Quel est l'espace colorimétrique dans Nik 7

[Wolfgang ([ Win10, PL+VP+FP, Nik7 / 3.3 ])]

While I’m still on the old LR 5.7 …

• sent a raw-file from LR to Nik 7 ColorEfex
  in Colorspace ProPhoto RGB *)
  

  

• could also have been exported from LR as TIFF
  in ProPhoto RGB (or other ‘registered’ colorspaces) **)
  

*)
checked with ExifTool and PS

**)
BTW, the same thing when exporting from PL(7) to Nik