Valid ISBN ?

[Robby Stephenson]

Historically, ISBN values had 10 characters. To be consistent with EANs,
going forward 13 characters can be used, by using a 978 prefix and the old
10 digits (minus the last checksum characters). The 979 prefix is the other
"bookland" value. Until now, I hadn't actually known they were in
circulation yet.
https://www.isbn.org/about_ISBN_standard

Tellico should handle them appropriately (whether 10 or 13 characters) and
whether starting with 978 or 979. Let me know if it doesn't.

Robby

On Wed, Aug 4, 2021 at 9:52 AM José Marcio Martins da Cruz <
jose.marcio.mc at gmail.com> wrote:

>
> Hello,
>
> I've got a book with a ISBN number which seems to me invalid.
>
> I tried to find if there was a recent change in ISBN naming rules, but
> found nothing.
>
> Is someone can give me a clue ...
>
> The number is 9798717287746
>
> 97987 doesn't seems to me a valid prefix.
>
> Best regards
>
> José-Marcio
>
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