You could pass several ISBNs to wdq with OR (but I don't know if it will
support 100 ISBNs in one go):

https://wdq.wmflabs.org/api?q=string%5B957:%222-7071-1620-3%22%5D%20OR%20STRING[957:%222-7071-1562-2%22]


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2015-11-09 3:26 GMT+01:00 S Page <[email protected]>:

> In the article "Presenting Wikidata knowledge" [1], I've Been a bit Bold
> and specified a recipe:
>
> 1. Find existing interesting wiki pages in the domain of your application.
> 2. View the Wikidata information for those pages, choose interesting
> properties.
> 3. Associate Wikidata entity IDs with entities of your application.
> 4. Display their Wikidata information in the user's language.
> 5. Use the Wikidata "sitelinks" information about the item to provide
> links to the full Wikipedia (and Wikiquote, Wikivoyage, etc.) article about
> the entity in the user's language.
>
> But I realize for something like a reference app there won't be Wikidata
> items for every entity in your app for step 3: not every book in print has
> a Wikidata item, nor does every musical recording, etc. For those there are
> already identifiers such as ISBNs and "MusicBrainz release group ID"s (mmm,
> brains). I assume reference app developers already use these more complete
> identifiers and so I'm inviting them to add Wikidata entity IDs where
> available.
>
> I think these other identifiers are all "Wikidata property representing a
> unique identifier" and there are about 350 of them [2] But surprisingly, I
> couldn't find an easy way to look up a Wikidata item using these other
> identifiers.
>
> I found you can do it one-by-one in Wikidata Query [3] and in Wikidata
> Query Serivce [4] but neither seems amenable to doing a query on the fly
> "Get me the Wikidata item for each of these 100 ISBNs "2-7071-1620-3", ...
>
> 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?
>
> Thanks!
>
> [1] https://www.mediawiki.org/wiki/API:Presenting_Wikidata_knowledge
> [2]
> https://www.wikidata.org/wiki/Special:WhatLinksHere/Q19847637?limit=500
> [2] https://wdq.wmflabs.org/api?q=string%5B957:"2-7071-1620-3"%5D and
> [3] https://query.wikidata.org with the the SPARQL (mmm, sparkly)
> PREFIX wdt: <http://www.wikidata.org/prop/direct/>
>
> SELECT ?book WHERE {
>    ?book  wdt:P957 "2-7071-1620-3"
> }
>
> --
> =S Page  WMF Tech writer
>
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