Difference between revisions of "Sparql endpoint"

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(/* Query 8, What might be the registration fee of event E in the coming edition? (take the registration fee of last three editions and calculate the change, show the last edition fee +/the average of the two changes e.g., Registration fee of Event E201...)
 
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==== Sparql endpoint The SPARQL endpoint for the RDF dataset of OpenResearch is accessable here ==> [http://openresearch.org/sparql sparql]====
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==== Sparql endpoint: The SPARQL endpoint for the RDF dataset of OpenResearch is accessable here ==> [http://openresearch.org/sparql sparql]====
  
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==== The following contains some sparql query examples ====  
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==== The following page contains example SPARQL query that can be used by users to get ideas on what type queries can be run====  
 +
[[Sparql_endpoint/Examples]]
  
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===== Query 1, find events which have country location, city location, start date, end date, and home page =====
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==== The following page contains queries related to data quality ====  
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<pre>
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[[Sparql_endpoint/Maintenance]]
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
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PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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PREFIX foaf: <http://xmlns.com/foaf/0.1/>
 
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SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?homepage WHERE {
 
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  ?e property:Has_location_country category:Germany.
 
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  ?e rdfs:label ?event.
 
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  ?e property:Has_location_city ?city.
 
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  ?e property:Has_location_country ?country.
 
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  ?e icaltzd:dtend ?endDate.
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e foaf:homepage ?homepage.
 
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  ?e swivt:page ?wikipage.
 
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} ORDER BY DESC(?startDate) LIMIT 100
 
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</pre>
 
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===== Query 2, get events happen in Europe between 2016-01-01 and 2017-01-01, with acceptance rate less than 25%, with related to "semantic web" =====
 
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<pre>
 
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
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PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
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PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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PREFIX foaf: <http://xmlns.com/foaf/0.1/>
 
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SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?acceptanceRate ?continent WHERE {
 
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  ?e rdfs:label ?event.
 
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  ?e property:Has_location_country ?country.
 
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  ?country rdfs:subClassOf ?partContinent.
 
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  ?partContinent rdfs:subClassOf ?continent.
 
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  ?continent rdfs:isDefinedBy site:Category:Europe.
 
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  ?e a category:Semantic_Web.
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e icaltzd:dtend ?endDate.
 
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  ?e property:Acceptance_rate ?acceptanceRate.
 
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  ?e property:Has_location_city ?city.
 
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  ?e swivt:page ?wikipage.
 
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  FILTER (?acceptanceRate < 25.0 && ?startDate >= "2016-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
 
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} ORDER BY DESC(?startDate) LIMIT 100
 
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</pre>
 
−
 
 
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===== Query 3, get pc members and general chairs who involve semantic web related events in last 7 years =====
 
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<pre>
 
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX urir: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
−
PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
−
PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
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PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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−
 
 
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SELECT ?event ?endDate ?startDate ?pcMember ?geMember WHERE {
 
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  ?e rdfs:label ?event.
 
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  ?e property:Has_PC_member ?pcMember.
 
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  ?e property:Has_general_chair ?geMember.
 
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  ?e a category:Semantic_Web.
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e icaltzd:dtend ?endDate.
 
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  minus {?e property:Has_PC_member urir:Some_person.}
 
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  FILTER (?startDate >= "2010-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
 
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} ORDER BY DESC(?startDate) LIMIT 10
 
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</pre>
 
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===== Query 4, Which period of year have had the most number of events organized for a specific field or topic =====
 
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<pre>
 
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        PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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        PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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        PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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        PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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        PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
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        PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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        SELECT ?month (count(?e) as ?numEvents) WHERE
 
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        {
 
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          ?e rdfs:label ?event.
 
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          ?e icaltzd:dtend ?endDate.
 
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          ?e icaltzd:dtstart ?startDate.
 
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          ?e a category:Semantic_Web.
 
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          Filter (datatype(?endDate) != xsd:double && datatype(?startDate) != xsd:double)
 
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          FILTER (?startDate >= "2016-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
 
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          VALUES ?month {1 2 3 4 5 6 7 8 9 10 11 12}
 
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          FILTER ( month(?startDate) <= ?month && ?month <= month(?endDate) )
 
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        } GROUP BY ?month
 
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</pre>
 
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===== Query 5, List growing topics in the last 10 years. (definition of growing topic: a topic which corresponding events have an increasing number of submissions in each new edition is growing e.g., Semantic Web is growing because Number of submissions for  each edition of Event E in category of this topic from 2007 are growing: E2007=120, E2008=130, E2009=131, E2010=140,...E2016=220)=====
 
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<pre>
 
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX urir: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
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PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
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PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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PREFIX smwont: <http://data.semanticweb.org/ns/swc/ontology#>
 
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SELECT  ?series ?numEvents ?topic ?events ?years WHERE{
 
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  ?series a ?topic.
 
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  ?topic rdfs:subClassOf category:Computer_Science.
 
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  FILTER(?numEvents = 10).
 
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  {
 
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    SELECT  ?series
 
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            (count(?e) as ?numEvents)
 
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            (group_concat(distinct ?e; separator="; ") as ?events)
 
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            (group_concat(distinct ?startDate; separator="; ") as ?years)
 
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    WHERE {
 
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      ?e rdfs:label ?event.
 
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      ?e a smwont:ConferenceEvent.
 
