ISO 16792:2021
Technical product documentation — Digital product definition data practices
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.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 General terms and definitions
3.2 Classification codes for drawings and data sets (see Annex B)
4 Data set identification and control
4.1 General
4.2 Related data
4.3 Data management
5 Data set requirements
5.1 General
5.1.1 Introduction
5.1.2 Fundamental requirements
5.1.3 Design model requirement (classification codes 3, 4 and 5)
5.2 General model requirements
5.2.1 Associativity
5.2.2 Model coordinate systems
5.2.3 Applications of supplemental geometry
5.2.4 Part features not fully modelled
5.3 General method requirements
5.3.1 Data set methods
5.3.2 Model-only method
5.3.3 Model and drawing method
5.4 Management data
5.4.1 General
5.4.2 Management data in the data set
5.4.3 Management data on a model
5.5 Protection marking
5.5.1 General
5.5.2 Location on models
5.6 Saved views on models
5.6.1 General
5.6.2 Sections
6 Design model requirements
6.1 General
6.2 Geometric scale, units and precision
6.3 Model completeness
6.4 Assembly model completeness
6.5 Part reference numbers
6.6 Identification method
6.6.1 General
6.6.2 Colour
6.6.3 Greyscale
6.6.4 Mapping
6.6.5 Transparency
6.7 Installation model completeness
7 Common requirements for product definition data
7.1 General
7.2 Common requirements
7.3 Model requirements
7.3.1 General
7.3.2 Associativity
7.3.3 Attributes
7.3.4 Annotation planes
7.3.5 Leader lines
7.3.6 Direction-dependent specifications
7.3.7 Indicating of restricted area
7.3.8 Query types
7.4 Drawing requirements
7.4.1 General
7.4.2 Orthographic views
7.4.3 Axonometric views
8 Notes and special notations
8.1 Common requirements
8.2 Model requirements
8.3 Drawing requirements
9 Model values and dimensions
9.1 General
9.2 Common requirements
9.2.1 Model value queries
9.2.2 Resolved dimensions
9.3 Model requirements
9.3.1 General
9.3.2 Theoretically exact dimensions (TEDs)
9.3.3 Size values
9.3.4 Examples of general applications
9.3.5 Chamfers
9.3.6 Depth specification
9.4 Drawing requirements for axonometric views
10 Datum applications
10.1 General
10.2 Model requirements
10.2.1 Datum systems and model coordinate systems
10.2.2 Identification of datums
10.2.3 Identification of restricted area application
10.2.4 Associativity of datum features and design data
10.2.5 Datum target identification and attachment
10.2.6 Multiple features establishing a datum
10.3 Drawing requirements
11 Geometric tolerances
11.1 General
11.2 Drawing requirements
11.2.1 General
12 Welds
12.1 General
12.2 Common requirements
12.2.1 Application of supplemental geometry
12.2.2 Arrow lines
12.3 Model requirements
12.3.1 Annotation plane
12.3.2 Associativity
12.3.3 Indicating extents of the weld
12.3.4 Query of weld path
12.4 Drawing requirements
13 Surface texture
13.1 General
13.2 Common requirements
13.3 Model requirements
13.3.1 Display techniques
13.3.2 Associativity
Annex A (informative) Former practices
Annex B (informative) Classification codes for drawings and data sets
Annex C (informative) Examples
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 General terms and definitions
3.2 Classification codes for drawings and data sets (see Annex B)
4 Data set identification and control
4.1 General
4.2 Related data
4.3 Data management
5 Data set requirements
5.1 General
5.1.1 Introduction
5.1.2 Fundamental requirements
5.1.3 Design model requirement (classification codes 3, 4 and 5)
5.2 General model requirements
5.2.1 Associativity
5.2.2 Model coordinate systems
5.2.3 Applications of supplemental geometry
5.2.4 Part features not fully modelled
5.3 General method requirements
5.3.1 Data set methods
5.3.2 Model-only method
5.3.3 Model and drawing method
5.4 Management data
5.4.1 General
5.4.2 Management data in the data set
5.4.3 Management data on a model
5.5 Protection marking
5.5.1 General
5.5.2 Location on models
5.6 Saved views on models
5.6.1 General
5.6.2 Sections
6 Design model requirements
6.1 General
6.2 Geometric scale, units and precision
6.3 Model completeness
6.4 Assembly model completeness
6.5 Part reference numbers
6.6 Identification method
6.6.1 General
6.6.2 Colour
6.6.3 Greyscale
6.6.4 Mapping
6.6.5 Transparency
6.7 Installation model completeness
7 Common requirements for product definition data
7.1 General
7.2 Common requirements
7.3 Model requirements
7.3.1 General
7.3.2 Associativity
7.3.3 Attributes
7.3.4 Annotation planes
7.3.5 Leader lines
7.3.6 Direction-dependent specifications
7.3.7 Indicating of restricted area
7.3.8 Query types
7.4 Drawing requirements
7.4.1 General
7.4.2 Orthographic views
7.4.3 Axonometric views
8 Notes and special notations
8.1 Common requirements
8.2 Model requirements
8.3 Drawing requirements
9 Model values and dimensions
9.1 General
9.2 Common requirements
9.2.1 Model value queries
9.2.2 Resolved dimensions
9.3 Model requirements
9.3.1 General
9.3.2 Theoretically exact dimensions (TEDs)
9.3.3 Size values
9.3.4 Examples of general applications
9.3.5 Chamfers
9.3.6 Depth specification
9.4 Drawing requirements for axonometric views
10 Datum applications
10.1 General
10.2 Model requirements
10.2.1 Datum systems and model coordinate systems
10.2.2 Identification of datums
10.2.3 Identification of restricted area application
10.2.4 Associativity of datum features and design data
10.2.5 Datum target identification and attachment
10.2.6 Multiple features establishing a datum
10.3 Drawing requirements
11 Geometric tolerances
11.1 General
11.2 Drawing requirements
11.2.1 General
12 Welds
12.1 General
12.2 Common requirements
12.2.1 Application of supplemental geometry
12.2.2 Arrow lines
12.3 Model requirements
12.3.1 Annotation plane
12.3.2 Associativity
12.3.3 Indicating extents of the weld
12.3.4 Query of weld path
12.4 Drawing requirements
13 Surface texture
13.1 General
13.2 Common requirements
13.3 Model requirements
13.3.1 Display techniques
13.3.2 Associativity
Annex A (informative) Former practices
Annex B (informative) Classification codes for drawings and data sets
Annex C (informative) Examples
Bibliography