Feedback

Share, discover and reuse the Linked Data has never been easier with a LinkedWiki Platform.

Reuse these data in your code

Query, endpoint and code for reusing the same data
https://query.wikidata.org/sparql
PREFIX bd: <http://www.bigdata.com/rdf#> 
PREFIX wikibase: <http://wikiba.se/ontology#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX wd: <http://www.wikidata.org/entity/> 
PREFIX wdt: <http://www.wikidata.org/prop/direct/> 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels)
      (group_concat(distinct ?author_label; separator=", ") as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=", ") as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = "en")
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = "en")
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = "en") }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)
Howto write a query SPARQL? (in French)
{{#sparql:PREFIX bd: <http://www.bigdata.com/rdf#> 
PREFIX wikibase: <http://wikiba.se/ontology#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX wd: <http://www.wikidata.org/entity/> 
PREFIX wdt: <http://www.wikidata.org/prop/direct/> 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels)
      (group_concat(distinct ?author_label; separator=", ") as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=", ") as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = "en")
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = "en")
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = "en") }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)
| endpoint = https://query.wikidata.org/sparql
| chart=bordercloud.visualization.DataTable
| options=
| log=2
}}
Howto install LinkedWiki in my wiki? Howto insert this graph in my wiki?
Test this script in a new tab.
<html>
    <head>
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"  async></script>
    </head>
    <body onload="testQuery();">
        <script>
function testQuery(){
    var endpoint = "https://query.wikidata.org/sparql";
    var query = "PREFIX bd: <http://www.bigdata.com/rdf#> \n\
PREFIX wikibase: <http://wikiba.se/ontology#> \n\
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> \n\
PREFIX wd: <http://www.wikidata.org/entity/> \n\
PREFIX wdt: <http://www.wikidata.org/prop/direct/> \n\
\n\
select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text\n\
where {\n\
  {\n\
    select\n\
      ?paper \n\
       ?paper_label \n\
      (group_concat(distinct ?classes_label; separator=\", \") as ?class_labels)\n\
      (group_concat(distinct ?author_label; separator=\", \") as ?authors)\n\
      (sample(?published_ins) as ?venue)\n\
      (group_concat(distinct ?topic_label; separator=\", \") as ?topics)\n\
      (min(?dates_of_publication) as ?date)\n\
      (sample(?full_texts) as ?full_text)\n\
    where {\n\
      { ?paper wdt:P921 wd:Q52 } # Wikipedia\n\
      union { ?paper wdt:P921 wd:Q195951 } # reliability\n\
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia\n\
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian\n\
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia\n\
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata\n\
      \n\
      optional {\n\
        ?paper wdt:P31 ?classes .\n\
        ?classes rdfs:label ?classes_label .\n\
        filter (lang(?classes_label) = \"en\")\n\
      }\n\
      optional {\n\
        ?paper  rdfs:label ?paper_label .\n\
        filter (lang(?paper_label) = \"en\")\n\
      }\n\
      \n\
      { ?paper wdt:P921 ?topic . }\n\
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = \"en\") } \n\
    \n\
      optional {\n\
        ?paper wdt:P50 ?author .\n\
        ?author rdfs:label ?author_label .\n\
        filter (lang(?author_label) = \"en\") }\n\
      \n\
      optional { ?paper wdt:P1433 ?published_ins }\n\
      optional { ?paper wdt:P577 ?dates_of_publication }\n\
      optional { ?paper wdt:P953 ?full_texts }\n\
     \n\
     } \n\
     group by ?paper ?paper_label\n\
  }\n\
 \n\
}\n\
order by desc(?date)"

   // $('#bodyContentResearch').append(queryDataset);
    $.ajax({
                url: endpoint,
                dataType: 'json',
                data: {
                    queryLn: 'SPARQL',
                    query: query ,
                    limit: 'none',
                    infer: 'true',
                    Accept: 'application/sparql-results+json'
                },
                success: displayResult,
                error: displayError
        });
}

function displayError(xhr, textStatus, errorThrown) {
    console.log(textStatus);
    console.log(errorThrown);
}

function displayResult(data) {
    $.each(data.results.bindings, function(index, bs) {
        console.log(bs);
        $("body").append(JSON.stringify(bs) + "<hr/>");
    });
}

        </script>
    </body>
</html>
Test this script in a new tab (Careful, several charts need a API key).
Howto insert this graph in my html page?
<html>
    <head>
     <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css">

     <script
            src="https://code.jquery.com/jquery-3.4.1.min.js"
            integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
            crossorigin="anonymous"> </script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"> </script>
     <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"> </script>

