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AS 3643.1-1989

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AS 3643.1-1989

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Computer graphics — Initial Graphics Exchange Specification (IGES) for digital exchange of product definition data, Part 1: General

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Specifies information structures to be used for the digital representation and communication of product definition data. Use of this Standard permits the compatible exchange of data of product definition data used by various computer-aided design and computer-aided manufacturing (CAD/CAM) systems. It is identical with and has been reproduced from the U.S. Department of Commerce’s National Bureau of Standards Initial Graphics Exchange Specification (IGES) Version 4.0-1988.

Table of contents
Header
About this publication
PREFACE
1 General
1.1 Purpose
1.2 Field of Application
1.3 Untested Entities
1.4 Concepts of Product Definition
1.5 Concepts of the File Structure
1.6 Concepts of Information Structures for Geometric Models
1.6.1 Property Entity
1.6.2 Associativity Entities
1.6.3 View Entity
1.6.4 Drawing Entity
1.6.5 Transformation Matrix Entity
1.6.6 Macro Entities
1.6.7 Implementor Defined Entities
1.7 Appendices
2 Data Form
2.1 General
2.2 ASCII Form
2.2.1 Sequence Numbers
2.2.2 Constants
2.2.2.1 Integer Constants
2.2.2.2 Real Constants
2.2.2.3 String Constants
2.2.2.4 Pointer Constants
2.2.2.5 Language Statement Constants
2.2.2.6 Logical Constants
2.2.3 Rules for Forming and Interpreting Free Formatted Data
2.2.3.1 Parameter and Record Delimiter Combinations
2.2.4 File Structure
2.2.4.1 Start Section
2.2.4.2 Global Section
2.2.4.2.1 Parameter Delimiter Character
2.2.4.2.2 Record Delimiter
2.2.4.2.3 Product Identification From Sender
2.2.4.2.4 File Name
2.2.4.2.5 System ID
2.2.4.2.6 Preprocessor Version
2.2.4.2.7 Number of Binary Bits for Integer Representation
2.2.4.2.8 Single Precision Magnitude
2.2.4.2.9 Single Precision Significance
2.2.4.2.10 Double Precision Magnitude
2.2.4.2.11 Double Precision Significance
2.2.4.2.12 Product Identification for the Receiver
2.2.4.2.13 Model Space Scale
2.2.4.2.14 Unit Flag
2.2.4.2.15 Units
2.2.4.2.16 Maximum Number of Line Weight Gradations
2.2.4.2.17 Size of Maximum Line Width in Units
2.2.4.2.18 Date and Time of File Generation
2.2.4.2.19 Minimum User-Intended Resolution
2.2.4.2.20 Approximate Maximum Coordinate Value
2.2.4.2.21 Name of Author
2.2.4.2.22 Author’s Organization
2.2.4.2.23 Version Number
2.2.4.2.24 Drafting Standard Code
2.2.4.3 Directory Entry Section
2.2.4.3.1 Entity Type Number
2.2.4.3.2 Parameter Data
2.2.4.3.3 Structure
2.2.4.3.4 Line Font Pattern
2.2.4.3.5 Level
2.2.4.3.6 View
2.2.4.3.7 Transformation Matrix
2.2.4.3.8 Label Display Associativity
2.2.4.3.9 Status Number
2.2.4.3.9.1 Blank Status
2.2.4.3.9.2 Subordinate Entity Switch
2.2.4.3.9.3 Entity Use Flag
2.2.4.3.9.4 Hierarchy
2.2.4.3.10 Sequence Number
2.2.4.3.11 Entity Type Number
2.2.4.3.12 Line Weight Number
2.2.4.3.13 Color Number
2.2.4.3.14 Parameter Line Count Number
2.2.4.3.15 Form Number
2.2.4.3.16 Reserved Field
2.2.4.3.17 Reserved Field
2.2.4.3.18 Entity Label
2.2.4.3.19 Entity Subscript Number
2.2.4.3.20 Sequence Number
2.2.4.3.21
2.2.4.4 Parameter Data Section
2.2.4.4.1
2.2.4.4.2
2.2.4.4.3
