I've scanned the almost-six-hundred photos in my Dad's family photo albums, but now I need to enter the notes he wrote next to each image, listing people, locations, (approximate) dates, and other information.
I'm sure I can do this with any decent photo organization tool, but I'm worried that I'll enter all the data into some proprietary system and then not be able to get it out. I need to be able to flexibly export the photos and data to a different system (Mac, Windows, the Web, etc; who knows).
I know there's lots of ways to store data inside the image files (IPTC/XMP/EXIF), in sidecar files, or a database. But, are any of them more accepted for import/export with other tools?
(If it matters, I'm on a Mac, and Apple Photos is the tool I'd use if I didn't care about portability.)