ISO/FDIS 16792

Technical product documentation -- Digital product definition data practices

Documentation technique de produits -- Pratiques pour les données numériques de la définition d’un produit

Standards Content (sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 16792
ISO/TC 10
Technical product documentation —
Secretariat: SIS
Digital product definition data
Voting begins on:
2020­12­24 practices
Voting terminates on:
Documentation technique de produits — Données de définition d'un
2021­02­18
produit
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.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 16792:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 16792:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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
CH­1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 16792:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................vi

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

3.1 General terms and definitions ................................................................................................................................................... 2

3.2 Classification codes for drawings and data sets (see Annex B) .................................................................... 2

4 Data set identification and control .................................................................................................................................................... 3

4.1 General ........................................................................................................................................................................................................... 3

4.2 Related data ............................................................................................................................................................................................... 4

4.3 Data management ................................................................................................................................................................................ 4

5 Data set requirements .................................................................................................................................................................................... 6

5.1 General ........................................................................................................................................................................................................... 6

5.1.1 Introduction ......................................................................................................................................................................... 6

5.1.2 Fundamental requirements .................................................................................................................................... 6

5.1.3 Design model requirement (classification codes 3, 4 and 5)..................................................... 8

5.2 General model requirements ...................................................................................................................................................... 8

5.2.1 Associativity ......................................................................................................................................................................... 8

5.2.2 Model coordinate systems ....................................................................................................................................... 9

5.2.3 Applications of supplemental geometry ..................................................................................................10

5.2.4 Part features not fully modelled ......................................................................................................................10

5.3 General method requirements ...............................................................................................................................................10

5.3.1 Data set methods ..........................................................................................................................................................10

5.3.2 Model-only method ....................................................................................................................................................10

5.3.3 Model and drawing method ................................................................................................................................10

5.4 Management data ..............................................................................................................................................................................11

5.4.1 General...................................................................................................................................................................................11

5.4.2 Management data in the data set ....................................................................................................................11

5.4.3 Management data on a model ...........................................................................................................................11

5.5 Protection marking ..........................................................................................................................................................................12

5.5.1 General...................................................................................................................................................................................12

5.5.2 Location on models.....................................................................................................................................................12

5.6 Saved views on models .................................................................................................................................................................12

5.6.1 General...................................................................................................................................................................................12

5.6.2 Sections .................................................................................................................................................................................12

6 Design model requirements ..................................................................................................................................................................14

6.1 General ........................................................................................................................................................................................................14

6.2 Geometric scale, units and precision ................................................................................................................................15

6.3 Model completeness ........................................................................................................................................................................15

6.4 Assembly model completeness ..............................................................................................................................................16

6.5 Part reference numbers ................................................................................................................................................................16

6.6 Identification method ....................................................................................................................................................................17

6.6.1 General...................................................................................................................................................................................17

6.6.2 Colour .....................................................................................................................................................................................17

6.6.3 Greyscale ..............................................................................................................................................................................17

6.6.4 Mapping ................................................................................................................................................................................17

6.6.5 Transparency ...................................................................................................................................................................18

6.7 Installation model completeness .........................................................................................................................................18

7 Common requirements for product definition data .....................................................................................................19

7.1 General ........................................................................................................................................................................................................19

7.2 Common requirements .................................................................................................................................................................19

7.2.1 Display management .................................................................................................................................................19

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ISO/FDIS 16792:2020(E)

7.3 Model requirements ........................................................................................................................................................................21

7.3.1 General...................................................................................................................................................................................21

7.3.2 Associativity ......................................................................................................................................................................22

7.3.3 Attributes ............................................................................................................................................................................24

7.3.4 Annotation planes ........................................................................................................................................................25

7.3.5 Leader lines .......................................................................................................................................................................26

7.3.6 Direction-dependent specifications .............................................................................................................27

7.3.7 Indicating of restricted area ................................................................................................................................27

7.3.8 Query types........................................................................................................................................................................28

7.4 Drawing requirements ..................................................................................................................................................................33

7.4.1 General...................................................................................................................................................................................33

7.4.2 Orthographic views ....................................................................................................................................................36

7.4.3 Axonometric views .....................................................................................................................................................36

