Specification of a CAD * I Neutral File for CAD Geometry

1. Front Matter

   Pages i-xiii

   PDF

2. Introduction To The Specification

   1. Front Matter

      Pages 1-1

      PDF

   2. Introduction

      • E. G. Schlechtendahl

      Pages 3-5

   3. Approach

      • E. G. Schlechtendahl

      Pages 5-8

   4. Basic Principles

      • E. G. Schlechtendahl

      Pages 9-17

3. Reference Manual

   1. Front Matter

      Pages 19-19

      PDF

   2. The High Level Data Specification Language HDSL

      • E. G. Schlechtendahl

      Pages 21-39

   3. The CAD*I Reference Model Specification

      • E. G. Schlechtendahl

      Pages 43-143

   4. Levels of a Schema Implementations

      • E. G. Schlechtendahl

      Pages 145-149

   5. The Physical Layer

      • E. G. Schlechtendahl

      Pages 151-162

4. Implementation Guidelines

   1. Front Matter

      Pages 165-165

      PDF

   2. Definition of the Finite State Machine Post-Processor

      • E. G. Schlechtendahl

      Pages 167-173

   3. State Lists

      • E. G. Schlechtendahl

      Pages 175-176

   4. Relationships Between Operating Systems and CAD

      • E. G. Schlechtendahl

      Pages 177-178

   5. Programming Rules for Cad*I Processors

      • E. G. Schlechtendahl

      Pages 181-184

   6. Programming Interface

      • E. G. Schlechtendahl

      Pages 185-185

   7. Comments on Pre-Processors

      • E. G. Schlechtendahl

      Pages 187-190

   8. Comments on Post-Processors

      • E. G. Schlechtendahl

      Pages 193-194

   9. The Interface of the CAD*I Parser

      • E. G. Schlechtendahl

      Pages 195-201

5. Back Matter

   Pages 205-242

   PDF

ESPRIT Project 322, "CAD Interfaces", has been established to define the most important interfaces in CAD/CAM systems for data exchange, data base, finite element analysis, experimental analysis, and advanced modeling. The definitions of these interfaces are being elaborated in harmony with international standardization efforts in this field. One principal goal of the project is to develop techniques for the exchange of CAD information between CAD systems, and from the CAD domain to CAA (Computer Aided Analysis) and CAM (Computer Aided Manufacturing). This volume presents a proposal for a neutral file format for CAD data: curves, surfaces, and solids. The specification is based on a reference schema for CAD data bases and is defined informally with respect to its semantics and formally with respect to its syntax. This volume is a revised edition of "Specification of a CAD*I Neutral File for Solids" Version 3.2. The revision reflects the enhancements which result from the implementation of communication processors in eight different CAD systems and from the practical exchange of solid models between these systems. Due to the close interaction between the CAD*I project and the coming-up international standard STEP this specification also serves as an introduction to the geometry model that will be included in the future international standard.

• CAD
• CAM
• computer-aided design (CAD)
• computer-aided manufacturing (CAM)
• data exchange
• design
• interfaces
• manufacturing
• model
• modeling
• operating system
• programming
• semantics
• testing
• validation
• data structures

• Kernforschungszentrum Karlsruhe GmbH, Karlsruhe 1, Federal Republic of Germany

  E. G. Schlechtendahl

Policies and ethics