2.2.4.5 Terminate Section
2.3 Compressed ASCII Format
2.3.1 File Structure
2.4 Binary Form
2.4.1 Constants
2.4.1.1 Integer Numbers
2.4.1.2 Real Numbers
2.4.1.3 String Constants
2.4.1.4 Pointers
2.4.1.5 Language Constants
2.4.2 File Structure
2.4.2.1 Binary Flag Section
2.4.2.2 Start Section
2.4.2.3 Global Section
2.4.2.4 Directory Entry Section
2.4.2.5 Parameter Data Section
2.4.2.6 Terminate Section
2.5 Specific File Structures
2.5.1 Subfigures
2.5.2 Connectivity
2.5.2.1 Connectivity Entities
2.5.2.2 Entity Relationships
2.5.2.3 Information Display
2.5.2.4 Additional Considerations
2.5.3 Macro
2.5.4 External Reference Linkage
2.5.5 Drawings and Views
2.5.6 Finite Element Modeling
2.5.7 Multiple Transformation Entities
2.5.8 Attribute Tables
3 Geometry
3.1 General
3.1.1 Coordinate Systems
3.1.2 Directionality
3.1.3 Geometry Entities
3.2 Circular Arc Entity (Type 100)
3.2.1 Directory DataEntity Type Number: 100
3.2.2 Parameter Data
3.3 Composite Curve Entity (Type 102)
3.3.1 Directory Data Entity Type Number: 102
3.3.2 Parameter Data
3.4 Conic Arc Entity (Type 104)
3.4.1 Directory Data Entity Type Number: 104
3.4.2 Parameter Data
3.5 Copious Data Entity (Type 106)
3.5.1 Directory Data Entity Type Number: 106
3.5.2 Parameter Data
3.6 Plane Entity (Type 108)
3.6.1 Directory Data Entity Type Number: 108
3.6.2 Parameter Data
3.7 Line Entity (Type 110)
3.7.1 Directory Data Entity Type Number: 110
3.7.2 Parameter Data
3.8 Parametric Spline Curve Entity (Type 112)
3.8.1 Directory DataEntity Type Number: 112
3.8.2 Parameter Data
3.9 Parametric Spline Surface Entity (Type 114)
3.9.1 Directory Data Entity Type Number: 114
3.9.2 Parameter Data
3.10 Point Entity (Type 116)
3.10.1 Directory Data Entity Type Number: 116
3.10.2 Parameter Data
3.11 Ruled Surface Entity (Type 118)
3.11.1 Directory Data Entity Type Number: 118
3.11.2 Parameter Data
3.12 Surface of Revolution Entity (Type 120)
3.12.1 Directory Data Entity Type Number: 120
3.12.2 Parameter Data
3.13 Tabulated Cylinder Entity (Type 122)
3.13.1 Directory Data Entity Type Number: 122
3.13.2 Parameter Data
3.14 Transformation Matrix Entity (Type 124)
3.14.1 Directory Data Entity Type Number: 124
3.14.2 Parameter Data
3.15 Flash Entity (Type 125)
3.15.1 Directory DataEntity Type Number: 125
3.15.2 Parameter Data
3.16 Rational B-Spline Curve Entity (Type 126)
3.16.1 Directory DataEntity Type Number: 126
3.16.2 Parameter Data
3.17 Rational B-Spline Surface Entity (Type 128)
3.17.1 Directory DataEntity Type Number: 128
3.17.2 Parameter Data
3.18 Offset Curve Entity (Type 130)
3.18.1 Directory Data Entity Type Number: 130
3.18.2 Parameter Data
3.19 Connect Point Entity (Type 132)
3.19.1 Directory Data Entity Type Number: 132
3.19.2 Parameter Data
3.20 Node Entity (Type 134)
3.20.1 Directory Data Entity Type Number: 134
3.20.2 Parameter Data
3.21 Finite Element Entity (Type 136)
3.21.1 Directory Data Entity Type Number: 136
3.21.2 Parameter Data
3.22 Nodal Displacement and Rotation Entity (Type 138)
3.22.1 Directory Data Entity Type Number: 138
3.22.2 Parameter Data
3.23 Offset Surface Entity (Type 140)
3.23.1 Directory Data Entity Type Number: 140
3.23.2 Parameter Data
3.24 Curve On A Parametric Surface Entity (Type 142)
3.24.1 Directory Data Entity Type Number: 142
3.24.2 Parameter Data
3.25 Trimmed (Parametric) Surface Entity (Type 144)
3.25.1 Directory Data Entity Type Number: 144
