rsync to "apply" xattrs-only from other object?

Hi everyone :)

I'd need to re-apply extended filesystem key-value metadata attributes 
(xattrs on ZFS) from one file/folder to another.

But it's mandatory that the target "payload" (=binary file contents) 
stay untouched.
Just transfer (add/merge/overwrite) the xattrs?

Using xattrs professionally for medium-to-large scale heritage and 
science collections, and using rsync for /everything/ regarding 
data-transfer. Thank you all so much!

Would it be possible to hire one for adding that to rsync, merging into 
upstream?
What are your thoughts on this?


Thanks in advance!
Peter

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