Grade 1 GS Symbols and Syntax
The WWW is not an ideal medium for providing detailed information
about braille. The symbols felt by Braille readers on a refreshable
braille display depend on the coding table of the display. For the
moment, we are forced to be content with a description that gives the
dot numbers for each building block. In technical discussions about six-dot braille, the upper left dot is
denoted dot-1, the dot below it is dot-2, and the lower left dot is
dot-3. The upper right dot is dot-4, the one below it is dot-5, and
the lower right dot is dot-6. For eight-dot braille cells the same
convention is used for the uper six dots. The dot on the lower left
is denoted dot-7, and the lower right dot is dot-8.
GS notation is modeled on the powerful, well-tested page layout
language TeX. It includes all syntactical elements of TeX, most
common symbols, and a prescription for adding new exotic symbols and
on-line graphic elements as the need arises.
The most common GS building blocks are those that are
single cells in
GS8 and either single or double cells in GS6. We
have grouped these
simple building blocks into the following
categories and described
their dot patterns in the linked pages.
The second set, whose meaning is related to the shape of the cell
pattern is used for some set theory symbols and some symbols used in
basic geometry. They are given at the end of the list.
Go to Braille Index