3.25.2 Parameter Data
3.26 Nodal Results Entity (Type 146)
3.27 Element Results Entity (Type 148)
3.28 Constructive Solid Geometry Models
3.28.1 Block Entity (Type 150)
3.28.1.1 Directory Data Entity Type Number: 150
3.28.1.2 Parameter Data
3.28.2 Right Angular Wedge Entity (Type 152)
3.28.2.1 Directory DataEntity Type Number: 152
3.28.2.2 Parameter Data
3.28.3 Right Circular Cylinder Entity (Type 154)
3.28.3.1 Directory Data Entity Type Number: 154
3.28.3.2 Parameter Data
3.28.4 Right Circular Cone Frustum Entity (Type 156)
3.28.4.1 Directory Data Entity Type Number: 156
3.28.4.2 Parameter Data
3.28.5 Sphere Entity (Type 158)
3.28.5.1 Directory DataEntity Type Number: 158
3.28.5.2 Parameter Data
3.28.6 Torus Entity (Type 160)
3.28.6.1 Directory DataEntity Type Number: 160
3.28.6.2 Parameter Data
3.28.7 Solid of Revolution Entity (Type 162)
3.28.7.1 Directory DataEntity Type Number: 162
3.28.7.2 Parameter Data
3.28.8 Solid of Linear Extrusion Entity (Type 164)
3.28.8.1 Directory DataEntity Type Number: 164
3.28.8.2 Parameter Data
3.28.9 Ellipsoid Entity (Type 168)
3.28.9.1 Directory DataEntity Type Number: 168
3.28.9.2 Parameter Data
3.28.10 Boolean Tree Entity (Type 180)
3.28.10.1 Directory DataEntity Type Number: 180
3.28.10.2 Parameter Data
3.28.11 Solid Instance Entity (Type 430)
3.28.11.1 Directory DataEntity Type Number: 430
3.28.11.2 Parameter Data
3.28.12 Solid Assembly Entity (Type 184)
3.28.12.1 Directory DataEntity Type Number: 184
3.28.12.2 Parameter Data
4 Non-geometry
4.1 General
4.2 Annotation Entities
4.2.1 Entity Type/Type Number
4.2.2 Construction
4.2.3 Definition Space
4.2.4 Angular Dimension Entity (Type 202)
4.2.4.1 Directory DataEntity Type Number: 202
4.2.4.2 Parameter Data
4.2.5 Centerline Entity (Type 106, Form 20-21)
4.2.6 Diameter Dimension Entity (Type 206)
4.2.6.1 Directory DataEntity Type Number: 206
4.2.6.2 Parameter Data
4.2.7 Flag Note Entity (Type 208)
4.2.7.1 Directory DataEntity Type Number: 208
4.2.7.2 Parameter Data
4.2.8 General Label Entity (Type 210)
4.2.8.1 Directory DataEntity Type Number: 210
4.2.8.2 Parameter Data
4.2.9 General Note Entity (Type 212)
4.2.9.1 Directory DataEntity Type Number: 212
4.2.9.2 Parameter Data
4.2.10 Leader (Arrow) Entity (Type 214)
4.2.10.1 Directory DataEntity Type Number: 214
4.2.10.2 Parameter Data
4.2.11 Linear Dimension Entity (Type 216)
4.2.11.1 Directory DataEntity Type Number: 216
4.2.11.2 Parameter Data
4.2.12 Ordinate Dimension Entity (Type 218)
4.2.12.1 Directory DataEntity Type Number: 218
4.2.12.2 Parameter Data
4.2.13 Point Dimension Entity (Type 220)
4.2.13.1 Directory DataEntity Type Number: 220
4.2.13.2 Parameter Data
4.2.14 Radius Dimension Entity (Type 222)
4.2.14.1 Directory DataEntity Type Number: 222 Form Number: 0      Single Leader Format
4.2.14.2 Parameter Data
4.2.15 General Symbol Entity (Type 228)
4.2.15.1 Directory DataEntity Type Number: 228
4.2.15.2 Parameter Data
4.2.16 Sectioned Area Entity (Type 230)
4.2.16.1 Directory DataEntity Type Number: 230
4.2.16.2 Parameter Data
4.2.17 Section Entity (Type 106, Forms 31-38)
4.2.18 Witness Line Entity (Type 106, Form 40)
4.3 Structure Entities
4.3.1 Entity Type/Type Number
4.3.2 Associativity Definition Entity (Type 302)
4.3.2.1 Directory DataEntity Type Number: 302
4.3.2.2 Parameter Data
4.3.3 Associativity Instance Entity (Type 402)
