Most collating sequence files list all variants of a single letter on one char = line.
A collating sequence that is case sensitive lists uppercase and lowercase variants of a letter in the order in which they are to be sorted and separates them with a comma. For example:
char = 0x41,0x61,0xC0,0xE0,0xC1,0xE1,0xC2,0xE2,0xC3,0xE3
;A, a, A-grave, a-grave, A-acute, a-acute, A-tilde, a-tilde,
;A-diaeresis, a-diaeresis
;
char = 0x42,0x62
;letter B, b
A collating sequence that is not case sensitive lists the uppercase and lowercase variants of a letter in any order and joins them with an equals sign. For example:
char = 0x41=0x61,0xC0=0xE0,0xC1=0xE1,0xC2=0xE2,0xC3=0xE3
;A, a, A-grave, a-grave, A-acute, a-acute, A-tilde, a-tilde,
;A-diaeresis, a-diaeresis
;
char = 0x42=0x62
;letter B, b
