What is the difference between these three? According to Wikipedia, all are formats for adding metadata to various file formats.Yet I see posts that seem to speak of EXIF as the place where IPTC and sometimes XMP data are stored - "the EXIF header", "XMP/IPTC data stored in the EXIF header", etc.Also, NX2 says you can store both XMP and IPTC data in the EXIF header. How do you choose/tell whether the metadata you type in is being stored in XMP or IPTC format? Or does it matter?Thanks for clearing this up.
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