Specification of a CAD*I Neutral File for Solids Version 2.1 [Paperback]

Edited for Working Group 2 (WG 2): Cisigraph, Cranfield Institute of Technology, Danmarks Tekniske Hojskole, Kernforschungszentrum Karlsruhe GmbH, NEH Consulting Engineers ApS, Universit?t Karlsruhe1.0 Purpose.- 2.0 Approach.- 2.1 CAD modelling and data storage.- 2.2 Steps taken in the development of the file specification.- 2.3 The finite State machine approach.- 3.0 Basic Principles.- 3.1 Relationships between operating systems and CAD.- 3.2 Informal description of the CAD data schema.- 3.2.1 Entities, attributes, references.- 3.2.2 Relations, properties.- 3.2.3 Scopes.- 3.2.4 External references.- 3.2.5 Worlds and libraries.- 3.2.6 Assemblies and components.- 3.2.7 Geometry, Wireframe, Surface, and Solids.- 3.2.8 Boundary representation.- 3.2.9 Constructive solid geometry.- 3.2.10 Instancing and placement.- 3.2.11 Parametric models.- 3.2.12 Macro facility.- 3.2.13 Material property.- 3.2.14 User-defined name.- 3.2.15 User records.- 3.3 Basic concepts for the physical layer.- 3.3.1 The envelope concept.- 3.3.2 Formal translation from the schema specification.- 3.3.3 Block structure.- 3.3.4 Strictly sequential file.- 4.0 Schema Specification.- 4.1 The high level data specification language HDSL.- 4.2 The formal CAD?I-WG2 schema.- 4.3 Informal description of the schema semantics.- 4.3.1 Any.- 4.3.2 Assembly.- 4.3.3 Boolean.- 4.3.4 Bool_Operand.- 4.3.5 Bool_Operator.- 4.3.6 Bounded_Curve.- 4.3.7 Box.- 4.3.8 B_REP.- 4.3.9 Circle.- 4.3.10 Component.- 4.3.11 Compound_B_REP.- 4.3.12 Construct.- 4.3.13 Curve.- 4.3.14 Cylinder.- 4.3.15 DIM.- 4.3.16 Direction.- 4.3.17 Edge.- 4.3.18 Face.- 4.3.19 Formal_Parameter.- 4.3.20 Geometric.- 4.3.21 Hybrid_Solid.- 4.3.22 Index_Entry.- 4.3.23 Instance.- 4.3.24 Integer.- 4.3.25 Line.- 4.3.26 Linear_Sweep.- 4.3.27 Loop.- 4.3.28 Macro.- 4.3.29 Material.- 4.3.30 Part_Library.- 4.3.31 Placement.- 4.3.32 Planar_Halfspace.- 4.3.33 Plane.- 4.3.34 Point.- 4.3.35 Point_Constant.- 4.3.36 Point_Variable.- 4.3.37 Poly_Face.- 4.3.38 Poly_Hedron.- 4lc¿