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am a beginer in catia,so this seems to be simple to you,

can any body explain detaily the terms Geometrical set, Ordered geometrical set, Hybrid design, classes of suface operation(eg,,A class etc)


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Geometric Sets vs Part Bodies


Here are some quick definitions. You're professor should explain these in more detail, or you can look this up in the Help files and/or the CATIA Companion.

Geometric Sets are a section of the CATPart file that contains the construction geometry, (wireframe (points/lines/curves) and/or surface elements). Geometric Sets can be "ordered" or not - Ordered Geometric Sets require the elements be in sequential order.

Part Bodies contain the solid definition of a CATPart file.

Hybrid Design is a mode that can be toggled on or off. When the Hybrid Design mode is envoked, construction geometry can belong directly to a PartBody. (most companies do not use Hybrid Design, because it is a new feature that was recently added to CATIA)

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