8 Notes and special notations ...................................................................................................................................................................38

8.1 Common requirements .................................................................................................................................................................38

8.2 Model requirements ........................................................................................................................................................................38

8.3 Drawing requirements ..................................................................................................................................................................39

9 Model values and dimensions .............................................................................................................................................................39

9.1 General ........................................................................................................................................................................................................39

9.2 Common requirements .................................................................................................................................................................39

9.2.1 Model value queries ...................................................................................................................................................39

9.2.2 Resolved dimensions ........................................................................................................................................... ......39

9.3 Model requirements ........................................................................................................................................................................40

9.3.1 General...................................................................................................................................................................................40

9.3.2 Theoretically exact dimensions .......................................................................................................................40

9.3.3 Size values ..........................................................................................................................................................................41

9.3.4 Examples of general applications ...................................................................................................................42

9.3.5 Chamfers ..............................................................................................................................................................................42

9.3.6 Depth specification .....................................................................................................................................................45

9.4 Drawing requirements for axonometric views ........................................................................................................48

10 Datum applications .........................................................................................................................................................................................48

10.1 General ........................................................................................................................................................................................................48

10.2 Model requirements ........................................................................................................................................................................48

10.2.1 Datum systems and model coordinate systems .................................................................................48

10.2.2 Identification of datums .........................................................................................................................................50

10.2.3 Associativity of datum features and design data ..............................................................................53

10.2.4 Datum target identification and attachment ........................................................................................53

10.2.5 Multiple features establishing a datum .....................................................................................................55

10.3 Drawing requirements ..................................................................................................................................................................60

11 Geometric tolerances ....................................................................................................................................................................................61

11.1 General ........................................................................................................................................................................................................61

11.2 Drawing requirements ..................................................................................................................................................................61

11.2.1 General...................................................................................................................................................................................61

12 Welds .............................................................................................................................................................................................................................62

12.1 General ........................................................................................................................................................................................................62

12.2 Common requirements .................................................................................................................................................................62

12.2.1 Application of supplemental geometry .....................................................................................................62

12.2.2 Arrow lines.........................................................................................................................................................................62

12.3 Model requirements ........................................................................................................................................................................63

12.3.1 Annotation plane ..........................................................................................................................................................63

12.3.2 Associativity ......................................................................................................................................................................63

12.3.3 Indicating extents of the weld ...........................................................................................................................63

12.3.4 Query of weld path ......................................................................................................................................................65

12.4 Drawing requirements ..................................................................................................................................................................66

13 Surface texture .....................................................................................................................................................................................................66

iv © ISO 2020 – All rights reserved
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ISO/FDIS 16792:2020(E)

13.1 General ........................................................................................................................................................................................................66

13.2 Common requirements .................................................................................................................................................................66

13.3 Model requirements ........................................................................................................................................................................66

13.3.1 Display techniques ......................................................................................................................................................66

13.3.2 Associativity ......................................................................................................................................................................66

Annex A (informative) Former practices .......................................................................................................................................................67

Annex B (informative) Classification codes for drawings and data sets .......................................................................69

Annex C (informative) Examples ............................................................................................................................................................................71

Bibliography .............................................................................................................................................................................................................................76

© ISO 2020 – All rights reserved v
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ISO/FDIS 16792:2020(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 non­governmental, 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 documents 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).

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 patent declarations received (see www .iso .org/ patents).

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 10, Technical product documentation.

This third edition cancels and replaces the second edition (ISO 16792:2015), which has been technically

revised.
The main changes to the previous edition are as follows:
— information on assembly part identification added;
— information on movable parts in assemblies added;
— figures updated to reflect current International Standards,
— content which is authored in other documents removed;
— former practices moved to Annex A;
— Annex C with additional examples of applying this document added.

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.
vi © ISO 2020 – All rights reserved
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ISO/FDIS 16792:2020(E)
Introduction

Every effort was made during the preparation of this document, adapted from ASME Y14.41:2012, to

apply existing requirements developed for two-dimensional (2D) presentation equally to the output

from three-dimensional (3D) models. Where new geometrical product specification (GPS) rules have

proved essential, these have been drafted with a view to their being equally applicable to both 2D

and 3D. Therefore, in order to maintain the integrity of a single system, these new rules are being

incorporated in the relevant existing International Standards for cross-reference. Application examples

have been included where, due to the specific requirements of 3D modelling in support of model-based

definition (MBD), additional guidance was deemed beneficial.

