The Flash tag may then have a date value that indicates when the picture was taken. This Flash tag example has a defined set of values it can have 27 to be exact. Having this standard set of values for tags allows exiftool users to know what values are available for specific tags. For example, two of these standards are Digital Imaging and Communications in Medicine ( DICOM) and Exchangeable image file format (EXIF). These standards define tag “schemas” that dictate the tags assigned to specific filesįor example, metadata on an x-ray image taken at a hospital or medical center will follow the DICOM standard. The DICOM standard dictates that the image supports tags like the attending physician’s name, procedure date, and exposure length.
You can add some custom tags not defined by the DICOM or EXIF standard in exiftool and change many tags but not all.
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