4.3.3.1 Directory DataEntity Type Number: 402
4.3.3.2 Parameter Data
4.3.3.3 Pre-defined Associativities
4.3.3.3.1 FORM NUMBER: 1   Group
4.3.3.3.2 FORM NUMBER: 2      External Logical Reference File Index
4.3.3.3.3 FORM NUMBER: 3      Views Visible
4.3.3.3.4 FORM NUMBER: 4      Views Visible, Color, Line Weight
4.3.3.3.5 FORM NUMBER: 5      Entity Label Display
4.3.3.3.6 FORM NUMBER: 7      Group Without Back Pointers
4.3.3.3.7 FORM NUMBER: 9       Single Parent Associativity
4.3.3.3.8 FORM NUMBER: 12    External Reference File Index
4.3.3.3.9 FORM NUMBER: 13      Dimensioned Geometry Associativity
4.3.3.3.10 FORM NUMBER: 14      Ordered Group with Back Pointers
4.3.3.3.11 FORM NUMBER: 15       Ordered Group without Back Pointers
4.3.3.3.12 FORM NUMBER: 16      Planar Associativity
4.3.3.3.13 FORM NUMBER: 18      Flow
4.3.4 Drawing Entity (Type 404)
4.3.4.1 Directory DataEntity Type Number: 404
4.3.4.2 Parameter Data
4.3.5 Line Font Definition Entity (Type 304)
4.3.5.1 Directory DataEntity Type Number: 304Form Number: 1
4.3.5.2 Parameter Data
4.3.5.3 Directory DataEntity Type Number: 304Form Number: 2
4.3.5.4 Parameter Data
4.3.6 MACRO Capability
4.3.6.1 General
4.3.6.2 MACRO Syntax
4.3.6.3 MACRO Definition Entity (Type 306)
4.3.6.3.1 Directory DataEntity Type Number: 306
4.3.6.3.2 Parameter Data
4.3.6.3.3
4.3.6.4 MACRO Instance Entity
4.3.6.4.1 Directory Data
4.3.6.4.2 Parameter Data
4.3.6.5 Examples of MACRO Usage
4.3.7 Property Entity (Type 406)
4.3.7.1 Directory DataEntity Type Number: 406
4.3.7.2 Parameter Data
4.3.7.3 Defined Properties
4.3.7.3.1 FORM NUMBER: 1      Definition levels
4.3.7.3.2 FORM NUMBER: 2      Region Restriction
4.3.7.3.3 FORM NUMBER: 3      Level Function
4.3.7.3.4 FORM NUMBER: 5      Line Widening
4.3.7.3.5 FORM NUMBER: 6      Drilled Hole
4.3.7.3.6 FORM NUMBER: 7      Reference Designator
4.3.7.3.7 FORM NUMBER: 8      Pin Number
4.3.7.3.8 FORM NUMBER: 9      Part Number
4.3.7.3.9 FORM NUMBER: 10      Hierarchy
4.3.7.3.10 FORM NUMBER: 11      Tabular Data
4.3.7.3.11 FORM NUMBER: 12     External Reference File List
4.3.7.3.12 FORM NUMBER: 13     Nominal Size
4.3.7.3.13 FORM NUMBER: 14     Flow Line Specification
4.3.7.3.14 FORM NUMBER: 15     Name
4.3.7.3.15 FORM NUMBER: 16     Drawing Size
4.3.7.3.16 FORM NUMBER: 17     Drawing Units
4.3.7.3.17 FORM NUMBER: 18     Intercharacter Spacing
4.3.8 Subfigure Definitions
4.3.8.1 Subfigure Definition Entity (Type 308)
4.3.8.1.1 Directory DataEntity Type Number: 308
4.3.8.1.2 Parameter Data
4.3.8.2 Network Subfigure Definition Entity (Type 320)
4.3.3.2.1 Directory DataEntity Type Number: 320
4.3.8.2.2 Parameter Data
4.3.9 Subfigure Instances
4.3.9.1 Singular Subfigure Instance Entity (Type 408)
4.3.9.1.1 Directory DataEntity Type Number: 408
4.3.9.1.2 Parameter Data
4.3.9.2 Rectangular Array Subfigure Instance Entity (Type 412)
4.3.9.2.1 Directory DataEntity Type Number: 412
4.3.9.2.2 Parameter Data
4.3.9.3 Circular Array Subfigure Instance Entity (Type 414)
4.3.9.3.1 Directory DataEntity Type Number: 414
4.3.9.3.2 Parameter Data
4.3.9.4 Network Subfigure Instance Entity (Type 420)
4.3.9.4.1 Directory DataEntity Type Number: 420
4.3.9.4.2 Parameter Data
4.3.10 Text Font Definition Entity (Type 310)
4.3.10.1 Directory DataEntity Type Number: 310
4.3.10.2 Parameter Data
4.3.11 View Entity (Type 410)
4.3.11.1 Directory DataEntity Type Number: 410
