Re: [Wikidata-tech] WDTK searchEntities

[Moving to wikidata-tech; previous conversation inline below]

Hi Polyglot,

ah, now I see. The Wikidata Toolkit method you call is looking for items by Wikipedia page title, not for items by label. Labels and titles are not related in Wikidata. The search by title is supported by the wbgetentities API action for which we have a wrapper class, but this API action does not support the search by label.

In fact, I am not sure that there is any API action for doing what you want. There is only wbsearchentities, but this search will return near matches and also look for aliases. Maybe this is not a big issue for long strings as in your case, but for shorter strings you would get many results and you would still need to check if they really match.

Anyway, you are right that it would be nice if we would implement support for the label/alias search as well. For this, we need to make a wrapper class for wbsearchentities. I created an issue to track this:

https://github.com/Wikidata/Wikidata-Toolkit/issues/228

Cheers,

Markus

On 13.02.2016 23:22, Jo wrote:

Hi Markus,

I'm searching for a wikidata item with that label. It would be even better if it were possible to search for a label/description combination.

This is the item I'm looking for: https://www.wikidata.org/wiki/Q22695926

I mostly want to make sure that I'm not creating duplicate entries in Wikidata, most of those schools are not noteworthy enough to get an article on Wikipedia, but since they have objects in Openstreetmap, I would think they are interesting enough for Wikidata.

Polyglot

2016-02-13 23:13 GMT+01:00 Markus Krötzsch <markus@semantic-mediawiki.org mailto:markus@semantic-mediawiki.org>:

Hi Jo,

You are searching for an item that is assigned to the article
"Kasega Church of Uganda Primary School" on English Wikipedia.
However, there is not article of this name on English Wikipedia.
Maybe there is a typo? Can you tell me which Wikidata item should be
returned here?

Cheers,

Markus

P.S. If you agree, I would prefer to continue this discussion on
wikidata-tech for the benefit of others who may have similar questions.



On 13.02.2016 14:47, Jo wrote:

    Hi Marcus,

    I had started to write my own implementation of a Wikidata bot in
    Jython, so I could use it in JOSM, but still get to code in
    Python. This
    worked well for a while, but now apparently something was
    changed to the
    login API.

    Anyway, I can't code in all possible things that can go wrong, so it
    makes more sense to reuse an existing framework.

    What I want to do is add items, but I want to check if they already
    exist first. Try as I may, I can't seem to retrieve the items I
    create
    myself, like:


       Kasega Church of Uganda Primary School

    Douglas Adams, on the other hand doesn't pose a problem.


    I can't figure out why this is. Some things can be found, others
    can't.
    I tried with a few more entries from recent changes.


    In my own bot, I had more succes with searchEntities than with
    getEntities. Was this implemented in WDTK?

    I hope you can help, I'm stuck, as it doesn't make a lot of sense to
    continue with the conversion, if I can't even get a trivial
    thing like
    this to work.

    from org.wikidata.wdtk.datamodel.helpers import Datamodel
    from org.wikidata.wdtk.datamodel.helpers import ItemDocumentBuilder
    from org.wikidata.wdtk.datamodel.helpers import ReferenceBuilder
    from org.wikidata.wdtk.datamodel.helpers import StatementBuilder
    from org.wikidata.wdtk.datamodel.interfaces import DatatypeIdValue
    from org.wikidata.wdtk.datamodel.interfaces import EntityDocument
    from org.wikidata.wdtk.datamodel.interfaces import ItemDocument
    from org.wikidata.wdtk.datamodel.interfaces import ItemIdValue
    from org.wikidata.wdtk.datamodel.interfaces import PropertyDocument
    from org.wikidata.wdtk.datamodel.interfaces import PropertyIdValue
    from org.wikidata.wdtk.datamodel.interfaces import Reference
    from org.wikidata.wdtk.datamodel.interfaces import Statement
    from org.wikidata.wdtk.datamodel.interfaces import StatementDocument
    from org.wikidata.wdtk.datamodel.interfaces import StatementGroup
    from org.wikidata.wdtk.wikibaseapi import ApiConnection
    from org.wikidata.wdtk.util import WebResourceFetcherImpl
    from org.wikidata.wdtk.wikibaseapi import ApiConnection
    from org.wikidata.wdtk.wikibaseapi import LoginFailedException
    from org.wikidata.wdtk.wikibaseapi import WikibaseDataEditor
    from org.wikidata.wdtk.wikibaseapi import WikibaseDataFetcher
    from org.wikidata.wdtk.wikibaseapi.apierrors import
    MediaWikiApiErrorException
    # print dir(ItemDocument)
    # print dir(ApiConnection)


    dataFetcher = WikibaseDataFetcher(connection, siteIri)
    # print dir(dataFetcher)
    # itemDocuments =
    dataFetcher.getEntityDocumentsByTitle('enwiki',['Kasega Church
    of Uganda
    Primary School'])
    # itemDocuments = dataFetcher.getEntityDocuments('Q22695926')
    itemDocuments =
    dataFetcher.getEntityDocumentsByTitle('enwiki','Kasega
    Church of Uganda Primary School')
    # print dir(itemDocuments)
    print str(len(itemDocuments)) + ' resulting items'
    print itemDocuments.toString()
    # for itemDocument in itemDocuments:
          # print '=========================='
          # print itemDocument.toString()