It is recognized that there is a need to support drawings in conjunction with 3D models now and for

the foreseeable future. This need has been addressed in this document through the definition of the

two methods for documenting digital models and specification of requirements to ensure that the

information in a data set is consistent between the model and the drawing.

The figures in this document are intended only as illustrations to aid the user in understanding the

practices elaborated in the text. In some cases, figures show a level of detail as needed for emphasis; in

others, they are only complete enough to illustrate a concept or facet thereof, including the associativity

of annotations in the design model. The absence of figures has no bearing on the applicability of the

specified requirement or practice.

Most figures are illustrations of models in a 3D environment. Figures illustrating drawings in digital

format include a drawing sheet border.

This document describes general requirements and practices for digital product definition applied for 3D

mechanical engineering (MCAD) but which can be also applied to other disciplines and trades (e.g. ECAD).

For former practices, see Annex A.
© ISO 2020 – All rights reserved vii
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 16792:2020(E)
Technical product documentation — Digital product
definition data practices
1 Scope

This document specifies requirements for the preparation, revision and presentation of digital product

definition data, hereafter referred to as data sets, complementing existing standards. It supports two

methods of application: 3D model-only and 3D model with 2D drawing in digital format. The structure

of this document presents requirements common to both methods followed by clauses providing for any

essential, differing requirements for each method. Additionally, its use in conjunction with computer-

aided design (CAD) systems can assist in the progression towards improved modelling and annotation

practices for CAD and engineering disciplines, as well as serving as a guideline for CAx software

developers

The actual definitions for the interpretation, in particular the ISO TPD and ISO GPS rules, are taken

from the original definition standards, e.g. ISO 129-1 and ISO 1101.

When the term model is used in this document it applies to both design models and annotated models.

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
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 16792
ISO/TC 10 Secretariat: SIS
Voting begins on: Voting terminates on:
2020-02-19 2020-05-13
Technical product documentation — Digital product
definition data practices
Documentation technique de produits — Données de définition d'un produit
ICS: 35.240.10; 01.110
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 16792:2020(E)
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 2020
---------------------- Page: 1 ----------------------
ISO/DIS 16792:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 16792:2020(E)
Contents Page

Foreword ...........................................................................................................................................................................5

Introduction .....................................................................................................................................................................6

Scope ....................................................................................................................................................................1

Normative references ....................................................................................................................................1

Terms and definitions ....................................................................................................................................2

3.1 General terms and definitions ....................................................................................................................2

3.2 Classification codes for drawings and data sets (see Annex A) ......................................................4

Data set identification and control ............................................................................................................6

4.1 General ................................................................................................................................................................6

4.2 Related data .......................................................................................................................................................6

4.3 Data management ............................................................................................................................................6

Data set requirements ...................................................................................................................................8

5.1 General ................................................................................................................................................................8

5.2 General model requirements ................................................................................................................... 11

5.3 General method requirements ................................................................................................................ 12

5.4 Management data ......................................................................................................................................... 14

5.5 Protection marking ...................................................................................................................................... 15

5.6 Views on models............................................................................................................................................ 15

Design model requirements ..................................................................................................................... 18

6.1 General ............................................................................................................................................................. 18

6.2 Geometric scale, units and precision ..................................................................................................... 18

6.3 Model completeness .................................................................................................................................... 18

6.4 Assembly model completeness ................................................................................................................ 19

6.5 Part Reference Numbers ............................................................................................................................ 20

6.6 Identification Method .................................................................................................................................. 21

6.7 Installation model completeness ............................................................................................................ 21

6.8 Close Proximity Portion ............................................................................................................................. 22

Common requirements for product definition data ........................................................................ 23

7.1 General ............................................................................................................................................................. 23

7.2 Common requirements ............................................................................................................................... 23

7.3 Model requirements .................................................................................................................................... 26

7.4 Drawing requirements ............................................................................................................................... 41

