Variables exported from Mac's Photos.app to XMP

There is an option to "Export IPTXC as XMP" when you export photos from Mac's Photos.app by selecting File>Export>Export Unmodified Original... Variables in XMP is useful for arranging photos. but what are they?

"Export IPTC to XMP" option in the export window

I have tinkered with variables on Photos and by using exiftool to map them onto those in XMP files. Here is the correspondence table. Information edited on Photos is prioritized over EXIF metadata.

XMPPhotos.appEXIF
dc:titleTitleTitle
photoshop:DateCreatedDate and timeDate/Time Original
exif:GPSTimeStamp-Date/Time Original
dc:descriptionCaptionImage Description
rdf:liKeyword, People?

exif:GPSLongitude
exif:GPSLongitudeRef
exif:GPSLatitude
exif:GPSLatitudeRef
LocationGPS information

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