How does a *.cgr format differs from other similar (step and iges) formats in Catia V5?

How does a *.cgr format differs from other similar (step and iges) formats in Catia V5?

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cgr-files only present the outer surface of a part/assembly. This surface is tessellated (consist only of triangles). This format is only for representation (DMU).

 
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If you get an IGS, STEP file, you can´t see the history, but you can work with the surfaces or volumes (for example edge fillet or hole)
If you get an CGR, you can´t see the history and you can´t work with it.

greetings

 
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Cgr lightweight Viewer of Catia. If you working on large models generally we are opening models at cgr mode and more faster work with it. Also if you working with subcontractors on project and dont want to give model with parametric data you can easly export model to cgr. And your subcontractors able to work on full model, assembly without design data.

 
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how i can convert cgr file to step file??

 
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