Probably that question was answered few times before, but didn't find it.
I want to use ExitTool as command line tool for adding xmp data to exist png file, without override exists metadata, and use 1 command for the whole structure, which might be something like this :
<rdf:Description rdf:about=""
xmlns:myTag="http://www.myapp.com/1.0/">
<myTag:Folio>data</myTag:Folio>
<myTag:id>id</myTag:id>
....... some more myTags
</rdf:Description>
Is it possible?
Thanks for any help
If you don't want to overwrite existing XMP then the tags must be individually writable by ExifTool. If you have custom tags you must create corresponding ExifTool user-defined tags (https://exiftool.org/config.html) to be able to write them. Then, a command like this will do what you want:
exiftool -tagsfromfile YOUR_XMP_FILE -all:all EXISTING_PNG_FILE
- Phil