EN ISO 16757-2:2019

Data structures for electronic product catalogues for building services - Part 2: Geometry (ISO 16757-2:2016)

ISO 16757-2:2016 describes the modelling of building services product geometry. The description is optimized for the interchange of product catalogue data and includes
-      shapes for representing the product itself,
-      symbolic shapes for the visualization of the product's function in schematic diagrams,
-      spaces for functional requirements,
-      surfaces for visualization, and
-      ports to represent connectivity between different objects.
The shape and space geometry is expressed as Constructive Solid Geometry (CSG) based on geometric primitives concatenated to boundary representations by Boolean operations. ISO 16757-2:2016 uses the applicable primitives from ISO 10303‑42 and from ISO 16739 and adds primitives which are required for the special geometry of building services products. For symbolic shapes, line elements are also used.
ISO 16757-2:2016 neither describes the inner structure and internal functionality of the product nor the manufacturing information because this is typically not published within a product catalogue.
Building services products can have millions of variant dimensions. To avoid the exchange of millions of geometries, a parametric model is introduced which allows the derivation of variant-specific geometries from the generic model. This is necessary to reduce the data to be exchanged in a catalogue to a manageable size. The parametric model will result in smaller data files, which can be easier transmitted during data exchanges.
The geometry model used does not contain any drawing information such as views, line styles or hatching.

Datenstrukturen für elektronische Produktkataloge der Technischen Gebäudeausrüstung - Teil 2: Geometrie (ISO 16757-2:2016)

Dieser Teil der ISO 16757 beschreibt die Modellierung der Produktgeometrie von Gebäude-Dienstleistungen. Die Beschreibung ist für den Austausch von Produktkatalogdaten optimiert und umfasst:
   Gestaltdaten für die Darstellung des Produkts selbst;
   symbolische Gestaltdaten für die Visualisierung der Funktion des Produkts in schematischen Darstellungen;
   Räume für Funktionsanforderungen;
   Oberflächen für die Visualisierung; und
   Anschlüsse für die Darstellung der Konnektivität zwischen verschiedenen Objekten.
Die Gestalt- und Raumgeometrie wird als konstruktive Festkörpergeometrie (en: Constructive Solid Geometry, CSG) ausgedrückt, die auf mittels boolescher Operationen zu Begrenzungsflächen-Darstellungen (en: Boundary representation, b-rep) verbundenen geometrischen Primitiven basiert. Dieser Teil der ISO 16757 verwendet die anwendbaren Primitive von ISO 10303-42 und ISO 16739 und erweitert diese um Primitive, die für die besondere Geometrie von Produkten der technischen Gebäudeausrüstung erforderlich sind. Für eine symbolische Gestalt werden auch Linienelemente verwendet.
Dieser Teil der ISO 16757 beschreibt weder die innere Struktur des Produktes noch seine Funktion oder die Herstellungsinformationen, weil diese üblicherweise nicht in Produktkatalogen veröffentlicht werden.
Produkte der technischen Gebäudeausrüstung können Millionen von Größenvarianten haben. Um einen Austausch von entsprechend Millionen verschiedener Geometrien zu vermeiden, wird ein parametrisches Modell eingeführt, welches die Ableitung variantenspezifischer Geometrien von einem allgemeinen Modell ermöglicht. Dies ist notwendig, um die im Rahmen eines Kataloges auszutauschenden Daten auf eine überschaubare Größe zu reduzieren. Das angewendete parametrische Modell führt zu kleineren Datendateien, die sich im Rahmen eines Datenaustausches auf einfache Weise übermitteln lassen.
Das angewendete Geometriemodell enthält keine Zeichnungsinformationen wie Ansichten, Linienarten oder Schraffuren.

