Everything points to the fact that .ocdc and .wdx files are used in Mathematica math visualization and computing program from Wolfram Research.
OCDC to WDX conversion might actually be export of the default document format to WDX (exchange) format, so most likely possible. We have not found any specific information about this export however, so if you struggle with this export somehow or face specific issue, it might be best to reach out to their support or online community.
Updated: September 25, 2023