     <script type="text/javascript" src="https://bordercloud.github.io/sgvizler2/sgvizler2/sgvizler2.js" defer> </script>
     <script type="text/javascript" src="http://linkedwiki.com/js/initExampleHTML.js"  defer > </script>
    </head>
<body style="margin:0;">
<div id="sgvzl_example_query"
   data-sgvizler-endpoint="https://query.wikidata.org/sparql"
   data-sgvizler-query="PREFIX bd: &lt;http://www.bigdata.com/rdf#&gt; 
PREFIX wikibase: &lt;http://wikiba.se/ontology#&gt; 
PREFIX rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt; 
PREFIX wd: &lt;http://www.wikidata.org/entity/&gt; 
PREFIX wdt: &lt;http://www.wikidata.org/prop/direct/&gt; 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=&quot;, &quot;) as ?class_labels)
      (group_concat(distinct ?author_label; separator=&quot;, &quot;) as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=&quot;, &quot;) as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = &quot;en&quot;)
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = &quot;en&quot;)
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = &quot;en&quot;) } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = &quot;en&quot;) }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)"
    data-sgvizler-chart='bordercloud.visualization.DataTable'
    data-sgvizler-chart-options=''
    data-sgvizler-endpoint_output_format='json'
    data-sgvizler-log='2'
    style='width:100%; height:auto;'  />

<script>
/*$(function() {
   sgvizler2.containerDrawAll({
       // Google Api key
       googleApiKey : "GOOGLE_MAP_API_KEY",
       // OpenStreetMap Access Token
       //  https://www.mapbox.com/api-documentation/#access-tokens
       osmAccessToken : "OSM_MAP_API_KEY"
     });
});*/
</script>

</body>
</html>
from SPARQLWrapper import SPARQLWrapper, JSON

sparql = SPARQLWrapper("https://query.wikidata.org/sparql")
sparql.setQuery("""
    PREFIX bd: <http://www.bigdata.com/rdf#> 
PREFIX wikibase: <http://wikiba.se/ontology#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX wd: <http://www.wikidata.org/entity/> 
PREFIX wdt: <http://www.wikidata.org/prop/direct/> 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels)
      (group_concat(distinct ?author_label; separator=", ") as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=", ") as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = "en")
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = "en")
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = "en") }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)""")
sparql.setReturnFormat(JSON)
results = sparql.query().convert()

for result in results["results"]["bindings"]:
    print(result)
    #print(result["label"]["value"])
Howto use SPARQL with Python ?
library(SPARQL) # SPARQL querying package
library(ggplot2)

# Step 1 - Set up preliminaries and define query
# Define the data.gov endpoint
    endpoint <- "https://query.wikidata.org/sparql"
# create query statement
    query <- "PREFIX bd: <http://www.bigdata.com/rdf#> 
PREFIX wikibase: <http://wikiba.se/ontology#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX wd: <http://www.wikidata.org/entity/> 
PREFIX wdt: <http://www.wikidata.org/prop/direct/> 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels)
      (group_concat(distinct ?author_label; separator=", ") as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=", ") as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = "en")
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = "en")
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = "en") }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)"
# Step 2 - Use SPARQL package to submit query and save results to a data frame
qd <- SPARQL(endpoint,query)
df <- qd$results
SPARQL with R in less than 5 minutes
#!/usr/bin/env ruby
#
# Install sparql for Ruby
#   gem update --system
#   gem install sparql
#
require 'sparql/client'

endpoint = "https://query.wikidata.org/sparql"
sparql = <<-EOT
PREFIX bd: <http://www.bigdata.com/rdf#> 
PREFIX wikibase: <http://wikiba.se/ontology#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX wd: <http://www.wikidata.org/entity/> 
PREFIX wdt: <http://www.wikidata.org/prop/direct/> 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels)
      (group_concat(distinct ?author_label; separator=", ") as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=", ") as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = "en")
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = "en")
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = "en") }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)
EOT

#For Wikidata, the method get is required
#For other SPARQL endpoints, the method post is prefered
client = SPARQL::Client.new(endpoint, :method => :get)
rows = client.query(sparql)

puts "Number of rows: #{rows.size}"
for row in rows
  for key,val in row do
    # print "#{key.to_s.ljust(10)}: #{val}\t"
    print "#{key}: #{val}\t"
  end
  print "\n"
end
Doc Ruby for SPARQL 1.1
endpoint = 'https://query.wikidata.org/sparql';