Notes and special notations ...................................................................................................................... 46

8.1 Common requirements ............................................................................................................................... 46

8.2 Model requirements .................................................................................................................................... 46

8.3 Drawing requirements ............................................................................................................................... 47

Model values and dimensions .................................................................................................................. 47

9.1 General ............................................................................................................................................................. 47

9.2 Common requirements ............................................................................................................................... 47

9.3 Model requirements .................................................................................................................................... 49

9.4 Drawing requirements for axonometric views .................................................................................. 59

Datum applications ...................................................................................................................................... 60

10.1 General ............................................................................................................................................................. 60

10.2 Model requirements .................................................................................................................................... 60

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ISO/DIS 16792:2020(E)

10.3 Drawing requirements ............................................................................................................................... 73

Geometric tolerances .................................................................................................................................. 74

11.1 General ............................................................................................................................................................. 74

11.2 Common requirements .............................................................................................................................. 74

11.3 Model requirements .................................................................................................................................... 74

11.4 Drawing requirements ............................................................................................................................. 109

Welds .............................................................................................................................................................. 115

12.1 General ........................................................................................................................................................... 115

12.2 Common requirements ............................................................................................................................ 118

12.3 Drawing requirements ............................................................................................................................. 122

12.4 Model requirements .................................................................................................................................. 123

Surface texture ............................................................................................................................................ 131

13.1 General ........................................................................................................................................................... 131

13.2 Common requirements ............................................................................................................................ 131

13.3 Model requirements .................................................................................................................................. 131

(informative) Classification codes for drawings and data sets ............................................... 136

A.1 General ........................................................................................................................................................... 136

A.2 Application ................................................................................................................................................... 136

A.3 Definitions .................................................................................................................................................... 136

A.4 Classification code requirements ......................................................................................................... 136

A.4.1 General ........................................................................................................................................................... 136

A.4.2 Classification code location .................................................................................................................... 136

A.4.3 Classification code 1 .................................................................................................................................. 136

A.4.4 Classification code 2 .................................................................................................................................. 137

A.4.5 Classification code 3 .................................................................................................................................. 137

A.4.6 Classification code 4 .................................................................................................................................. 137

A.4.7 Classification code 5 .................................................................................................................................. 137

(informative) Former Practices ......................................................................................................... 138

B.1 General ........................................................................................................................................................... 138

B.2 Applications of supplemental geometry ............................................................................................ 138

B.3 Direction-dependent tolerances........................................................................................................... 138

B.4 Orientation tolerances ............................................................................................................................. 141

Bibliography ............................................................................................................................................................... 143

iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/DIS 16792:2020(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.

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 ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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 patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO's adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 10, Technical product documentation. This third

edition cancels and replaces the second edition (ISO 167925:2015), which has been technically revised.

© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/DIS 16792:2020(E)
Introduction

Every effort was made during the preparation of this International Standard, adapted from

ASME Y14.41:2012, to apply existing requirements developed for two-dimensional (2D) presentation

equally to the output from three-dimensional (3D) models. Where new geometrical product specification

(GPS) rules have proved essential, these have been drafted with a view to their being equally applicable

to both 2D and 3D. Therefore, in order to maintain the integrity of a single system, these new rules are

being incorporated in the relevant existing ISO standards for cross-reference. Application examples have

been included where, due to the specific requirements of 3D modelling, in support of model based

definition (MBD) and product and manufacturing information (PMI) initiatives, additional guidance was

deemed beneficial.

It is recognized that there is a need to support drawings in conjunction with 3D models now and for the

foreseeable future. This need has been addressed in this International Standard through the definition of

the two methods for documenting digital models and specification of requirements to ensure that the

information in a data set is consistent between the model and the drawing.

The figures in this International Standard are intended only as illustrations to aid the user in

understanding the practices elaborated in the text. In some cases, figures show a level of detail as needed

for emphasis; in others, they are only complete enough to illustrate a concept or facet thereof, including

the associativity of annotations in the design model. The absence of figures has no bearing on the

applicability of the specified requirement or practice.

In order to comply with the requirements of this International Standard, actual data sets shall meet the

content requirements set forth in its text.

