ISO 10303-55-2005 PDF

Full title and description

Industrial automation systems and integration — Product data representation and exchange — Part 55: Integrated generic resource: Procedural and hybrid representation (ISO 10303-55:2005). This part of ISO 10303 (STEP) defines resource constructs to represent procedural (construction-history) and hybrid models and is published by the International Organization for Standardization (ISO).

Abstract

ISO 10303-55:2005 specifies resource constructs for representing procedural or construction-history models (defined by sequences of constructional operations), supports hierarchical structuring of construction sequences, embedding explicit elements to form hybrid models, the use of representation_item definitions from other ISO 10303 parts, dual (procedural + explicit current result) representations, association of design rationale, and specializations for procedural representation of shape models.

General information

• Status: Published (confirmed in systematic review; remains current).
• Publication date: Published 27 January 2005 (Edition 1, 2005‑02 shown on ISO record).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.040.40 (Industrial automation systems and integration — Product data representation and exchange).
• Edition / version: Edition 1, 2005.
• Number of pages: 48.

(General bibliographic and lifecycle data as recorded in the ISO bibliographic entry for ISO 10303-55:2005.)

Scope

Defines resource-level constructs to capture and exchange procedural (construction-history) models and hybrid models composed of procedural sequences plus explicitly defined elements. It covers the specification of sequences of constructional operations for generating explicit models, hierarchical organization of those sequences, association of explicit representations with procedural definitions (dual representation), identification of interactive picks and suppressible operations for simplification, and mechanisms to reference representation_item types defined in other ISO 10303 parts.

Key topics and requirements

• Resource constructs for procedural (construction-history) models.
• Specification and sequencing of constructional operations to generate explicit representations.
• Hierarchical structuring of construction sequences and support for modular composition.
• Embedding explicit elements within procedural sequences to enable hybrid representations.
• Dual-representation mechanism linking a procedural model to an explicit “current result”.
• Association of design rationale and metadata with procedural models.
• Identification and suppression of operations for model simplification; specializations for shape-model procedural representations.

These topics describe the functional requirements that implementers and schema designers must support to represent procedural and hybrid models within the STEP framework.

Typical use and users

Used by standards implementers, CAD/CAM/CAE/PDM software vendors, systems integrators, and organizations needing to exchange or archive procedural/construction-history product models. Typical scenarios include parametric or history-based CAD data exchange, model simplification workflows, digital archiving of construction sequences, and integration of procedural definitions with explicit geometry for downstream consumers. Users commonly work with STEP application protocols and resource parts when building or validating data exchange solutions.

Related standards

ISO 10303-55 is one resource part of the broader ISO 10303 (STEP) family. Related and commonly referenced parts include core description and implementation parts (for example EXPRESS and STEP-file parts) and geometric/representation resources used by procedural constructs; a technical corrigendum (ISO 10303-55:2005/Cor 1:2005) was published to correct the original edition. For broader context on STEP and related application protocols (APs) see introductory STEP resources and ISO’s STEP module and resource library references.

Keywords

ISO 10303, STEP, procedural representation, construction history, hybrid representation, integrated generic resource, representation_item, dual representation, CAD data exchange, product model data.

FAQ

Q: What is this standard?

A: ISO 10303-55:2005 is Part 55 of ISO 10303 (STEP) titled “Integrated generic resource: Procedural and hybrid representation”; it defines resource constructs to represent procedural (construction-history) and hybrid product models.

Q: What does it cover?

A: It covers representation constructs for sequences of constructional operations, hierarchical structuring of those sequences, embedding explicit elements for hybrid models, linking procedural models to an explicit current-result model, associating design rationale, and specializations for procedural shape representation.

Q: Who typically uses it?

A: CAD/CAM/CAE vendors, PDM/PLM integrators, software implementers working with STEP application protocols, and organizations needing neutral exchange or long‑term archival of procedural or hybrid product models.

Q: Is it current or superseded?

A: The 2005 edition remains the published edition and was last reviewed and confirmed in 2025, so it is recorded as current in ISO’s lifecycle records (no superseding edition published as of the latest ISO bibliographic update).

Q: Is it part of a series?

A: Yes — it is a resource part within the ISO 10303 family (commonly called STEP, the Standard for the Exchange of Product model data). ISO 10303 comprises many parts (application protocols, resources, implementation methods) that together define product data representation and exchange.

Q: What are the key keywords?

A: Procedural representation, construction history, hybrid model, representation_item, dual representation, STEP, ISO 10303, CAD data exchange.