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| Name | STEP | CATIA Graphical Representation | 
| File extension | .stp, .step | .cgr | 
| Original software | CATIA V5 | |
| Binary | ■ | ■ | 
| ASCII | ■ | |
| Polygonal | ■ | |
| NURBS | ■ | |
| Solids | ||
| Smoothing groups | ■ | ■ | 
| Textures, materials | ■ | |
| Developer/Owner | ISO | Dassault Systemes | 
| Description | ||
| Specification | Download PDF | |
| Format features | The basic format of the transfer surfaces between CAD-systems. See also IGES | The format in which CATIA stores a simplified version of representations of solid and surface models | 
| Viewing software | Delcam Exchange 2012 (free), eDrawings (free) | 3DXML Player (free) |