10.6.6Do not use the lower groupsign for "ea", "bb", "cc", "ff", or "gg"
when the letters it represents are preceded or followed by a capitals
indicator or a capitals terminator. |
10.6.9To prevent it from being misread as "enough", do not use the lower
groupsign for "en" when the letters "en" are "standing alone".
Refer to: Section 2.6, Terminology and General Rules, for the
definition of "standing alone". |
10.6.8Use the lower groupsign for "en" or "in" wherever the letters it
represents occur unless other rules limit its use. |
10.6.7Do not use the lower groupsign for "ea" when the letters "ea" bridge
a prefix and the remainder of the word. |
1.1.1Braille is a tactile method of reading and writing for blind people developed by Louis Braille (1809-1852), a blind Frenchman. The braille system uses six raised dots in a systematic arrangement with two columns of three dots, known as a braille cell. By convention, the dots in the left column are numbered 1, 2 and 3 from top to bottom and the dots in the right column are numbered 4, 5 and 6 from top to bottom. |
16.1.1Use line mode when it is advantageous to draw "lines" using standard
braille cells. Line mode enables regular text and diagrammatic lines
to coexist without ambiguity, even within the same diagram.
Refer to: Section 7, Punctuation, for the hyphen, dash, long dash
and low line; Guidelines for Technical Material, Part 4, for the lines in
spatial calculations and other technical diagrams; and Part 16.7, for
the lines and bonds in structural formulae used in chemistry. |
16.1.2Use line mode for features such as lines separating column headings
from items in the column and for horizontal lines before and after
text set apart in boxes. |
1.1.2The six dots of the braille cell are configured in 64 possible combinations (including the space which has no dots present). The 63 braille characters with dots are grouped in a table of seven lines. This table is used to establish "braille order" for listing braille signs. Line 1 is formed with characters in the upper part of the cell, using dots 1, 2, 4 and 5.
Line 2 adds dot 3 to each of the characters in Line 1.
Line 3 adds dots 3 and 6 to each of the characters in Line 1.
Line 4 adds dot 6 to each of the characters in Line 1.
Line 5 repeats the dot configurations of Line 1 in the lower part of the cell, using dots 2, 3, 5 and 6. Line 6 is formed with characters using dots 3, 4, 5 and 6.
Line 7 is formed with characters in the right column of the cell, using dots 4, 5 and 6.
|
16.1.3Do not use line mode when the attributes of the lines or their
relationship with one another is important, such as in the study of
geometry or the measurement of angles. |
16.1.4Do not use line mode when the diagram would be too complex to be
read by touch. |