Barcode
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The barcode as printed on the item.
- We do not use this field for other numbers.
- If two barcodes are listed, they are separated with a semi-colon.
- No_barcode is checked if no barcode is present.
- The barcode field can be turned off for a series if no issues have a barcode.
- On the compare page a note will say if the number is a valid barcode according to the UPC and EAN standard. Note that publishers might have used barcodes which do not fulfil these standard, for example Marvel (till 1987) and DC (till July 1988) did use barcodes without the necessary check digit at the end.