EN ISO 16757-4:2025

SLOVENSKI STANDARD
oSIST prEN ISO 16757-4:2024
01-junij-2024
Podatkovne strukture digitalnih knjižnic gradnikov stavbnih sistemov - 4. del:
Podatkovni slovarji za kataloge izdelkov (ISO/DIS 16757-4:2024)
Data structures for electronic product catalogues for building services - Part 4: Dictionary
structures for product catalogue (ISO/DIS 16757-4:2024)
Datenstrukturen für elektronische Produktkataloge der Technischen Gebäudeausrüstung
- Teil 4: Datenwörterbücher für Produktkataloge (ISO/DIS 16757-4:2024)
Structures de données pour catalogues électroniques de produits pour les services du
bâtiment - Partie 4: Titre manque (ISO/DIS 16757-4:2024)
Ta slovenski standard je istoveten z: prEN ISO 16757-4
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
91.010.01 Gradbeništvo na splošno Construction industry in
general
oSIST prEN ISO 16757-4:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 16757-4:2024
oSIST prEN ISO 16757-4:2024
DRAFT
International
Standard
ISO/DIS 16757-4
ISO/TC 59/SC 13
Data structures for electronic
Secretariat: SN
product catalogues for building
Voting begins on:
services —
2024-03-20
Part 4:
Voting terminates on:
2024-06-12
Dictionary structures for product
catalogue
ICS: 91.010.01
THIS DOCUMENT IS A DRAFT CIRCULATED
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IS THEREFORE SUBJECT TO CHANGE
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Reference number
ISO/DIS 16757-4:2024(en)
oSIST prEN ISO 16757-4:2024
DRAFT
ISO/DIS 16757-4:2024(en)
International
Standard
ISO/DIS 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:
Dictionary structures for product
catalogue
ICS: 91.010.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
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Published in Switzerland Reference number
ISO/DIS 16757-4:2024(en)
ii
oSIST prEN ISO 16757-4:2024
ISO/DIS 16757-4:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Required kinds of data . 3
4.1 Kinds of properties .3
4.1.1 Model related terms and definitions .3
4.1.2 What does a property describe .4
4.1.3 Categorization of product properties .4
4.1.4 Example .6
4.2 Product Classes and their relationships .7
4.3 Blocks, Ports and Openings .9
4.4 Overview about the elements and their relationships .10
5 Representation of the model by means of EN ISO 12006-3 .11
5.1 Introduction .11
5.2 Relationships in EN ISO 12006-3 .11
5.3 Initial mapping . 12
5.4 Conventions for keeping more semantics . 13
5.4.1 Kinds of subjects. 13
5.4.2 Property relationships .14
Annex A (normative) Definition of generic subjects.16

iii
oSIST prEN ISO 16757-4:2024
ISO/DIS 16757-4:2024(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
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has been established has the right to be represented on that committee. International organizations,
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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 documents should be noted. This document was drafted in accordance with the editorial rules of the
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Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
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This document was prepared by Technical Committee [or Project Committee] ISO/TC [or ISO/PC] ###, [name
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This second/third/… edition cancels and replaces the first/second/… edition (ISO #####:####), which has
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The main changes compared to the previous edition are as follows:
— xxx xxxxxxx xxx xxxx
A list of all parts in the ISO ##### series can be found on the ISO website.

