describing the behaviour of products in different situations and load cases that
are dependent on external properties describing external conditions;
— — a distinction of data dictionary entries representing products, meta data of catalogues, and specific
features of products like subfunctions or ports.
This document defines common kinds of data dictionary elements that provide a way to identify the basic
structures across data dictionaries.
Besides this document, the ISO 16757 series contains the following documents:
— — ISO 16757-1 describes the fundamental concepts and assumptions about the creation of
manufacturer-related product catalogues as BIM data exchange models. It describes the content of product
catalogues and the mapping of the content to a data format.
This data format provides the opportunity to search and select product data together with accessory data
which can be read into software applications for planning, designing, calculating and simulating as well
as for facility managing.
— — ISO 16757-2 describes the concept of geometry of the building services product data of a product
catalogue in form of 2D symbols and 3D shape models and specifies the required spaces and ports.
v
ISO/FDIS 16757-4:2025(en)
It contains the fundamental concepts and assumptions about the parametric geometry of special products,
used in planning software applications e.g. for air condition systems such as ducts and transitions between
different forms. It also contains a concept for representing products as 3D solid models, which are made
from thin sheet metal.
— — ISO 16757-5 specifies the organisationorganization of product catalogues on the basis of ISO 16739-1
(Industry Foundation Classes, IFC) and EN 17549-2. These product catalogues get the semantics of their
properties from data dictionaries that are described in this document.
It contains an overview about the representation of important elements of product catalogues and gives
detailed specifications of the usage of IFC structures in the product catalogues.
vi
ISO/FDIS 16757-4:2025(en)
Data structures for electronic product catalogues for building services
— —
Part 4:
Data dictionary structures for product catalogues
1 Scope
This document specifies requirements for data dictionaries that are used by product catalogues for building
services to provide the semantics of their definitions and data modelling. For this purpose, it defines an overall
model that contains:
— — subject kinds that allow to distinguish:
— — product subjects representing products in product catalogues;
— — catalogue subjects comprising meta data of product catalogues;
— — various kinds of blocks that collect properties of complex product features, including ports and
in/outlets;
— — relationship types that allow to distinguish between different kinds of relationships like isSubtypeof,
hasPart, or hasBlock;
— — property kinds to distinguish between:
— — static properties describing products by providing property values in product catalogues;
— — dynamic properties that describe the behaviour of products;
— — external properties that represent external conditions that influence the behaviour of the
product by influencing the values of dynamic properties.
This document also describes a mapping of the overall model to the data dictionary model of ISO 12006-3 by
introducing a dictionary meta level.
Finally, to overcome deficiencies of the standards underlying ISO 16757-5 in capturing all aspects of product
catalogues, this document provides some rules and recommendations for required data dictionary elements.
This document does not describe how product catalogues have to be organisedorganized, and it does not
describe any formats for the exchange of product catalogues. Product catalogues are described in ISO 16757-
5.
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 12006--3, Building construction — Organization of information about construction works — Part 3:
Framework for object-oriented information
ISO/FDIS 16757-4:2025(en)
ISO 23386, Building information modelling and oth
...
PROJET FINAL
Norme
internationale
ISO/FDIS 16757-4
ISO/TC 59/SC 13
Structures de données pour
Secrétariat: SN
catalogues électroniques de
Début de vote:
produits pour les services du
2025-07-03
bâtiment —
Vote clos le:
2025-08-28
Partie 4:
Structures des dictionnaires de
données pour les catalogues de
produits
Data structures for electronic product catalogues for building
services —
Part 4: Data dictionary structures for product catalogues
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ISO/FDIS 16757-4:2025(fr) © ISO 2025
PROJET FINAL
ISO/FDIS 16757-4:2025(fr)
Norme
internationale
ISO/FDIS 16757-4
ISO/TC 59/SC 13
Structures de données pour
Secrétariat: SN
catalogues électroniques de
Début de vote:
produits pour les services du
2025-07-03
bâtiment —
Vote clos le:
2025-08-28
Partie 4:
Structures des dictionnaires de
données pour les catalogues de
produits
Data structures for electronic product catalogues for building
services —
Part 4: Data dictionary structures for product catalogues
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INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
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FOURNIR UNE DOCUMENTATION EXPLICATIVE.
DOCUMENT PROTÉGÉ PAR COPYRIGHT
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© ISO 2025 INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
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Publié en Suisse Numéro de référence
ISO/FDIS 16757-4:2025(fr) © ISO 2025
ii
ISO/FDIS 16757-4:2025(fr)
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 2
4 Modélisation des catégories de données requises . 3
4.1 Généralités .3
4.2 Modèle global .3
4.3 Catégories de sujets du modèle global . .5
4.3.1 Produit .5
4.3.2 Catalogue . .6
4.3.3 Bloc .6
4.3.4 Interfaces et entrées/sorties .7
4.4 Types de relations .9
4.4.1 isSubtypeOf .9
4.4.2 hasPart .10
4.4.3 hasBlock .11
4.4.4 isDependentOn .11
4.4.5 isSubkindOf .11
4.5 Catégories de propriétés et leur représentation dans le modèle global . 12
4.5.1 Généralités . 12
4.5.2 Ce que décrit une propriété . 12
4.5.3 Représentation des catégories de propriétés à l’aide du modèle global . 13
4.6 Relation avec les modèles de données . 15
5 Représentation du modèle global au moyen de l’ISO 12006-3 .16
5.1 Généralités .16
5.2 Relations de l’ISO 12006-3 .16
5.2.1 Vue d’ensemble .16
5.2.2 Relations entre propriétés .16
5.2.3 Relations entre sujets . . .16
5.3 Méta-niveau de dictionnaire pour définir des catégories de sujets et des types de
relations .17
5.4 Catégories de sujets au méta-niveau du dictionnaire . 20
5.5 Types de relations entre sujets au méta-niveau du dictionnaire.21
5.6 Relations entre propriétés . 22
6 Règles spécifiques et recommandations .22
6.1 Généralités . 22
6.2 Règles applicables à des situations particulières . 22
6.2.1 Propriétés de cardinalité pour les relations hasPart et hasBlock . 22
6.2.2 Références à la littérature. 23
6.2.3 Positionnement dans l’espace . 23
6.2.4 Fonctions de calcul prédéfinies pour les propriétés dynamiques .24
6.2.5 Relations avec les classifications ou d’autres dictionnaires .24
6.3 Recommandations pour le traitement des listes de valeurs contrôlées .24
6.3.1 Description du problème .24
6.3.2 Liste de valeurs de propriétés avec filtrage contextuel du sujet .24
Bibliographie .26
iii
ISO/FDIS 16757-4:2025(fr)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de
faire partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales
et non gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore
étroitement avec la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation
électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité
de tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait
pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application.
Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent document que des
informations plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à
l’adresse www.iso.org/patents. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié de tels
droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion de
l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 59, Bâtiments et ouvrages de génie civil,
sous-comité SC 13, Organisation et numérisation des informations relatives aux bâtiments et ouvrages de
génie civil, y compris modélisation des informations de la construction (BIM), en collaboration avec le comité
technique CEN/TC 442, Modélisation des informations de la construction (BIM) du Comité européen de
normalisation (
...
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