PDF format: 25 years. ISO Standard: 10 years = PDF 2.0.
{"Image Artist": "Matthias", "Image ExifOffset": "2132", "Image XPAuthor": "Matthias", "Image Padding": "[]", "EXIF DateTimeOriginal": "2017:11:28 13:07:41", "EXIF DateTimeDigitized": "2017:11:28 13:07:41", "EXIF SubSecTimeOriginal": "11", "EXIF SubSecTimeDigitized": "11", "EXIF Padding": "[]"}