Allows X on length of 8 chars
Parameters: | string – The barcode to check for allowed characters |
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Return type: | bool |
Validates the checksum
Parameters: | string – The barcode to check the checksum for |
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Return type: | bool |
Validates the checksum () ISSN implementation (reversed mod11)
Parameters: | string – The barcode to validate |
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Return type: | bool |