To clean up some things, I exported all of the files from a folder into DNG. They were a mixed bag of JPEG, TIF, RAW, and DNG. All went well, but now my question is, where does LR put any future changes that would have been put in XMP files? Does the system still write to XMP? Or does it write the data directly into the DNG files? I looked hither and yon and could not discover the answer.