iv
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ISO/DIS 16757-4:2024(en)
Introduction
Building information modelling (BIM) provides a digital technology for describing and displaying
information required in the planning, design, construction and operation of constructed facilities.
Increasingly this modelling approach is expanding to encompass all aspects of the built environment,
including civil infrastructure, utilities and public space.
The standard EN ISO 16757 defines the structure of a product catalogue model for data sharing and data
exchange of product models in catalogues. It contains the definitions for
— Selection of products from different product classes and product variants
— Combining product components and accessory to products
— Geometrical representation in technical systems
— Connectivity to other products in models of technical systems
— Calculation of dynamic property values according to the product behaviour in technical systems
The standard EN ISO 16757 consists of the following standards:
— EN ISO 16757-1:2015 Data structures for electronic building services product catalogues - Concepts,
architecture and model
This standard describes the fundamental concepts and assumptions about the creation of manufacturer-
related product catalogues as BIM data exchange models. It describes the content of catalogues and the
mapping of the content to a data format.
This data format delivers the opportunity to search and select product data together with accessory
data which can be read in into software applications for planning, designing, calculating and simulating
as well as for facility managing.
— EN ISO 16757-2:2017 Data structures for electronic building services product catalogues – Geometry
This standard describes the concept of geometry of the Building Services product data of a catalogue in
form of 2D symbols and 3D shape models and specifies the required spaces and ports.
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. Also it contains a concept for representing products as 3D solid
models, which are made from thin sheet metal.
— EN ISO 16757-4: (E) Data structures for electronic building services product catalogues – Dictionaries
for product catalogues (This Part of the standard)
— EN ISO 16757-5: (E) Data structures for electronic building services product catalogues – Product
catalogue exchange format
v
oSIST prEN ISO 16757-4:2024
oSIST prEN ISO 16757-4:2024
DRAFT International Standard ISO/DIS 16757-4:2024(en)
Data structures for electronic product catalogues for building
services —
Part 4:
Dictionary structures for product catalogue
1 Scope
ISO 12006-3 defines the underlying data model for BIM related dictionaries. This will be the foundation of
this standard.
Engineering 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 according to the functional
requirements. The products are selected from product catalogues of manufactures or distributors.
Important aspects of these products are information on their behaviour in different situations and the
connection points that allow to connect the products and to build the system.
The goal of this standard is to support the engineering tools by enabling them to identify the relevant
information easily in different 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 product classes and specific groups of properties which describe specific aspects of
products (like subfunctions or ports)
This standard defines some common high-level elements and some design patterns which provide a way to
identify these basic structures across dictionaries. This prevents tools from the necessity to be adapted to
each dictionary they have to deal with, and it ensures that basic dictionary elements can be used with the
same semantics across dictionaries.
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.
EN ISO 12006-3, Building construction -- Organization of information about construction works -- Part 3:
Framework for object-oriented information
EN ISO 23386, Building information modelling and other digital processes used in construction: Methodology to
describe, author and maintain properties in interconnected dictionaries
3 Terms and definitions
3.1
property
defined characteristic suitable for the description and differentiation of the objects in a class
[SOURCE: EN ISO 12006-3:2022, 3.5]

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ISO/DIS 16757-4:2024(en)
3.2
independent property
property that is (in the context of the dictionary) independent from other properties
EXAMPLE Length, width, maximal voltage are independent properties.
Note 1 to entry: Whether a property is independent is related to the universe of discourse: Of course, the length of an
object may be seen as dependent on temperature, but this is normally neglected and a normal temperature range is
assumed. In other areas, this may be very relevant and then length would be defined as depending on other properties.
3.3
dependent property
property where the value is derived from other properties’ values
EXAMPLE Volume can be defined as a dependent property: its value depends on the values of properties length,
width, and depth.
Note 1 to entry: Dependent properties do not have values in a catalogue. Rather, the catalogue provides a means to
determine the value of the dependent property on the basis of the values of its parameters. This is done in most cases
by an algorithmic function, a mathematical function, or a table of values.
3.4
parameter
property that determines (in most cases together with other properties) the value of a dependent property
EXAMPLE In the example of volume the properties length, width, and depth are parameters of volume.
3.5
product property
property that describes a product in a catalogue
EXAMPLE In case of a radiator, examples of product properties are length, width, and depth.
Note 1 to entry: Product properties may be dependent properties or independent properties.
3.6
external property
property that describes an aspect that is external to a product but influences the behavior of the product
EXAMPLE In case of a radiator, examples of external properties are temperature of the incoming medium and room
temperature.
Note 1 to entry: External properties do not describe the product itself.
Note 2 to entry: External properties may be dependent properties or independent properties.
Note 3 to entry: External properties may describe aspects of the environment in which a product will be operating
(e.g. room temperature) or aspects of the system into which the product will be integrated (e.g. input pressure).
Note 4 to entry: External properties do not have a value in a catalogue, their value is only available in a simulation
(provided by the simulation system) or in the operation phase (measurements).
3.7
static property
product property which is either independent or does not have an external property as (direct or indirect)
parameter
EXAMPLE In case of a radiator, examples of static properties are length, width and depth as independent properties
and volume as dependent property having only product properties as parameters.
3.8
dynamic property
dependent product property where at least one parameter is an external property
EXAMPLE In case of a radiator, an example of a dynamic property is the temperature of the outgoing medium.

