XYZ Printing support

dose octoprint work with XYZ printers as they use a proprietary file format

This graphic which discusses the Slic3r software configuration seems to indicate that the da Vinci printer, at least, uses reprap/Marlin, etc:

And yet, that same page describes what this guy had to do to make the gcode file from Slic3r work...

The process described takes the normal text-file output, encodes it as Base-64 and saves it with a .3w file extension.

That said, you couldn't stream this via OctoPrint since it's not a text file.