A list of valid values for the 'encoding_id' for TT_PLATFORM_APPLE_UNICODE charmaps and name entries.
TT_APPLE_ID_DEFAULT
Unicode version 1.0.
TT_APPLE_ID_UNICODE_1_1
Unicode 1.1; specifies Hangul characters starting at U+34xx.
TT_APPLE_ID_ISO_10646
Deprecated (identical to preceding).
TT_APPLE_ID_UNICODE_2_0
Unicode 2.0 and beyond (UTF-16 BMP only).
TT_APPLE_ID_UNICODE_32
Unicode 3.1 and beyond, using UTF-32.
TT_APPLE_ID_VARIANT_SELECTOR
From Adobe, not Apple. Not a normal cmap. Specifies variations on a real cmap.