Note: In this and future lessons there will necessarily be references to rules in Braille Formats: Principles of Print to Braille Transcription on subjects not addressed in EBAE. While studying Braille Formats you may encounter inconsistencies between rules in the two books. These inconsistencies are under study by BANA technical committees. Unless otherwise stated, when in doubt follow the rules as set forth in EBAE and this manual when preparing lessons or a certification manuscript.
The letter sign (dots 5-6), also known as the letter indicator, is a composition sign like the capital sign and the number sign. It is used to indicate that a letter or letter grouping has a letter meaning, and is not a whole-word contraction or a short-form word. Thus, the letter d standing alone has the whole word meaning do, but if a letter sign precedes it, it is read as the letter d. The letter sign is also used to differentiate between letters and numbers and with roman numerals (to be studied later).