oSIST prEN ISO 16757-4:2024
ISO/DIS 16757-4:2024(en)
3.9
runtime property
property that does not have a value in a catalog, property whose value can only be determined at runtime
Note 1 to entry: Both external properties and dynamic properties are runtime properties.
3.10
opening
an interface of a technical unit to its environment for the transfer of substances, energy or signals
3.11
port
an interface of a technical unit that can be connected to another port for the transfer of substances, signals,
energy or forces
3.12
block, composed property
group of properties corresponding to a feature needing multiple properties to be defined
[SOURCE: ISO 23386:2020(en), 3.14, slightly adapted]
4 Required kinds of data
It is important for data exchange that both provider and recipient have the same understanding of the data
and that the data is provided on a common basis. The goal is to create this common basis in an open, online
data dictionary. In this section the necessary kinds of data for that purpose are examined. A dictionary that
is compliant to this standard has to provide the necessary structures to support these kinds of data.
The focus of this standard is the description of products in a product catalogue. This is in some aspects
a different view than the view of a designed building where the products are installed in systems in the
building. The manufacturer does not know how and where the products will be installed within a specific
system. Nevertheless, to describe the behavior of a product, the manufacturer has to provide information on
how the product reacts on different external conditions and how some “dynamic” properties are influenced
by environmental and system-specific factors.
4.1 Kinds of properties
In this clause different kinds of properties that are relevant for product catalogues are described.
4.1.1 Model related terms and definitions
According to ISO 12006-3 (IFD), properties may be related to other properties. There are two types of
property relationships defined in IFD:
— Dependency relationship
— Specialization relationship
The relationships between properties are modelled in ISO 12006-3 as shown in Figure 1.
Figure 1
In case of a dependency relationship, in this standard the terms dependent property and parameter are used
to describe the roles of properties in such a relationship (see Figure 2 and definitions 3.3 and 3.4).

oSIST prEN ISO 16757-4:2024
ISO/DIS 16757-4:2024(en)
Figure 2
A parameter may be a dependent or an independent property (see Figure 3 and definitions 3.2 and 3.3).
Figure 3
4.1.2 What does a property describe
The purpose of a manufacturer’s catalogue is the provision of information about products which can be
ordered and delivered by the manufacturer. The products are described by properties, and in the following
these properties are called product properties (see definition 3.5).
In many cases, it is necessary to define the behavior of a product. The behavior of a product is dependent on
and has to react on conditions coming from outside of the product. These conditions are given by the system
into which the product is installed (e.g. the temperature of an incoming medium) or by the environment in
which the product operates (e.g. the temperature of the room in which a radiator is installed).
An example of a property describing a behavioral aspect of a product is the temperature of the outgoing
medium of a radiator that depends amongst others of the temperature of the incoming medium and of the
temperature of the room.
As a matter of fact, the manufacturer cannot describe behavioral aspects like the temperature of the
outgoing medium by a single value. Rather for such behavioral aspects it is necessary to give respective
property values with reference to the properties which describe the system state or the environmental
conditions. These properties are called external properties (see definition 3.6).
NOTE The categorizations and property> are orthogonal to each other. That means that both product properties and external properties may be
dependent or independent (see Figure 4).
Figure 4
4.1.3 Categorization of product properties
Now we can split the product properties:
— Static properties: properties with values that are given in the catalogue (e.g. length, width and depth) or
can be determined from given product properties (e.g. volume) (see definition 3.7) and

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— Dynamic properties: properties that depend on product external properties and describe the behavior of
a product under various external conditions (see definition 3.8).
Often, performance definitions of products have to be provided for specifically given external conditions.
EXAMPLE EN 200 defines the minimum flow rate of a washbasin faucet on a type 1 installation as 12 l/min at a
reference pressure of 3 bar.
Even if in such cases for the property (washbasin faucet in the example) an external property is defined
(pressure), this is not a dynamic property. There is no dynamics involved, because the property is not
defined for different conditions. Rather, such a property describes the value for a fixed external situation, it
is a static property. A dynamic property describes the reaction of a product on different external conditions.
Therefore, the minimum flow rate can be defined as a non-dependent property, and the fixed condition is
just mentioned in the definition of the property.
The various kinds of properties are depicted together in Figure 5:
Figure 5
In a catalog, both external properties and dynamic properties shall not have a value. The value of the
external properties can only be given at runtime which may be a simulation or the operation of the real
system with the real products. During a simulation the simulation software computes various states of the
system which can be related to different values of the external properties of a product. By providing them as
input to a function the value of the dynamic property is computed.
Becaus
...