Structures de données pour catalogues électroniques de produits pour les services du bâtiment - Partie 2: Géométrie (ISO 16757-2:2016)

La présente partie de l'ISO 16757 décrit la modélisation de la géométrie des produits pour les services du bâtiment. La description est optimisée pour l'échange de données de catalogues de produits et inclut:
—          les formes permettant de représenter le produit lui-même;
—          les formes symboliques pour la visualisation de la fonction du produit sous forme de schémas;
—          les espaces pour les exigences fonctionnelles;
—          les surfaces pour la visualisation; et
—          les interfaces pour représenter la connectivité entre différents objets.
La forme et la géométrie spatiale sont exprimées au moyen de la géométrie de construction de solides (CSG) sur la base de primitives géométriques concaténées en représentations de limites au moyen d'opérations booléennes. La présente partie de l'ISO 16757 utilise les primitives applicables tirées de l'ISO 10303-42 et de l'ISO 16739, et ajoute des primitives qui sont exigées pour la géométrie spéciale des produits pour les services du bâtiment. Des éléments linéaires sont également utilisés pour les formes symboliques.
La présente partie de l'ISO 16757 ne décrit pas la structure intérieure et la fonctionnalité interne du produit ni les informations de fabrication, car ces éléments ne sont généralement pas publiés dans un catalogue de produits.
Les produits pour les services du bâtiment peuvent avoir des millions de variantes de dimensions. Pour éviter l'échange de millions de géométries, un modèle paramétrique est introduit pour permettre la dérivation de géométries de variantes spécifiques à partir du modèle générique. Cela est nécessaire pour réduire la quantité de données à échanger dans un catalogue à une taille qu'il est possible de gérer. Le modèle paramétrique créera des fichiers de données de plus petite taille qui peuvent être plus facilement transmis au cours d'échanges de données.
Le modèle géométrique utilisé ne contient aucune information de dessin, comme des vues, des styles de traits ou des hachures.

Podatkovne strukture digitalnih knjižnic gradnikov stavbnih sistemov - 2. del: Geometrija (ISO 16757-2:2016)

Standard ISO 16757-2:2016 opisuje modeliranje geometrije gradnikov stavbnih sistemov. Opis je optimiziran za izmenjavo podatkov knjižice gradnikov in vključuje:
– oblike za predstavljanje samega gradnika,
– simbolične oblike za vizualizacijo funkcijskih in shematskih prikazov gradnikov,
– prostore za funkcionalne zahteve,
– površine za vizualizacijo in
– vrata, ki predstavljajo povezljivost med različnimi objekti.
Geometrija oblike in prostora je izražena kot konstruktivna geometrija trdnih teles (CSG), ki temelji na geometrijskih primitivih, povezanih z mejnimi predstavitvami Boolovih operacij. Standard ISO 16757-2:2016 uporablja ustrezne primitive iz standardov ISO 10303‑42 in ISO 16739 ter dodaja primitive, ki so zahtevani za posebno geometrijo gradnikov stavbnih sistemov. Za simbolične oblike se uporabljajo tudi linijski elementi.
Standard ISO 16757-2:2016 ne opisuje notranje strukture in notranje funkcionalnosti gradnika ter podatkov o proizvodnji, ker to običajno ni objavljeno v knjižici gradnikov.
Gradniki stavbnih sistemov imajo lahko na milijone različnih dimenzij. V izogib izmenjavi več milijonov geometrij je predstavljen parametrični model, ki omogoča izpeljavo variantnih geometrij iz generičnega modela. To je nujno potrebno za zmanjšanje količine podatkov, ki se izmenjuje v katalogu, na obvladljivo velikost. Parametrični model zagotavlja manjše podatkovne datoteke, ki jih je lažje prenašati med izmenjavo podatkov.
Uporabljeni geometrijski model ne vsebuje nobenih podatkov o risbi, kot so pogledi, slogi črt ali črtkanje.

General Information

• Status: Published
• Publication Date: 28-May-2019
• Withdrawal Date: 29-Nov-2019
• ICS: 91.010.01 - Construction industry in general
• Technical Committee: CEN/TC 442 - Building Information Modelling (BIM)
• Drafting Committee: CEN/TC 442 - Building Information Modelling (BIM)
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 29-May-2019
• Due Date: 17-Oct-2019
• Completion Date: 29-May-2019
• Ref Project: SIST EN ISO 16757-2:2019 - Data structures for electronic product catalogues for building services - Part 2: Geometry (ISO 16757-2:2016)

