Saving (multiple) *.fm files as XML preferably via command line

Hey there,

I would like to save (multiple) *.fm files as XML, preferably via command line and was pointed to this forum by the Technical Support.

So far I don't have any experience with ExtendScript but general programming experience is available.

Edit: Using FrameMaker 12

Appreciating any hints in the right direction or a simple solution.

Thanks and best regards!