ISO 10303-42:2003
Industrial Automation Systems and Integration - Product Data Representation and Exchange - Part 42: Integrated Generic Resource: Geometric and Topological Representation (Third Edition)

Standard No.

ISO 10303-42:2003

Release Date

2003

Published By

International Organization for Standardization (ISO)

Status

Withdraw

Replace By

ISO 10303-42:2003/cor 1:2007

Latest

ISO 10303-42:2022

Scope

This part of ISO 10303 specifies the resource constructs for the explicit geometric and topological representation of the shape of a product. The scope is determined by the requirements for the explicit representation of an ideal product model; tolerances and implicit forms of representation in terms of features are out of scope. The geometry in clause 4 and the topology in clause 5 are available for use independently and are also extensively used by the various forms of geometric shape model in clause 6. In addition, this part of ISO 10303 specifies specialisations of the concepts of representation where the elements of representation are geometric. 1 Geometry The following are within the scope of the geometry schema: — definition of points, vectors, parametric curves and parametric surfaces; — definition of finite volumes with internal parametrisation; — definition of transformation operators; — points defined directly by their coordinate values or in terms of the parameters of an existing curve or surface; — definition of conic curves and elementary surfaces; — definition of curves defined on a parametric surface; — definition of general parametric spline curves, surfaces and volumes; — definition of point, curve and surface replicas; — definition of offset curves and surfaces; — definition of intersection curves. The following are outside the scope of this part of ISO 10303: — all other forms of procedurally defined curves and surfaces; — curves and surfaces which do not have a parametric form of representation; — any form of explicit representation of a ruled surface. NOTE For a ruled surface the geometry is critically dependent upon the parametrisation of the bound-ary curves and the method of associating pairs of points on the two curves. A ruled surface with B-spline boundary curves can however be exactly represented by the B-spline surface entity. 2 Topology The following are within the scope of the topology schema: — definition of the fundamental topological entities vertex, edge, and face, each with a specialised subtype to enable it to be associated with the geometry of a point, curve, or surface, respectively; — collections of the basic entities to form topological structures of path, loop and shell and constraints to ensure the integrity of these structures; — orientation of topological entities. 3 Geometric Shape Models The following are within the scope of the geometric model schema: — data describing the precise geometric form of three-dimensional solid objects; — constructive solid geometry (CSG) models; — CSG models in two-dimensional space; — definition of CSG primitives and half-spaces; — creation of solid models by sweeping operations; — manifold boundary representation (B-rep) models; — constraints to ensure the integrity of B-rep models; — surface models; — wireframe models; — geometric sets; — creation of a replica of a solid model in a new location. The following are outside the scope of this part of ISO 10303: — non-manifold boundary representation models; — spatial occupancy forms of solid models (such as octree models); — assemblies and mechanisms.

ISO 10303-42:2003 history

• 2022 ISO 10303-42:2022 Industrial automation systems and integration — Product data representation and exchange — Part 42: Integrated generic resource: Geometric and topological representation
• 2019 ISO 10303-42:2019 Industrial automation systems and integration — Product data representation and exchange — Part 42: Integrated generic resource: Geometric and topological representation
• 2018 ISO 10303-42:2018 Industrial automation systems and integration — Product data representation and exchange — Part 42: Integrated generic resource: Geometric and topological representation
• 2014 ISO 10303-42:2014 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resource: Geometric and topological representation
• 2007 ISO 10303-42:2003/cor 1:2007 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resource: Geometric and topological representation, TECHNICAL CORRIGENDUM 1 (Third Edition)
• 2003 ISO 10303-42:2003 Industrial Automation Systems and Integration - Product Data Representation and Exchange - Part 42: Integrated Generic Resource: Geometric and Topological Representation (Third Edition)
• 2001 ISO 10303-42:1994/Cor 3:2001 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resource: Geometric and topological representation; Technical Corrigendum 3
• 2001 ISO 10303-42:2000/Cor 1:2001 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resource: Geometric and topological representation; Technical Corrigendum 1
• 2000 ISO 10303-42:2000 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resource: Geometric and topological representation
• 1999 ISO 10303-42:1994/Cor 2:1999 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resources: Geometric and topological representation; Technical Corrigendum 2
• 1999 ISO 10303-42:1994/Cor 1:1999 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resources: Geometric and topological representation; Technical corrigendum 1
• 1994 ISO 10303-42:1994 Industrial automation systems and integration - Product data representation and exchange - Part 42: Integrated generic resources: Geometric and topological representation