Feedback

Creating synergies and interactions among the analysts and the “producers” of data. See details.

People who were born in Berlin before 1900
People who were born in Berlin before 1900 with DBpedia

Reuse these data in your code

Query, endpoint and code for reusing the same data
http://dbpedia.org/sparql
PREFIX db: <http://dbpedia.org/resource/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth < "1900-01-01"^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100
Howto write a query SPARQL? (in french)
{{#sparql:PREFIX db: <http://dbpedia.org/resource/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth < "1900-01-01"^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100
| endpoint = http://dbpedia.org/sparql }}
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/2.1.4/jquery.min.js"></script>
    </head>
    <body onload="testQuery();">
        <script>
function testQuery(){
    var endpoint = "http://dbpedia.org/sparql";
    var query = "PREFIX db: <http://dbpedia.org/resource/>\n\
PREFIX foaf: <http://xmlns.com/foaf/0.1/> \n\
PREFIX dbo: <http://dbpedia.org/ontology/> \n\
SELECT ?name ?birth ?death ?person \n\
WHERE\n\
{      \n\
  ?person dbo:birthPlace db:Berlin . \n\
 ?person dbo:birthDate ?birth .   \n\
 ?person foaf:name ?name .      \n\
  ?person dbo:deathDate ?death . \n\
 FILTER (?birth < \"1900-01-01\"^^xsd:date) . \n\
} \n\
ORDER BY ?name\n\
LIMIT 100"

   // $('#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>
        <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
        <script type="text/javascript" src="https://www.google.com/jsapi"></script>
        <script type="text/javascript" src="https://bordercloud.github.io/sgvizler2/sgvizler2/sgvizler2.js"></script>
    </head>
<body style="margin:0;">
<div id="sgvzl_example_query"
   data-sgvizler-endpoint="http://dbpedia.org/sparql"
   data-sgvizler-query="PREFIX db: &lt;http://dbpedia.org/resource/&gt;
PREFIX foaf: &lt;http://xmlns.com/foaf/0.1/&gt; 
PREFIX dbo: &lt;http://dbpedia.org/ontology/&gt; 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth &lt; &quot;1900-01-01&quot;^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100"
    data-sgvizler-chart='google.visualization.Table'
    data-sgvizler-chart-options=''
    data-sgvizler-endpoint_output_format='json'
    data-sgvizler-log='2'
    style='width:100%; height:450px;'  />



<script>
$(document).ready(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("http://dbpedia.org/sparql")
sparql.setQuery("""
    PREFIX db: <http://dbpedia.org/resource/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth < "1900-01-01"^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100""")
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 <- "http://dbpedia.org/sparql"
# create query statement
query <- "PREFIX db: <http://dbpedia.org/resource/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth < "1900-01-01"^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100"
# 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 = "http://dbpedia.org/sparql"
sparql = <<-EOT
PREFIX db: <http://dbpedia.org/resource/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth < "1900-01-01"^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100
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 = 'http://dbpedia.org/sparql';

query = ['PREFIX db: <http://dbpedia.org/resource/> '...
'PREFIX foaf: <http://xmlns.com/foaf/0.1/>  '...
'PREFIX dbo: <http://dbpedia.org/ontology/>  '...
'SELECT ?name ?birth ?death ?person  '...
'WHERE '...
'{       '...
'  ?person dbo:birthPlace db:Berlin .  '...
' ?person dbo:birthDate ?birth .    '...
' ?person foaf:name ?name .       '...
'  ?person dbo:deathDate ?death .  '...
' FILTER (?birth < "1900-01-01"^^xsd:date) .  '...
'}  '...
'ORDER BY ?name '...
'LIMIT 100 '];

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 ="http://dbpedia.org/sparql";
$sp_readonly = new SparqlClient();
$sp_readonly->setEndpointRead($endpoint);
$q = <<<EOD
PREFIX db: <http://dbpedia.org/resource/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dbo: <http://dbpedia.org/ontology/> 
SELECT ?name ?birth ?death ?person 
WHERE
{      
  ?person dbo:birthPlace db:Berlin . 
 ?person dbo:birthDate ?birth .   
 ?person foaf:name ?name .      
  ?person dbo:deathDate ?death . 
 FILTER (?birth < "1900-01-01"^^xsd:date) . 
} 
ORDER BY ?name
LIMIT 100EOD;
$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("http://dbpedia.org/sparql";, false);

            String querySelect = 'PREFIX db: <http://dbpedia.org/resource/> \n'
                    + 'PREFIX foaf: <http://xmlns.com/foaf/0.1/>  \n'
                    + 'PREFIX dbo: <http://dbpedia.org/ontology/>  \n'
                    + 'SELECT ?name ?birth ?death ?person  \n'
                    + 'WHERE \n'
                    + '{       \n'
                    + '  ?person dbo:birthPlace db:Berlin .  \n'
                    + ' ?person dbo:birthDate ?birth .    \n'
                    + ' ?person foaf:name ?name .       \n'
                    + '  ?person dbo:deathDate ?death .  \n'
                    + ' FILTER (?birth < "1900-01-01"^^xsd:date) .  \n'
                    + '}  \n'
                    + 'ORDER BY ?name \n'
                    + 'LIMIT 100 \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