When is the new PreservedFileName tag being filled?

[ubacher]

When is the new tag
{File.MD.XMP::xmpMM\PreservedFileName\PreservedFileName\0}
filled?

The renamer does not fill it, it seems.

( I came across this tag after my renamer script seemed to cause it's creation. (And filled it with the
original name! Also - it showed up in my error log as reported elsewhere.)

Then the topic of copy then rename came up. This made me think one could use this tag profitably.
But this would require that a rename operation store the original file name in this tag.
https://www.photools.com/community/index.php?topic=8704.0

[Mario]

Just checked. When I rename a file in the Renamer, the {File.MD.XMP::xmpMM\PreservedFileName\PreservedFileName\0} is filled with the previous file name if a) the tag not already exists or has an empty value.