Hoi,

What we could do for particular searches is to fallback on other resources that are known to be complete. When we do not find an ISBN, we can fall back to library systems, local libraries preferably.

There are many ways we can make a difference. When we do this for one field of knowledge at a time, it will entice people to do more for their own field.

Thanks,

GerardM

On 9 November 2015 at 10:28, Andrew Gray <andrew.gray@dunelm.org.uk> wrote:

On 9 November 2015 at 08:45, Daniel Kinzler <daniel.kinzler@wikimedia.de> wrote:

>> Also, is this a temporary thing? Will Wikidata eventually have items for every
>> book published, every musical recording, etc. and become a superset of all those
>> unique identifiers?
>
> It's highly unlikely that wikidata will become a superset of any and all
> vocuabularies in existance.

Agree.

*However*, there are some things where we may be able to say with
confidence "Wikidata has a comprehensive set of X" (eg catalogues such
as P1186). It might be worth thinking about whether we should record
these identifier properties as "will always be incomplete", "probably
complete", "expected to eventually be complete", etc. If a user
queries for an ISBN we don't have, the chances are high that it's a
good ISBN we don't cover - but if they query for a country code we
don't have, the chances are high that it's an invalid code...

--
- Andrew Gray
andrew.gray@dunelm.org.uk

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