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--- modulo43-barcodes [2018/01/15 23:49] – Scott Cunliffe
+++ modulo43-barcodes [2018/08/10 02:33] (current) – removed Scott Cunliffe
@@ Line 1: / Line 1: @@
-====== Modulo 43 Barcodes ======
-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-. $/+%"
-  * When the character is found the offset of that character is added to a running total
-  * At the end of the string the subtotal is divided by 43
-  * The offset of the remainder of the division is then looked up in the search string and appended to the barcode
-|00|0||11|B||22|M||33|X|
-|01|1||12|C||23|N||34|Y|
-|02|2||13|D||24|O||35|Z|
-|03|3||14|E||25|P||36|-|
-|04|4||15|F||26|Q||37|.|
-|05|5||16|G||27|R||38|space|
-|06|6||17|H||28|S||39|$|
-|07|7||18|I||29|T||40|/|
-|08|8||19|J||30|U||41|+|
-|09|9||20|K||31|V||42|%|
-|10|10||21|L||32|W|||
-=== 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===
-[[barcode-processing|TapeTrack Barcode Parsing]]