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| − | ==== Sparql endpoint ==== | + | ==== Sparql endpoint: The SPARQL endpoint for the RDF dataset of OpenResearch is accessable here ==> [http://openresearch.org/sparql sparql]==== |
| − | The **sparql endpoint** for the RDF dataset of OpenResearch is accessable here --> **[http://openresearch.org/sparql sparql]**. | |
| | | | |
| − | ==== The following contains some sparql query examples ==== | + | ==== 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 ===== | + | ==== The following page contains queries related to data quality ==== |
| − | <pre>
| + | [[Sparql_endpoint/Maintenance]] |
| − | 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>
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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 ?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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