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https://issues.apache.org/jira/browse/VALIDATOR-447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16595057#comment-16595057
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Alex commented on VALIDATOR-447:
--------------------------------
thanks again for the feedback. I think I broadly agree. I am not suggesting
that we should try and validate against actual publications and actual
allocated ISBNs. Validating ISBNs that are not in a range that is allocted to
ISBNs is more the issue generally. This could probably be disclaimed in the
javadocs (what is being validated is ean13s with 978 and 979 prefixes).
On the ISMN issue, which is probably more misleading (eg 979-0-2600-0043-8), a
lightweight solution would be to add a isISMN method that applies additional
validation to confirm if the item is an ISMN (rather than an ISBN)
> ISBN style numbers outside ISBN range returning true for isValid
> ----------------------------------------------------------------
>
> Key: VALIDATOR-447
> URL: https://issues.apache.org/jira/browse/VALIDATOR-447
> Project: Commons Validator
> Issue Type: Improvement
> Components: Routines
> Reporter: Alex
> Priority: Major
> Labels: validators
> Attachments: RangeMessage.xml
>
>
> All 13 digit EANs with the 979 prefix are validating as ISBNs
> (ISBNValidator). There are 2 issues with this.
> # 979-0 prefixed numbers are allocated to the ISMN agency and represent
> music works. [https://www.ismn-international.org/whatis.html]
> # 979-[2-9] are unassigned at present, that is they have not yet been
> allocated to a country agency (or another authority).
> see attached xml (from
> [www.isbn-international.org/export_rangemessage.xml|http://www.isbn-international.org/export_rangemessage.xml]
> [^RangeMessage.xml] ) for the current valid ranges for ISBN
> and
> [https://en.wikipedia.org/wiki/List_of_ISBN_identifier_groups#Identifiers_of_the_979-_prefix]
> An example unassigned 'ISBN' is 9792222222223
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