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theducks · 02-06-2021, 11:12 AM

I had a bit of discussion over at Kiwidude's ISBN PI years ago as I had done a home grown POS to sell books.

The first grouping in ISBN(10) is Language. 0 being English
I use the term 'Grouping' as the only fixed part of an ISBN10 is the check digit
Language-Publisher-book number-check digit

BPH's have very low Publisher # and lots of book numbers. OTOH Vanity Presses may have only a single digit book number.

EAN assigned 978,979 to be compatible with retail assignments (the starting digits have additional meaning and made up counterfeits in commerce streams cause all sorts of grief)

02-06-2021, 11:12 AM	#12
theducks Well trained by Cats Posts: 31,149 Karma: 60406498 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	I had a bit of discussion over at Kiwidude's ISBN PI years ago as I had done a home grown POS to sell books. The first grouping in ISBN(10) is Language. 0 being English I use the term 'Grouping' as the only fixed part of an ISBN10 is the check digit Language-Publisher-book number-check digit BPH's have very low Publisher # and lots of book numbers. OTOH Vanity Presses may have only a single digit book number. EAN assigned 978,979 to be compatible with retail assignments (the starting digits have additional meaning and made up counterfeits in commerce streams cause all sorts of grief)