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      ?e property:Event_in_series ?series.
 
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      ?e property:Submitted_papers ?num_papers.
 
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      ?e icaltzd:dtstart ?startDate.
 
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      ?e icaltzd:dtend ?endDate.
 
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      FILTER (datatype(?endDate) != xsd:double && datatype(?startDate) != xsd:double).
 
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      FILTER (?startDate >= "2007-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
 
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    }Group by ?series
 
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  }
 
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}
 
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</pre>
 
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===== Query 6, In what event, Person P had some role (either a chair, co-chair, PC member or participants), example: "Harith Alani" =====
 
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<pre>
 
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX urir: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
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PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
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PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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SELECT ?event ?endDate ?startDate ?person ?hasRole WHERE {
 
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  ?e rdfs:label ?event.
 
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  ?e ?hasRole ?person.
 
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  ?hasRole rdfs:subPropertyOf property:Has_person.
 
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  ?person rdfs:label "Harith Alani".
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e icaltzd:dtend ?endDate.
 
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}
 
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</pre>
 
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===== Query 7, List of conferences with best (lowest) acceptance rate in topic T; Example: list 10 conferences of topic "Semantic Web" sort in descending order based on Acceptance_rate =====
 
−
 
 
−
<pre>
 
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
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PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
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PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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PREFIX foaf: <http://xmlns.com/foaf/0.1/>
 
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PREFIX smwont: <http://data.semanticweb.org/ns/swc/ontology#>
 
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SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?acceptanceRate WHERE {
 
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  ?e rdfs:label ?event.
 
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  ?e property:Has_location_country ?country.
 
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  ?e a category:Semantic_Web.
 
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  ?e a ?EventTypes.
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e icaltzd:dtend ?endDate.
 
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  ?e property:Acceptance_rate ?acceptanceRate.
 
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  ?e property:Has_location_city ?city.
 
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  ?e swivt:page ?wikipage.
 
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  FILTER (datatype(?endDate) != xsd:double && datatype(?startDate) != xsd:double)
 
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} ORDER BY DESC(?acceptanceRate) LIMIT 10 BINDINGS ?EventTypes {(smwont:ConferenceEvent)}
 
−
 
 
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</pre>
 
−
 
 
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===== Query 8, What might be the registration fee of event E in the coming edition? =====
 
−
 
 
−
<pre>
 
−
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
−
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX urir: <http://openresearch.org/Special:URIResolver/>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
−
PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
−
PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
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PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
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PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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PREFIX smwont: <http://data.semanticweb.org/ns/swc/ontology#>
 
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SELECT  ?series
 
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(count(?e) as ?numEvents)
 
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(group_concat(distinct ?attendFee; separator="; ") as ?fees)
 
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(group_concat(distinct ?e; separator="; ") as ?events)
 
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(group_concat(distinct ?startDate; separator="; ") as ?years)
 
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WHERE {
 
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  ?e rdfs:label ?event.
 
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  ?e a smwont:ConferenceEvent.
 
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  ?e property:Event_in_series ?series.
 
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  ?e property:Attendance_fee ?attendFee.
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e icaltzd:dtend ?endDate.
 
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  FILTER (datatype(?endDate) != xsd:double && datatype(?startDate) != xsd:double).
 
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  FILTER (?startDate >= "2014-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
 
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}Group by ?series
 
−
 
 
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</pre>
 
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===== Query 9, Number or List of conferences and workshops of topic T in Year Y1 and Y2;example: list of conferences and workshops in topic "Semantic Web" happen in the years 2016, 2017 =====
 
−
 
 
−
<pre>
 
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
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PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
 
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PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
 
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
 
−
PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
 
−
PREFIX site: <http://openresearch.org/Special:ExportRDF/>
 
−
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
 
−
PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
 
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PREFIX foaf: <http://xmlns.com/foaf/0.1/>
 
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PREFIX smwont: <http://data.semanticweb.org/ns/swc/ontology#>
 
−
 
 
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SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?acceptanceRate WHERE {
 
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  ?e rdfs:label ?event.
 
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  ?e property:Has_location_country ?country.
 
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  ?e a category:Semantic_Web.
 
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  ?e a ?EventTypes.
 
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  ?e icaltzd:dtstart ?startDate.
 
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  ?e icaltzd:dtend ?endDate.
 
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  ?e property:Acceptance_rate ?acceptanceRate.
 
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  ?e property:Has_location_city ?city.
 
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  ?e swivt:page ?wikipage.
 
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  FILTER (datatype(?endDate) != xsd:double && datatype(?startDate) != xsd:double)
 
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  FILTER (?acceptanceRate < 25.0 && ?startDate >= "2016-01-01"^^xsd:date && ?endDate < "2018-01-01"^^xsd:date).
 
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} BINDINGS ?EventTypes {(smwont:ConferenceEvent) (smwont:WorkshopEvent)}
 
−
</pre>
 

Latest revision as of 18:21, 21 February 2017

Sparql endpoint: The SPARQL endpoint for the RDF dataset of OpenResearch is accessable here ==> sparql

The following page contains example SPARQL query that can be used by users to get ideas on what type queries can be run

Sparql_endpoint/Examples

The following page contains queries related to data quality

Sparql_endpoint/Maintenance

Retrieved from "https://confident.dbis.rwth-aachen.de/or/index.php?title=Sparql_endpoint&oldid=210803"