Most figures are illustrations of models in a 3D environment. Figures illustrating drawings in digital

format include a drawing sheet border.
vi © ISO 2020 – All rights reserved
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DRAFT INTERNATIONAL STANDARD ISO/DIS 16792:2020(E)
Technical product documentation — Digital product definition
data practices
Scope

This International Standard specifies requirements for the preparation, revision, and presentation of

digital product definition data, hereafter referred to as data sets. It supports two methods of application:

model-only and model and drawing in digital format. Its structure presents requirements common to

both methods followed by clauses providing for any essential, differing requirements for each method.

Additionally, its use in conjunction with computer-aided design (CAD) systems could assist in the

progression towards improved modelling and annotation practices for CAD and engineering disciplines,

as well as serving as a guideline for IT engineers.

When the term model is used in this standard it applies to both design models and annotated models.

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.
ISO 128 (all parts), Technical drawings — General principles of presentation

ISO 129-1, Technical drawings — Presentation of dimensions and tolerances — Part 1: General principles

ISO 286 (all parts), Geometrical product specifications (GPS) — ISO code system for tolerances on linear

sizes

ISO 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,

orientation, location and run-out

ISO 1302, Geometrical Product Specifications (GPS) — Indication of surface texture in technical product

documentation

ISO 2553, Welding and allied processes — Symbolic representation on drawings — Welded joints

ISO 2692, Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material

requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)

ISO 3098-0, Technical product documentation — Lettering — Part 0: General requirements

© ISO 2020 – All rights reserved 1
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ISO/DIS 16792:2020(E)

ISO 3098-5, Technical product documentation — Lettering — Part 5: CAD lettering of the Latin alphabet,

numerals and marks
ISO 5456 (all parts), Technical drawings — Projection methods
ISO 5457, Technical product documentation — Sizes and layout of drawing sheets

ISO 5459, Geometrical product specifications (GPS) — Geometrical tolerancing — Datums and datum

systems

ISO 7200:, Technical product documentation — Data fields in title blocks and document headers

ISO 10209, Technical product documentation — Vocabulary — Terms relating to technical drawings,

product definition and related documentation
ISO 11442, Technical product documentation — Document management

ISO 14405-1, Geometrical product specifications (GPS) – Dimensional tolerancing – Part 1: Linear sizes

ISO 14405-2, Geometrical product specifications (GPS) — Dimensional tolerancing — Part 2: Dimensions

other than linear sizes

ISO 16016, Technical product documentation — Protection notices for restricting the use of documents and

products

ISO 17450-1, Geometrical product specifications (GPS) — General concepts — Part 1: Model for

geometrical specification and verification
ISO 80000-1, Quantities and units — Part 1: General

IEC 82045-2, Document management — Part 2: Metadata elements and information reference model

Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 10209 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 General terms and definitions
3.1.1
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ISO/DIS 16792:2020(E)
absolute coordinate system

primary model coordinate system in the active CAD model used to define the location of digital elements

in that CAD model
Note 1 to entry: The active CAD model may be a part, subassembly or assembly.
3.1.2
annotated model

a combination of design model, annotation, and attributes that describe a product.

Note 1 to entry: This definition had a prior title of Model
3.1.3
datum system

set of two or more situation features established in a specific order from two or more datum features

Note 1 to entry: To define a datum system, it is necessary to consider the collection surface created by the considered

datum features. The invariance class of a collection surface can be complex, prismatic, helical, cylindrical, revolute,

planar, or spherical (see ISO 5459:2011, Table B.1).
[SOURCE: ISO 5459:2011, 3.10]
3.1.4
design model
portion of the data set that contains model and supplemental geometry
3.1.5
user defined coordinate system

model coordinate system which is created in the CAD model in addition to the absolute coordinate system

3.1.6
digital element

geometric element, model feature, group of model features, annotation, associated group or attribute that

exists in a data set
[SOURCE: ISO 10209:2012, 9.9]
3.1.7
model based definition (MBD)

an annotated model and its associated data elements that define the product in a manner that can be used

effectively without a drawing graphic sheet.
© ISO 2020 – All rights reserved 3
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ISO/DIS 16792:2020(E)
3.1.8
offset section

stepped cutting plane to include features not located in a straight cutting plane

