ČSN EN 9300-120   (310450) Letectví a kosmonautika - LOTAR - Dlouhodobá archivace a vyhledávání v digitální technické dokumentaci produktu 3D, CAD a PDM dat - Část 120: Explicitní CAD 3D geometrie s informacemi o grafickém produktu a výrobě

Anotace textu normy ČSN EN 9300-120   (310450)

This document is applicable to:

- the Presentation of 3D geometrical dimension and tolerance, and 3D annotation attributes,

- their possible semantic links with 3D Geometric shape,

- User Defined Attributes: that are assigned to 3D geometric entities or at the part level.

For the purpose of this document, the semantic definition is at the level that supports associative ´Cross-highlighting´, to illustrate the portion of the geometry to which a PMI element applies.

In this version, the technology used to preserve this 3D information is based on polyline and tessellated presentation. Polyline presentation is a conversion to lines and curves of all 3D annotations by the STEP interfaces of the CAD system, including validation properties. Tessellated presentation is a conversion to tessellated curves and tessellated faces. The main use cases are the Certification and Product Liability of static information, however, re-use is also possible after the deletion of previous PMI and creation of new PMI (refer to clause 3 for definition).

This document does not apply to:

- machine-interpretable PMI ´Representation´,

- how to preserve additional information:

- property rights,

- form features,

- machining features,

- CAD Assemblies.