My question divided to three questions:
You can find information about OpenKM barcode reader at https://www.openkm.com/en/barcode.html also I suggest take a look at this video what might ilustrate the idea behing it https://www.youtube.com/watch?time_continue=1&v=TkYS33I88oU
By default OpenKM comes with a barcode engine, but might integrate commercial solution into.
You can use the search engine to find a document with some barcode, query can be done to content or metadata.
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You can find information about OpenKM barcode reader at https://www.openkm.com/en/barcode.html also I suggest take a look at this video what might ilustrate the idea behing it https://www.youtube.com/watch?time_continue=1&v=TkYS33I88oU
By default OpenKM comes with a barcode engine, but might integrate commercial solution into.
You can use the search engine to find a document with some barcode, query can be done to content or metadata.