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Category: Computing
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Exchangeable Image File Format (EXIF) is the standard for metadata embedded in a picture file, particularly from smart phone cameras. A few selected tag definitions:

Tag ID Tag Name Values
0x0112 Orientation 1 = Horizontal (normal)
2 = Mirror horizontal
3 = Rotate 180
4 = Mirror vertical
5 = Mirror horizontal and rotate 270 CW
6 = Rotate 90 CW
7 = Mirror horizontal and rotate 90 CW
8 = Rotate 270 CW
0x8822 ExposureProgram 0 = Not Defined
1 = Manual
2 = Program AE
3 = Aperture-priority AE
4 = Shutter speed priority AE
5 = Creative (Slow speed)
6 = Action (High speed)
7 = Portrait
8 = Landscape
9 = Bulb (the value of 9 is not standard EXIF, but is used by the Canon EOS 7D)
0x9207 MeteringMode 0 = Unknown
1 = Average
2 = Center-weighted average
3 = Spot
4 = Multi-spot
5 = Multi-segment
6 = Partial
255 = Other
0x9209 Flash 0x0 = 0 = No Flash
0x1 = 1 = Fired
0x5 = 5 = Fired, Return not detected
0x7 = 7 = Fired, Return detected
0x8 = 8 = On, Did not fire
0x9 = 9 = On, Fired
0xd = 13 = On, Return not detected
0xf = 15 = On, Return detected
0x10 = 16 = Off, Did not fire
0x14 = 20 = Off, Did not fire, Return not detected
0x18 = 24 = Auto, Did not fire
0x19 = 25 = Auto, Fired
0x1d = 29 = Auto, Fired, Return not detected
0x1f = 31 = Auto, Fired, Return detected
0x20 = 32 = No flash function
0x30 = 48 = Off, No flash function
0x41 = 65 = Fired, Red-eye reduction
0x45 = 69 = Fired, Red-eye reduction, Return not detected
0x47 = 71 = Fired, Red-eye reduction, Return detected
0x49 = 73 = On, Red-eye reduction
0x4d = 77= On, Red-eye reduction, Return not detected
0x4f = 79 = On, Red-eye reduction, Return detected
0x50 = 80 = Off, Red-eye reduction
0x58 = 88 = Auto, Did not fire, Red-eye reduction
0x59 = 89 = Auto, Fired, Red-eye reduction
0x5d = 93 = Auto, Fired, Red-eye reduction, Return not detected
0x5f = 95 = Auto, Fired, Red-eye reduction, Return detected