The AOVs are available as Blender passes.
You can save them like you would in Blender:
Either you save the image as "multilayer EXR", this includes all Blender passes (however only very few programs can read this format, one of them is Blender).
Or you make a little compositing setup where you route the AOVs into a file output node:
https://docs.blender.org/manual/en/dev/ ... /file.html
Note that the interesting options of the file output node are only visible in the properties panel (N-panel) in the node editor.
I think this is the same procedure as in Cycles, or am I wrong?
Example attached.