Codabar is a discrete, width-modulated barcode that can encode digits 0 to 9, plus six special characters: '$' (dollar sign), '-' (dash), ':' (colon), '/' (slash), '.' (period), and '+' (plus). There are also start/stop characters A, B, C, and D.
Besides the parameters common to all stylesheets, this barcode generator allows you to select start/stop symbols. There is no checksum for this barcode.