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2019
Podatkovne strukture digitalnih knjižnic gradnikov stavbnih sistemov - 2. del:
Geometrija (ISO 16757-2:2016)
Data structures for electronic product catalogues for building services - Part 2: Geometry
(ISO 16757-2:2016)
Datenstrukturen für elektronische Produktkataloge der Technischen Gebäudeausrüstung
- Teil 2: Geometrie (ISO 16757-2:2016)
Structures de données pour catalogues électroniques de produits pour les services du
bâtiment - Partie 2: Géométrie (ISO 16757-2:2016)
Ta slovenski standard je istoveten z: EN ISO 16757-2:2019
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16757-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 91.010.01
English Version
Data structures for electronic product catalogues for
building services - Part 2: Geometry (ISO 16757-2:2016)
Structures de données pour catalogues électroniques Datenstrukturen für elektronische Produktkataloge
de produits pour les services du bâtiment - Partie 2: der Technischen Gebäudeausrüstung - Teil 2:
Géométrie (ISO 16757-2:2016) Geometrie (ISO 16757-2:2016)
This European Standard was approved by CEN on 19 May 2019.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16757-2:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 16757-2:2016 has been prepared by Technical Committee ISO/TC 59 "Buildings and
civil engineering works” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 16757-2:2019 by Technical Committee CEN/TC 442 “Building Information Modelling
(BIM)” the secretariat of which is held by SN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2019, and conflicting national standards
shall be withdrawn at the latest by November 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
After the finalization of ISO 16757-2 and during the process of its adoption as a European standard,
CEN/TC 442 has started to develop standards about the “level of information need” which include the
“level of geometry”. Throughout the lifecycle of a built asset, e.g. for a building, different levels of
geometric information about the products are needed.
The product catalogue permits information to be exchanged in accordance with the required level of
information need.
The various geometric levels of ISO 16757-2 support the inclusion of products in an information
container according to a required level of geometry.
ISO 16757-2, 6.2, defines methods of providing multiple levels of geometry which, in accordance with
industry experience, should be available in a product catalogue. For a clearer description of detail and
the extent of geometry, users are advised to apply the upcoming standards that are being drafted by
CEN/TC 442 as well:
prEN 17412 Building Information Modelling - Level of Information Need - Concepts and principles
prEN ISO 23386 Building information modelling and other digital processes used in construction -
Methodology to describe, author and maintain properties in interconnected dictionaries
prEN ISO 23387 Building Information Modelling (BIM) - Data templates for construction objects used in
the life cycle of any built asset - Concepts and principles
There are two planned parts of ISO 16757 which are also closely related to current projects of CEN/TC
442:
— Part 4 will describe the use of dictionaries for capturing the properties of products. Part 4 will be
based on ISO 12006-3 and on the European standards EN ISO 23386 and EN ISO 23387 which are
being developed in CEN/TC 442/WG 4.
— Part 5 will describe the catalogue exchange format. This format will be based on the work in
CEN/TC 442/WG 2 to use IFC for the exchange of product data.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 16757-2:2016 has been approved by CEN as EN ISO 16757-2:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 16757-2
First edition
2016-11-15
Data structures for electronic product
catalogues for building services —
Part 2:
Geometry
Structures de données pour catalogues électroniques de produits pour
les services du bâtiment —
Partie 2: Géométrie
Reference number
ISO 16757-2:2016(E)
©
ISO 2016
ISO 16757-2:2016(E)
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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.
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ii © ISO 2016 – All rights reserved

ISO 16757-2:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Catalogue structure and catalogue information . 2
5 Geometry . 4
5.1 Shapes . 6
5.2 Symbolic shapes . 6
5.3 Space data. 6
5.3.1 Overall space . 6
5.3.2 Minimum operation space . 7
5.3.3 Access space . 7
5.3.4 Placement and transportation space. 7
5.3.5 Installation space. 7
5.4 Surfaces . 7
5.5 Ports . 7
6 Methodology of geometric description . 8
6.1 Principle of geometric representation . 8
6.2 Level of detail . 8
6.3 Surfaces .10
6.4 Ports .12
6.5 Generation of parameter values for the geometry .13
7 Geometry elements .15
7.1 CSG form primitives .18
7.2 CSG sheet metal primitives .18
7.3 Expanded CSG primitives .19
7.4 Mapping of ISO 16757 geometry to parametrizable STEP and IFC geometry .19
Annex A (normative) Additional geometry elements .23
Bibliography .82
ISO 16757-2:2016(E)
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
...