So is darktable :tinfoil_hat:
What is needed to make the next step(s): more technical details than listed out here
http://www.darktable.org/usermanual/ch02s02s08.html.php
Is it available?
You can see an example XMP file here: darktable/profiling-shot.xmp at master · darktable-org/darktable · GitHub
I’m not sure i understand the question. What do you want to do?
That page is user-facing documentation about basic lightroom importer functionality.
Looking together at the list below - as is:
"At present, darktable is able to deal with the following development steps from Lightroom-generated XMP files (with the corresponding darktable module in parentheses):
- crop and rotate (crop and rotate)
- black level (exposure)
- exposure (exposure)
- vignette (vignette)
- clarity (local contrast)
- tone curve (tone curve)
- HSL (color zones)
- split toning (split toning)
- grain (grain)
- spot removal (spot removal)"
If I make an XMP file in LR (or in FRV), will darktable for Windows support the above: Yes or No?
Thanks, can you please look at #30 as well…
I don’t see why it wouldn’t work, but I don’t have lightroom or windows to test it out.
If you have light room or FRV with light room export capabilities, why not test it out? If it doesn’t work, then we can talk.
Quick questions: is it - as of today - a part of darktable for Windows? Who has tested it?
darktable on windows is still in early stages. If you’re having a problem please report it. The developers rely on users of their respective platforms to do the testing.
It seems that you’d want to export a LR XMP from FRV then try and import that into darktable.
All these theoretical questions about compatibility can be solved by just trying it.
Who has tested it on windows? I don’t know, I haven’t seen anyone report it as not working. No news is good news.
That page is talking about dt support for LR some parameters, so it is unclear to me why you think that dt, but on some particularly oddball platform, might intentionally miss that functionality.
That being said, no clue whatsoever, we (most of dt devs) don’t use LR (or FRV). It sounds like you want to try and report the results.
My intention was/is simple enough (I hope): to ask here about a possibility to use FRV and darktable for Windows (!) together via re-using XMP sidecar files. Please go back to my initial question.
The answers were: try and report - or start from reading the source code. Both are acceptable for me, although I prefer Yes/No (if from developers) and natural languages, not C/CPP and XML. 
Nope, that absolutely won’t work. Not with LR, not with anything else that is not darktable.
The conversion (not counting the standard XMP tags like rating, etc) is one way only.
What do you exactly mean? Can darkatable for Windows read an XMP file as shown in the manual (see above)?
I feel like this is a severely off-topic. Perhaps you should start a new thread, in a proper category.
Not counting the standard XMP tags like rating, subject, keywords, etc, which should just work;
darktable should be able to read lr development steps from xmp’s;
darktable will not be able to write lr development steps into xmp’s;
lr obviously will not be able to read darktable development steps from xmp’s.
Do we have a chance to use Fast Raw Viewer and DTfW in the same streamlined workflow and re-use the XMP file after FRV? There was a discussion a year ago or so, probably stopped.
Other ways of how do not do same things twice?
Just to update the status.
Edits made in fast raw viewer will not be read by darktable, except for possibly star ratings, keywords, and other very common metadata fields. Things like exposure adjustments, curves, and other editing tools will not carry over.
What do you miss in dt what you get in frv?
Well, fast culling, raw histo accuracy, first corrections … in fact, whatever I did in FRV and saved in XMP can not be exported to DTfW. From the other hand, it can be shared with LR.
I think the idea is clear: to start the next step in the workflow exactly from the previous step results.
I am almost sure that it is doable for you to read the XMP file created in FRV. As of today, the FRV results can be exported (fully or partially) to LR and RPP (e.g. exposure, WB…).
The point is how to do the same to/from DTfW. Can save a lot of time for FRV users.