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--- modulo43-barcodes [2017/12/22 15:14] – created Gerard Nicol
+++ modulo43-barcodes [2018/08/10 02:33] (current) – removed Scott Cunliffe
@@ Line 1: / Line 1: @@
-=Overview=
-Modulo 43 is an extension of the Code 39 barcode symbology.
-==How it works==
-* Each character of the barcode in turn is looked up in the following string "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%"
-* When the character is found the offset of that character is added to a running total
-* At the end of the string the subtotal is divided by 43
-* The remainder of the division is then looked up in the search string and appended to the barcode
-===Example===
-*The barcode "000000" is made up of zeros. As the zero is character 1 of the search string the subtotal would be 1+1+1+1+1+1=6.
-*The subtotal divided by 43 gives a remainder of 6.
-*Character 6 in the search string is the number 5 character.
-*So a modulo 43 barcode with value "000000" would be "0000005"
-=How TapeTrack caters for Module 43=
-If your tape library consists only of media volumes that use the Modulo 43 check digit the simplest approach would be to create a barcode definition that says (presuming all of your barcodes have 6 digits) the volume serial portion of the barcode is made up of digits 1-6 of what is scanned.
-In reality things are probably not going to be that simple. So if you have some barcodes with Modulo 43 and some without this is how TapeTrack manages them:
-==See Also==
-[[TapeTrack Barcode Parsing]]