A barcode or symbol using a checking algorithm which can be independently applied to each character to guard against undetected errors.
denoting a bar code system using a checking algorithm.
When a barcode symbology is designed to check itself so that one character cannot be read as another, and if when scanned the barcode does not meet a preset value it is rejected. A barcode is considered self-checking if a single defect will not cause a character to be misinterpreted.