List of STEP (ISO 10303) parts

Descriptions methods

Part 1 - Overview and fundamental principles (1994). Unfortunately outdated, not covering the role of AICs and modules.

Part 11 - EXPRESS language reference manual

Part 12 - EXPRESS -I language reference manual

Part 14 - EXPRESS -X language reference manual

Implementation methods

Part 21 - STEP-File Clear text encoding of the exchange structure

Part 22 - SDAI Standard data access interface specification

Part 23 - C++ language binding of the standard data access interface

Part 24 - C language binding of the standard data access interface

Part 25 - EXPRESS to OMG XMI binding

Part 26 - Binary representation of EXPRESS-driven data using HDF5

Part 27 - Java TM programming language binding to the standard data access interface with Internet/Intranet extensions

Part 28 - STEP-XML XML representation for EXPRESS-driven data

Conformance testing methodology and framework

Part 31 - General concepts

Part 32 - Requirements on testing laboratories and clients

Part 34 - Abstract test methods for application protocol implementations

Part 35 - Abstract test methods for SDAI implementations

Application Protocol

The 'APs' utilize the lower-level information of integrated resources in well defined combinations and configurations to represent a particular data model of an engineering or technical application.

Part 201 - Explicit draughting. Simple 2D drawing geometry related to a product. No association, no assembly hierarchy. Practically a subset of AP202 and 214.

Part 202 - Associative draughting. 2D/3D drawing with association, but no product structure. Practically a subset of AP214.

Part 203: Configuration controlled 3D designs of mechanical parts and assemblies. Mainly used for 3D design and product structure. A subset of AP214 but most widely used.

Part 204 - Mechanical design using boundary representation

Part 207 - Sheet metal die planning and design

Part 209 - Composite and metallic structural analysis and related design

Part 210 - Electronic assembly, interconnect and packaging design. The most complex and sophisticated STEP AP.

Part 212 - Electrotechnical design and installation. Designed as a complement for AP214, but not fully harmonized with it.

Part 214 - Core data for automotive mechanical design processes

Part 215 - Ship arrangement

Part 216 - Ship moulded forms

Part 218 - Ship structures

Part 219 - Dimensional inspection information exchange

Part 221 - Functional data and their schematic representation for process plant

Part 223 - Exchange of design and manufacturing product information for cast parts, currently on CD level

Part 224 - Mechanical product definition for process plans using machining features

Part 225 - Building elements using explicit shape representation

Part 227 - Plant spatial configuration

Part 232 - Technical data packaging core information and exchange

Part 233 - Systems engineering

Part 235 - Materials information for the design and verification of products

Part 236 - Furniture catalog and interior design

Part 237 - Fluid dynamics

Part 238 - STEP-NC Application interpreted model for computerized numerical controllers

Part 239 - Product life cycle support

Part 240 - Process plans for machined products

ATS - Abstract test suite

An ATS is a formal description on how to test STEP implementations for conformance. They contain a test plan for postprocessors (exporting STEP data) and preprocessors (importing STEP data). The structure of an ATS is defined in part 34.

The original plan of STEP was to have for every AP 2xx a corresponding ATS 3xx, but only a few were finally realized till today.

AIC - Application interpreted constructs

AICs are specializations of the integrated application and generic resources. This is done by subtyping interfaced entities and adding further constraints and rules. No new stand-alone entities are created and no new explicit attributes are added. Most AICs are specializations in the geometric area. AICs did not exist back in 1994 when the first release of STEP got published. But when the 2nd generation of APs grows up it becomes clear that APs do not only share not only the IRs but also a lot of specializations. AICs are a big step towards AP interoperability.

Part 501 - Edge-based wireframe

Part 502 - Shell-based wireframe

Part 503 - Geometrically bounded 2D wireframe

Part 504 - Draughting annotation

Part 505 - Drawing structure and administration

Part 506 - Draughting elements

Part 507 - Geometrically bounded surface

Part 508 - Non-manifold surface

Part 509 - Manifold surface

Part 510 - Geometrically bounded wireframe

Part 511 - Topologically bounded surface

Part 512 - Faceted boundary representation

Part 513 - Elementary boundary representation

Part 514 - Advanced boundary representation

Part 515 - Constructive solid geometry

Part 517 - Mechanical design geometric presentation

Part 518 - Mechanical design shaded representation

Part 519 - Geometric tolerances

Part 520 - Associative draughting elements

Part 521 - Manifold subsurface

Part 522 - Machining features

Part 523 - Curve swept solid

AM - Application modules

see ISO 10303 Application Modules