GS1 (Globe Standard 1) DataBar
GS1 DataBar Limited
GS1 DataBar Limited Security Level
The decoder offers four levels of decode security for GS1 DataBar Limited
barcodes. There is an inverse relationship between security and decoder
aggressiveness. Increasing the level of security may result in reduced
aggressiveness in scanning, so only choose the level of security necessary.
Level 1 – No clear margin required. This complies with the original GS1
standard, yet might result in erroneous1 decoding of the DataBar Limited
barcode when scanning some UPC symbols that start with the digits “9” and “7”.
Level 2 – Automatic risk detection. This level of security may result in erroneous
decoding of DataBar Limited barcodes when scanning some UPC symbols. If a
misdecode is detected, the decoder operates in Level 3 or Level 1.
Level 3 – Security level reflects newly proposed GS1 standard that requires a
5X trailing clear margin.
Level 4 – Security level extends beyond the standard required by GS1. This
level of security requires a 5X leading and trailing clear margin.
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