If you are a developer looking for the actual XMP 4.0 libraries, they are part of the Adobe XMP SDK , which is open-source and freely available for download through the Adobe Developer Console. 3. Using Adobe Bridge as a Workaround
You are trying to use an older custom metadata panel with a newer version of Photoshop that has changed its metadata handling architecture. xmp panels 4.0 sti download
C:\Program Files\Common Files\Adobe\XMP\Custom File Info Panels If you are a developer looking for the actual XMP 4