4.3.11.2 Parameter Data
4.3.12 External Reference Entity (Type 416)
4.3.12.1 Directory DataEntity Type Number: 416
4.3.12.2 Parameter Data (Form 0 and 2)
4.3.12.3 Parameter Data (Form 1)
4.3.13 Nodal Load/Constraint Entity (Type 418)
4.3.13.1 Directory DataEntity Type Number: 418
4.3.13.2 Parameter Data
4.3.14 Text Display Template Entity (Type 312)
4.3.14.1
4.3.14.1.1 Directory DataEntity Type Number: 312Form Number: 0
4.3.14.1.2 Parameter Data
4.3.14.2 Incremental Text Display Template (Form 1)
4.3.14.2.1 Directory DataEntity Type Number: 312Form Number: 1
4.3.14.2.2 Parameter Data
4.3.15 Color Definition Entity (Type 314)
4.3.15.1 Directory DataEntity Type Number: 314
4.3.15.2 Parameter Data
4.3.16 Attribute Table Definition Entity (Type 322)
4.3.17 Attribute Table Instance Entity (Type 422)
Appendix A
Appendix B
B.1 Introduction
B.1.1 Purpose
B.1.2 Assumptions
B.2 Connectivity
B.2.1 General
B.2.2 Representation
B.2.2.1 Network Subfigure Construction
B.2.2.2 Connect Points
B.2.2.3 Signal Construction
B.2.2.4 Information Display
B.2.2.5 Additional Considerations
B.2.2.6 Figures
B.3 Electrical Entity Descriptions
Appendix C
C.1 Flowsheet Characteristics
C.2 Support for Flowsheets
C.3 Plant Flowsheet Example
C.4 Network Subfigure Definitions
C.5 Network Subfigure Instances
C.6 Geometric Entities for Pipeline or Stream
C.7 Attributes
C.8 Flow Paths
C.9 Text Display Templates
C.10 External References
C.11 Encoded Flowsheet
Appendix D
D.1 Piping Model Characteristics
D.2 Entity Support for Piping Models
D.3 Piping Model Example
D.4 Component Definitions
D.5 Attributes
D.6 Flow Paths
D.7 Connectivity Across Piping Models
D.8 Encoded Piping Model Example
Appendix E
E.1 Introduction
E.2 Spline Functions
E.3 Spline Curves
E.4 Rational B-spline Curves
E.5 Spline Surfaces
E.6 Rational B-spline Surfaces
Appendix F
Appendix G
Appendix H
Appendix I
I.1 General
I.2 Associativity Instance Entity (Type 402)
I.3 Property Entity (Type 406)
I.4 General Note Font Zero
Appendix J
J.1 Introduction
J.2 Null Entity (Type 0)
J.3 Nodal Results Entity (Type 146)
J.3.1 Directory Data
J.3.2 Parameter Data
J.4 Element Results Entity (Type 148)
J.4.1 Directory Data
J.4.2 Parameter Data
J.5 Additional General Note Fonts
J.6 Radius Dimension Entity (Type 222, Form 1)
J.6.1 Directory DataEntity Type Number: 222 Form Number: 1     Multiple Leader Format
J.6.2 Parameter Data
J.7 General Symbol Entity (Type 228, Forms 1,2,3)
J.8 Attribute Table Definition Entity (Type 322)
J.8.1 Attribute Table Definition (Form 0)
J.8.1.1 Directory DataEntity Type Number: 322Form Number: 0
J.8.1.2 Parameter Data
J.8.2 Attribute Table Definition (Form 1)
J.8.2.1 Directory DataEntity Type Number: 322Form Number: 1
J.8.2.1.1 Parameter Data
J.8.3 Attribute Table Definition (Form 2)
J.8.3.1 Directory DataEntity Type Number: 322Form Number: 2
J.8.3.2 Parameter Data
J.9 Attribute Table Instance Entity (Type 422)
J.9.1 Attribute Table Instance (Form 0)
J.9.1.1 Directory DataEntity Type Number: 422Form Number: 0
J.9.1.2 Parameter Data
J.9.2 Attribute Table Instance (Form 1)
J.9.2.1 Directory DataEntity Type Number: 422Form Number: 1
J.9.2.2 Parameter Data
J.10 Intercharacter Spacing Property
Appendix K
Appendix L

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Published

20/02/1989
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AS 3643.1-1989
$321.76