query = ['PREFIX bd: <http://www.bigdata.com/rdf#>  '...
'PREFIX wikibase: <http://wikiba.se/ontology#>  '...
'PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>  '...
'PREFIX wd: <http://www.wikidata.org/entity/>  '...
'PREFIX wdt: <http://www.wikidata.org/prop/direct/>  '...
' '...
'select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text '...
'where { '...
'  { '...
'    select '...
'      ?paper  '...
'       ?paper_label  '...
'      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels) '...
'      (group_concat(distinct ?author_label; separator=", ") as ?authors) '...
'      (sample(?published_ins) as ?venue) '...
'      (group_concat(distinct ?topic_label; separator=", ") as ?topics) '...
'      (min(?dates_of_publication) as ?date) '...
'      (sample(?full_texts) as ?full_text) '...
'    where { '...
'      { ?paper wdt:P921 wd:Q52 } # Wikipedia '...
'      union { ?paper wdt:P921 wd:Q195951 } # reliability '...
'      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia '...
'      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian '...
'      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia '...
'      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata '...
'       '...
'      optional { '...
'        ?paper wdt:P31 ?classes . '...
'        ?classes rdfs:label ?classes_label . '...
'        filter (lang(?classes_label) = "en") '...
'      } '...
'      optional { '...
'        ?paper  rdfs:label ?paper_label . '...
'        filter (lang(?paper_label) = "en") '...
'      } '...
'       '...
'      { ?paper wdt:P921 ?topic . } '...
'      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") }  '...
'     '...
'      optional { '...
'        ?paper wdt:P50 ?author . '...
'        ?author rdfs:label ?author_label . '...
'        filter (lang(?author_label) = "en") } '...
'       '...
'      optional { ?paper wdt:P1433 ?published_ins } '...
'      optional { ?paper wdt:P577 ?dates_of_publication } '...
'      optional { ?paper wdt:P953 ?full_texts } '...
'      '...
'     }  '...
'     group by ?paper ?paper_label '...
'  } '...
'  '...
'} '...
'order by desc(?date) '];

url_head = strcat(endpoint,'?query=');
url_query = urlencode(query);
format = 'text/tab-separated-values';
url_tail = strcat('&format=', format);

url = strcat(url_head, url_query, url_tail);

% get the data from the endpoint
query_results = urlread(url);

% write the data to a file so that tdfread can parse it
fid = fopen('query_results.txt','w');
if fid>=0
    fprintf(fid, '%s\n', query_results)
    fclose(fid)
end

% this reads the tsv file into a struct
sparql_data = tdfread('query_results.txt')
Project Github MatlabSPARQL
<?php
require __DIR__ . '/../vendor/autoload.php';
use BorderCloud\SPARQL\SparqlClient;

$endpoint ="https://query.wikidata.org/sparql";
$sp_readonly = new SparqlClient();
$sp_readonly->setEndpointRead($endpoint);
$q = <<<EOD
PREFIX bd: <http://www.bigdata.com/rdf#> 
PREFIX wikibase: <http://wikiba.se/ontology#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX wd: <http://www.wikidata.org/entity/> 
PREFIX wdt: <http://www.wikidata.org/prop/direct/> 

select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text
where {
  {
    select
      ?paper 
       ?paper_label 
      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels)
      (group_concat(distinct ?author_label; separator=", ") as ?authors)
      (sample(?published_ins) as ?venue)
      (group_concat(distinct ?topic_label; separator=", ") as ?topics)
      (min(?dates_of_publication) as ?date)
      (sample(?full_texts) as ?full_text)
    where {
      { ?paper wdt:P921 wd:Q52 } # Wikipedia
      union { ?paper wdt:P921 wd:Q195951 } # reliability
      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia
      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian
      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia
      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata
      
      optional {
        ?paper wdt:P31 ?classes .
        ?classes rdfs:label ?classes_label .
        filter (lang(?classes_label) = "en")
      }
      optional {
        ?paper  rdfs:label ?paper_label .
        filter (lang(?paper_label) = "en")
      }
      
      { ?paper wdt:P921 ?topic . }
      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") } 
    
      optional {
        ?paper wdt:P50 ?author .
        ?author rdfs:label ?author_label .
        filter (lang(?author_label) = "en") }
      
      optional { ?paper wdt:P1433 ?published_ins }
      optional { ?paper wdt:P577 ?dates_of_publication }
      optional { ?paper wdt:P953 ?full_texts }
     
     } 
     group by ?paper ?paper_label
  }
 
}
order by desc(?date)EOD;
$rows = $sp_readonly->query($q, 'rows');
$err = $sp_readonly->getErrors();
if ($err) {
      print_r($err);
      throw new Exception(print_r($err,true));
}

foreach($rows["result"]["variables"] as $variable){
        printf("%-20.20s",$variable);
        echo '|';
 }
 echo "\n";

foreach ($rows["result"]["rows"] as $row){
        foreach($rows["result"]["variables"] as $variable){
                printf("%-20.20s",$row[$variable]);
        echo '|';
        }
        echo "\n";
 }
 ?>
Project Github BorderCloud/SPARQL
import com.bordercloud.sparql.Endpoint;
import java.util.ArrayList;
import java.util.HashMap;

public class Main {

    public static void main(String[] args) {
        try {
            Endpoint sp = new Endpoint("https://query.wikidata.org/sparql";, false);

