There is no need to re-engineer host applications if you want to use barcodes. The EscapeE barcode plug-in will work with any PCL/HPGL print file. Just mark-up the fields containing the barcode data and EscapeE will rewrite the document complete with the barcode ready for printing.
Interleaved 2 of 5 will only code digits. Each digit is encoded as two wide bars in a pattern of 5 bars. The system interleaves the coding for pairs of digits by using the (white) spacing pattern between black bars to encode the value of the second digit of each pair. The width of the black bars signals the value of the first digit of each pair.
The barcode can be rotated.
If required, the encoded text can be removed from the completed document to protect sensitive data.