Valid ISBN ?

[José Marcio Martins da Cruz]

It's OK for me.

Thanks Robby

On 8/5/21 2:32 AM, Robby Stephenson wrote:
> 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 <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 <mailto: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
>