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  2. Dec 19, 2017 · I am trying to install wikidata-query-rdf ( https://github.com/wikimedia/wikidata-query-rdf) and there is a failure with Blazegraph : git clone https://gerrit.wikimedia.org/r/wikidata/query/rdf wikidata-query-rdf. cd wikidata-query-rdf. sudo mvn install. I first get this kind of warning : [WARNING] The POM for com.blazegraph:bigdata-cache:jar:2 ...

  3. Jan 29, 2020 · Wikidata is a collaboratively edited knowledge base. It is a source of open data that you may want to use in your projects. Wikidata offers a query service for integrations. The query service can be accessed by navigating to query.wikidata.org If we go there, we’ll see the following screen: Figure 2.

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  5. Mar 8, 2024 · WDQS, the Wikidata Query Service, is a powerful tool to provide insight into Wikidata's content. This guide will teach you how to use it. See also the interactive tutorial by Wikimedia Israel.

    • Overview
    • Usage
    • Links for learning SPARQL
    • Additional Information

    •Installation

    •Usage

    •Example: fetching genres of a particular movie

    •Fetching queries from Wikidata’s examples page

    •Links for learning SPARQL

    •Additional Information

    Example: fetching genres of a particular movie

    In this example, we find an “instance of” (P31) “film” (Q11424) that has the label “The Cabin in the Woods” (Q45394), get its genres (P136), and then use WDQS label service to return the genre labels. For more example SPARQL queries, see this page on Wikidata. query_wikidata() can accept multiple queries, returning a (potentially named) list of data frames. If the vector of SPARQL queries is named, the results will inherit those names.

    •A beginner-friendly course for SPARQL

    •Building a SPARQL query: Museums on Instagram

    •SPARQL Query Examples for WDQS

    •Using SPARQL to access Linked Open Data by Matthew Lincoln

    •Interesting or illustrative SPARQL queries for Wikidata

    •Wikidata 2016 SPARQL Workshop

    Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.

  6. Jul 2, 2020 · Installation. install.packages("WikidataQueryServiceR") To install the development version: # install.packages("remotes") remotes::install_github("bearloga/WikidataQueryServiceR") Usage. library(WikidataQueryServiceR) ## See ?WDQS for resources on Wikidata Query Service and SPARQL. You submit SPARQL queries using the query_wikidata() function.

  7. Mar 3, 2024 · Update https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/Copyright If it was requested on https://www.wikidata.org/wiki/Wikidata:SPARQL_federation_input , move request to archive Check https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/Federation_report for signs of trouble periodically.

  8. Installation. install.packages("WikidataQueryServiceR") To install the development version: # install.packages("remotes") remotes::install_github("bearloga/WikidataQueryServiceR") Usage. library(WikidataQueryServiceR) ## See ?WDQS for resources on Wikidata Query Service and SPARQL. You submit SPARQL queries using the query_wikidata() function.

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