Computer Braille Code: Difference between revisions

Revision as of 09:13, 29 January 2019

Revision as of 20:00, 6 November 2019

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There are two standards of representation of computer code with braille:

1) The '''Computer Braille Code''' as defined by the [[Braille Authority of North America]].<ref>{{cite book|title=Computer Braille Code: 2000 Revision|date=2000|publisher=Braille Authority of North America|url=http://www.brailleauthority.org/cbc/cbc.html}}</ref> However, since January 2016 it is no longer official in the USAUS and replaced by [[Unified English Braille]] (UEB). It employs only the 6-dot braille patterns to represent all code points of [[ASCII]] as well as many technical characters and commands. It is virtually identical to the [[Braille ASCII]], a system of representation of braille with ASCII characters, which goal is mirrored to the Computer Braille Code. To represent ASCII code points 0x60, 0x7B, 0x7C, 0x7D, 0x7E as well as capital letters the 4-5-6 ({{braille cell|456}}) character is used as the shift indicator or modifier. Thus, {{code|`}} (grave accent, 0x60) is represented by {{braille cell|456}}{{braille cell|4}}, where {{braille cell|4}} is assigned to {{code|@}} (at sign, 0x40). In other words, {{braille cell|456}} either adds (for punctuation) or subtracts (for letters) 32 to or from the ASCII value of the following character. Unlike Braille ASCII {{code|_}} (underscore, 0x5F) is represented by {{braille cell|456}}{{braille cell|456}}.

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:* adding dot 7 subtracts 32 from the ASCII value;

:* adding dot 8 adds 128 to the ASCII value;

:* adding dots 7 and 8 adds 96 to the ASCII value.

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{{Braille}}

[[Category:Braille]]