Codabar is a
barcode symbology similar to
39 (or
3 of 9). The number of possible
characters is much smaller than code 39, but this allows the
pattern for each character to be smaller as well. A codabar character consists of 7
bars and
spaces, a
code 39 character consists of 9. Codabar allows for all
digits, the characters - $ : / . + and the
letters
A B C D. The letters are used as start/stop characters. Like other barcodes, the codabar symbology involves wide and narrow bars separated by wide and narrow spaces.
char bsbsbsb
A nnwwnwn
B nwnwnnw
C nnnwnww
D nnnwwwn
0 nnnnnww
1 nnnnwwn
2 nnnwnnw
3 wwnnnnn
4 nnwnnwn
5 wnnnnwn
6 nwnnnnw
7 nwnnwnn
8 nwwnnnn
9 wnnwnnn
- nnnwwnn
$ nnwwnnn
: wnnnwnw
/ wnwnnnw
. wnwnwnn
+ nnwnwnw
b=bar
s=space
w=wide
n=narrow