            String querySelect = 'PREFIX bd: <http://www.bigdata.com/rdf#>  \n'
                    + 'PREFIX wikibase: <http://wikiba.se/ontology#>  \n'
                    + 'PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>  \n'
                    + 'PREFIX wd: <http://www.wikidata.org/entity/>  \n'
                    + 'PREFIX wdt: <http://www.wikidata.org/prop/direct/>  \n'
                    + ' \n'
                    + 'select ?paper ?paper_label ?class_labels ?authors ?venueLabel ?topics ?date ?full_text \n'
                    + 'where { \n'
                    + '  { \n'
                    + '    select \n'
                    + '      ?paper  \n'
                    + '       ?paper_label  \n'
                    + '      (group_concat(distinct ?classes_label; separator=", ") as ?class_labels) \n'
                    + '      (group_concat(distinct ?author_label; separator=", ") as ?authors) \n'
                    + '      (sample(?published_ins) as ?venue) \n'
                    + '      (group_concat(distinct ?topic_label; separator=", ") as ?topics) \n'
                    + '      (min(?dates_of_publication) as ?date) \n'
                    + '      (sample(?full_texts) as ?full_text) \n'
                    + '    where { \n'
                    + '      { ?paper wdt:P921 wd:Q52 } # Wikipedia \n'
                    + '      union { ?paper wdt:P921 wd:Q195951 } # reliability \n'
                    + '      union { ?paper wdt:P921 wd:Q870337 } # academic studies about Wikipedia \n'
                    + '      union { ?paper wdt:P921 wd:Q23038345 } # Wikipedian \n'
                    + '      union { ?paper wdt:P921 ?wiki . ?wiki wdt:P31 wd:Q10876391 } # Language-version Wikipedia \n'
                    + '      union { ?paper wdt:P921 wd:Q2013 }  # Wikidata \n'
                    + '       \n'
                    + '      optional { \n'
                    + '        ?paper wdt:P31 ?classes . \n'
                    + '        ?classes rdfs:label ?classes_label . \n'
                    + '        filter (lang(?classes_label) = "en") \n'
                    + '      } \n'
                    + '      optional { \n'
                    + '        ?paper  rdfs:label ?paper_label . \n'
                    + '        filter (lang(?paper_label) = "en") \n'
                    + '      } \n'
                    + '       \n'
                    + '      { ?paper wdt:P921 ?topic . } \n'
                    + '      optional { ?topic rdfs:label ?topic_label . filter (lang(?topic_label) = "en") }  \n'
                    + '     \n'
                    + '      optional { \n'
                    + '        ?paper wdt:P50 ?author . \n'
                    + '        ?author rdfs:label ?author_label . \n'
                    + '        filter (lang(?author_label) = "en") } \n'
                    + '       \n'
                    + '      optional { ?paper wdt:P1433 ?published_ins } \n'
                    + '      optional { ?paper wdt:P577 ?dates_of_publication } \n'
                    + '      optional { ?paper wdt:P953 ?full_texts } \n'
                    + '      \n'
                    + '     }  \n'
                    + '     group by ?paper ?paper_label \n'
                    + '  } \n'
                    + '  \n'
                    + '} \n'
                    + 'order by desc(?date) \n';

            HashMap rs = sp.query(querySelect);
            printResult(rs,30);

        }catch(EndpointException eex) {
            System.out.println(eex);
            eex.printStackTrace();
        }
    }

    public static void printResult(HashMap rs , int size) {

      for (String variable : (ArrayList) rs.get("result").get("variables")) {
        System.out.print(String.format("%-"+size+"."+size+"s", variable ) + " | ");
      }
      System.out.print("\n");
      for (HashMap value : (ArrayList>) rs.get("result").get("rows")) {
        //System.out.print(value);
        /* for (String key : value.keySet()) {
         System.out.println(value.get(key));
         }*/
        for (String variable : (ArrayList) rs.get("result").get("variables")) {
          //System.out.println(value.get(variable));
          System.out.print(String.format("%-"+size+"."+size+"s", value.get(variable)) + " | ");
        }
        System.out.print("\n");
      }
    }
}
Project Github BorderCloud/SPARQL-JAVA
Very soon !
TODO