# ISO 128-21:1997 — Withdrawn and superseded ISO standards

For ISO 128-21:1997, item title is Technical drawings — General principles of presentation — Part 21: Preparation of lines by CAD systems; status code is 9599; successor is ISO 128-2:2020; withdrawn / published date is 1997-02-27, recorded from its source on 2026-08-05.

- **Identifier:** ISO 128-21:1997 _(verified: appears in the quote below)_
- **Item title:** Technical drawings — General principles of presentation — Part 21: Preparation of lines by CAD systems _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 128-2:2020
- **Withdrawn / published date:** 1997-02-27 _(verified: appears in the quote below)_

## What the source says

> 27382,IS,,ISO 128-21:1997,Technical drawings — General principles of presentation — Part 21: Preparation of lines by CAD systems,Dessins techniques — Principes généraux de représentation — Partie 21: Préparation des traits par systèmes de CAO,1997-02-27,1,"['35.240.10','01.100.01']",ISO/TC 10/SC 1,9599,[3938],[69129],"['en','fr']",12,<p>Specifies procedures for the calculation of the most important basic types of non-continuous lines according to ISO 128-20 and their line elements.</p>

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).