Excellent, I did some tests and with some cycles I already identified and classified several articles.

I will have a look at your script in the  next days but I already have a question: the number of iterations is based on the total number of articles, how do you know that ?

---

Fabrizio

Il giorno sab 15 dic 2018 alle ore 10:18 Egon Willighagen <egon.willighagen@gmail.com> ha scritto:

The approach I use is the following, see this (Bioclipse/Groovy) script: https://gist.github.com/egonw/ca4c348b9a2d1116efcdb55fa85dd158

It takes advantage of a combination Blazegraph SPARQL trick and breaking up thing in batches of a certain size:

SELECT ?art ?artLabel
	WITH {
	SELECT ?art WHERE {
	?art wdt:P31 wd:Q13442814
	} LIMIT $batchSize OFFSET $offset
	} AS %RESULTS {
	INCLUDE %RESULTS
	?art wdt:P1476 ?artLabel .
	MINUS { ?art wdt:P921 wd:$conceptQ }
	FILTER (contains(lcase(str(?artLabel)), "$concept"))
	}

where "$concept" is my search word in the title, and $batchSize and $offset take care of the batching by the script. This script creates QuickStatements. 

Mind you, I manually check the created statements, because in my domain (biochem) a simple search results of false positives, hence the "blacklist" in the script :)

Egon

On Sat, Dec 15, 2018 at 10:13 AM Fabrizio Carrai <fabrizio.carrai@gmail.com> wrote:

Thanks Matthias,

that's a pity. Your suggestion relies on the effective characterization of the item that,  at this writing time, is pretty poor for my interest.

Could it be an idea to download all the "scholary articles", locally select  for the keyword of interest (e.g. "microgravity") and set the property P921 for all of them ? Quickstatements may be helpful for the last step, any suggestions for other tools ? 

Thanks

Fabrizio

Il giorno ven 14 dic 2018 alle ore 22:16 Matthias Erfurth <erfurth@gmx.de> ha scritto:

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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--

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Hi, do you like citation networks? Already 51% of all citations are available available for innovative new uses. Join my in asking the American Chemical Society to join the Initiative for Open Citations too. SpringerNature, the RSC and many others already did.

-----

E.L. Willighagen
Department of Bioinformatics - BiGCaT
Maastricht University (http://www.bigcat.unimaas.nl/)
Homepage: http://egonw.github.com/
Blog: http://chem-bla-ics.blogspot.com/
PubList: https://www.zotero.org/egonw
ORCID: 0000-0001-7542-0286
ImpactStory: https://impactstory.org/u/egonwillighagen

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