Darktable importing sidecar files from RawTherapee

Software darktable
1

According to the Darktable 2.4 documentation, DT is able to import a limited number of development steps from Lightroom sidecars files.
But it turns out that DT (windows version) also imports cropping information from RT generated pp3 files.

Which other development steps are imported from pp3-files and is the reverse (RT importing DT sidecar files) also possible?

2

There is no support at all for RT in DT. I’m quite surprised that the cropping was imported!

3

darktable doesn’t import anything here (win10, dt 2.5.0+505~…).