ISO 10303-502-2000 PDF

Full title and description

Industrial automation systems and integration — Product data representation and exchange — Part 502: Application interpreted construct: Shell‑based wireframe. This part of ISO 10303 defines an application‑interpreted construct (AIC) for representing three‑dimensional wireframe product shape data bounded by one or more non‑overlapping shells, using vertices, edges and curves (including B‑splines).

Abstract

This part specifies the interpretation of integrated STEP resources required to represent product shape with three‑dimensional wireframe models bounded by shells. It covers representation of 3D points and curves, graph‑based wireframe topology (edges and vertices), shell grouping of wireframe elements, and assemblies of wireframe models, while excluding 2D geometry, surface and solid geometry.

General information

• Status: Published
• Publication date: Edition 1 — 2000 (2000‑03).
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 25.040.40 (Industrial process measurement and control)
• Edition / version: 1 (2000)
• Number of pages: 20

Metadata above from the ISO bibliographic record for ISO 10303‑502:2000.

Scope

Specifies a shell‑based wireframe application interpreted construct (AIC) to support representation and exchange of 3D wireframe shape data. In scope are wireframe models described as graphs of edges and vertices (edges intersect only at vertices), shells that bound wireframe components (must not overlap or intersect except at vertices or edges), points and curves in 3D coordinate space (including B‑splines), single models and assemblies. Out of scope are 2D geometry, surface and solid geometry and references to eliminated constructs.

Key topics and requirements

• Definition of the aic_shell_based_wireframe entity and associated EXPRESS listings and diagrams.
• Wireframe topology rules: valid vertex and edge graph representations and validation functions.
• Shell grouping constraints: non‑overlapping/non‑intersecting shell requirements (except at shared edges/vertices).
• Support for 3D geometric primitives: points, parametric curves (including B‑splines) and their use in wireframe edges.
• Interoperability: interpretation of integrated resources required for STEP exchange and conformance with related integrated resources and APs.

Technical requirements and EXPRESS artifacts (entity definitions, validation functions, EXPRESS‑G diagrams) are provided to enable consistent implementation and conformance testing.

Typical use and users

Used by CAD/CAM/CAE developers, PLM/PDM integrators, data exchange specialists, conformance test developers and archival teams that need a neutral, machine‑interpretable representation of conceptual or legacy 3D wireframe geometry where surfaces/solids are not required. The part is one element of the broader ISO 10303 (STEP) family used to enable interoperable product data exchange.

Related standards

ISO 10303 is modular; ISO 10303‑502 references and is intended to be used alongside other STEP parts including Part 1 (fundamentals), Part 11 (EXPRESS), integrated resource parts (for example Parts 41–49), and relevant application protocols (e.g., AP 201/202/203/204). Implementers typically consult these parts for resource definitions, encoding rules and related AP requirements.

Keywords

ISO 10303‑502, shell‑based wireframe, wireframe topology, STEP, AIC, EXPRESS, 3D wireframe, B‑spline, product data representation, CAD data exchange

FAQ

Q: What is this standard?

A: ISO 10303‑502:2000 is a STEP Application Interpreted Construct that defines a shell‑based wireframe representation for 3D product shape data to support neutral exchange and storage.

Q: What does it cover?

A: It covers representation rules and EXPRESS definitions for wireframe models bounded by shells, 3D points and curves (including B‑splines), topology validation rules, and assembly representation; it explicitly excludes 2D geometry, surface and solid geometry.

Q: Who typically uses it?

A: CAD/CAM/CAE software developers, PLM/PDM integrators, data exchange specialists, standards implementers and organizations preserving or translating legacy wireframe models.

Q: Is it current or superseded?

A: ISO 10303‑502:2000 is the first edition (2000) and remains published. Implementers should check the ISO catalogue or their national standards body for the latest confirmation or revision status before purchase or formal conformance work.

Q: Is it part of a series?

A: Yes — it is part of the ISO 10303 family (STEP). The 500‑series contains Application Interpreted Constructs (AICs) intended to harmonize geometry/representation across APs and modules in the STEP architecture.

Q: What are the key keywords?

A: shell‑based wireframe, wireframe topology, STEP, AIC, EXPRESS, 3D wireframe, B‑spline, product data exchange