Note 1 to entry: 2D offset section views are drawn as if the offsets were in one plane, and the offsets are not indicated

in any manner in the section views. 3D offset section views are shown by cutting through the part in an offset

manner.
3.1.9
product and manufacturing information (PMI) (semantic)

annotations and attributes that are associated with a 3D solid model and its geometry features, is

software interpretable, and can be displayed for human interpretation
3.1.10
revolved section

When features have an angular change in direction from the cutting plane which is not more than than

90 degrees, a section of the feature can be rotated in the relevant view as if the bent cutting plane and

features were rotated into a plane perpendicular to the line of sight of the section view.

Note 1 to entry: The rotational direction of the section in the view is unknown.

3.1.11
simplified 3D weld model

Weld shapes such as fillet welding, flare welding, plug welding, etc. modelled in a simplified form

Note 1 to entry: The molten area is not modelled on simplified 3D weld models.
3.1.12
simplified drawing

a drawing with minimal views and dimensional characteristics that relies on the model to provide

complete part definition.
3.1.13
spot locating symbol

A symbol utilized when indicating the position of welding points for spot welding on the integral feature

(on the surface).
Note 1 to entry: Spot locating symbols are handled as supplemental geometry
3.2 Classification codes for drawings and data sets (see Annex A)
3.2.1
classification code
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ISO/DIS 16792:2020(E)

designation assigned to product definition data that defines what data are included within the drawing,

data set, or both
Note 1 to entry: A drawing can either be in physical or electronic format.
3.2.2
classification code 1
drawing with optional data set

Note 1 to entry: Classification code 1 identifies that the data elements are located on the drawing and the drawing

is the original.
3.2.3
classification code 2
data set with design model and drawing

Note 1 to entry: Classification code 2 identifies that data elements are located on a drawing and the drawing is the

original. A computer is used as a tool to prepare the drawing graphics sheet and the model. Data elements are

located in the digital data and the drawing. The model when provided is supplementary to the drawing.

3.2.4
classification code 3
data set with design model or annotated model and simplified drawing

Note 1 to entry: Classification code 3 identifies a model with a simplified drawing used to expedite communication

of common part features and to define non-geometric part definitions. The data set is the original. E.g. The model

and the drawing must be used together to satisfy this requirement.

Note 2 entry: When used annotated models under classification code 3 are partially annotated.

3.2.5
classification code 4
data set with annotated model and drawing

Note 1 to entry: Classification code 4 identifies that all data elements are located in both the digital data and the

drawing. The data set is the original. E.g. The model or the drawing can be used individually to satisfy this

requirement.
3.2.6
classification code 5
data set with annotated model

Note 1 to entry: Classification code 5 identifies that all data elements are located in the data set with model. No

drawing exists.
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ISO/DIS 16792:2020(E)
Data set identification and control
4.1 General

Data sets for which compliance with this International Standard is claimed shall include a reference to

this International Standard, ISO 16792, either in the data set itself or in a document referenced by the

data set. Refer to clause 5.4.3.

The current revision of the data and the computer application(s) and version(s) used to develop the data

set shall be specified with other management data (see 5.4).

The data set identifier shall be unique and shall consist of numeric, alphabetic, or special characters in

any combination. Spaces are not permitted between any of the characters of the data set identifier.

The length of the data set identifier may be a direct function of the computer system and the operating

system. When the part or identifying number is used as the data set identifier, the length shall be

compatible with recognized limitations on number length in accordance with ISO 7200 and IEC 82045-2.

Special characters, such as hyphen (-), slash (/), or asterisk (*), shall be selected in a manner that does

not hinder data set identification or have an adverse effect on the computer system operation.

A recognizable prefix or suffix may be included as part of the identifier to associate files and sets of related

data.

The classification codes given in the informative Annex A can be used to identify the content of the data

sets and define the hierarchal relationships when applicable.
4.2 Related data

Related data shall be integral to, or referenced in, the data set. Related data consists of, but is not limited

to, analytical data, parts lists, test requirements, material specifications, process, and finish requirements

in accordance with Figure 1 .
4.3 Data management

The following specifies the structure and control requirements for data management:

a) The data management system
...