# ISO 10303-521:2003 — Withdrawn and superseded ISO standards

For ISO 10303-521:2003, item title is Industrial automation systems and integration — Product data representation and exchange — Part 521: Application interpreted construct: Manifold subsurface; status code is 9599; successor is ISO 10303-521:2011; withdrawn / published date is 2003-03-17, recorded from its source on 2026-08-05.

- **Identifier:** ISO 10303-521:2003 _(verified: appears in the quote below)_
- **Item title:** Industrial automation systems and integration — Product data representation and exchange — Part 521: Application interpreted construct: Manifold subsurface _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 10303-521:2011
- **Withdrawn / published date:** 2003-03-17 _(verified: appears in the quote below)_

## What the source says

> 36500,IS,,ISO 10303-521:2003,Industrial automation systems and integration — Product data representation and exchange — Part 521: Application interpreted construct: Manifold subsurface,Systèmes d'automatisation industrielle et intégration — Représentation et échange de données de produits — Partie 521: Construction interprétée d'application: Surface complexe à topologie non eulérienne,2003-03-17,1,['25.040.40'],ISO/TC 184/SC 4,9599,,[59215],['en'],36,"<p>ISO 10303-521:2003 specifies the interpretation of the integrated resources to satisfy the requirement for the definition of a shape representation containing open shells defined as connected face sub sets. The domain of each connected face

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).