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A cell forcing what follows to be read as a letter.
Also known as: Letter sign braille, Braille letter sign
In Unified English Braille the letter indicator forces the following cell to be read as a letter rather than as a digit or a contraction, resolving the ambiguity the number indicator creates.
Forces the following cell to be read as a letter rather than as a digit or a contraction.
Contexts: Language and transcription
Is needed precisely because the number indicator makes letters ambiguous, so one convention creates the problem the other solves.
Contexts: Language and transcription
A cell with dots five and six raised, placed before the character whose reading it fixes.