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Non-binding VDA recommendation 4950 describes the processing (preparation, performance and post-processing) of the exchange of CAx data between various different companies.
The term "CAD/CAM data exchange" covers in this case asynchronous exchange of files by offline data exchange (CD, DVD, USB stick) or online data exchange (ISDN, ENX, web, direct line, etc.).
Synchronous exchange or comparison of data in PDM/PLM systems (e.g. via external clients) is not considered here (see in this connection VDA 4956).