Hi Fabrizio,

unfortunately you can't fulltext search all the scholarly articles , you should better work with indexed properties, so

you can query for other articles with microgravity as main subject ... With the ajax based wikidata search 

 

SELECT ?item
WHERE {
    ?item wdt:P31 wd:Q13442814;
          wdt:P921 wd:Q48655.
}

 

Best regards,

 

ciao matthias

 

 

Gesendet: Freitag, 14. Dezember 2018 um 18:55 Uhr
Von: "Fabrizio Carrai" <fabrizio.carrai@gmail.com>
An: "Discussion list for the Wikidata project" <wikidata@lists.wikimedia.org>
Betreff: Re: [Wikidata] Query on scholarly article fails

Thanks again to Ettore, but I immediately found another timeout problem when I just added a FILTER to find all the articles with the word "biokis"  in the title

 

SELECT ?istanza_di ?instanza_diLabel WHERE {

  ?istanza_di wdt:P31 wd:Q13442814.

  ?istanza_di rdfs:label ?instanza_diLabel.

  FILTER((LANG(?instanza_diLabel)) = "en").

  FILTER(CONTAINS(LCASE(?instanza_diLabel), "biokis"))

}

LIMIT 100

 

At least one article should be returned: 

https://www.wikidata.org/wiki/Q57202937

but I got a timeout.

 

Thanks to anybody that can help

 

Fabrizio

 

 

Il giorno ven 14 dic 2018 alle ore 10:12 Ettore RIZZA <ettorerizza@gmail.com> ha scritto:

Hello Fabrizio, 

 

It seems that the problem comes from SERVICE wikibase:label. As said in another discussion, the query executes in less than one second if you rewrite it in this way.

 

Cheers,

 

Ettore Rizza

 

Le ven. 14 déc. 2018 à 09:59, Fabrizio Carrai <fabrizio.carrai@gmail.com> a écrit :

Hello all,

the following query ends with a timeot:

 

SELECT ?istanza_di ?istanza_diLabel WHERE {

  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }

  ?istanza_di wdt:P31 wd:Q13442814.

}

LIMIT 10

 

Can anybody explain why ?

Thanks in advance

 

--

Fabrizio

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