Difference between revisions of "Sparql endpoint"
(→Query 1, find events which have country location, city location, start date, end date, and home page) |
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PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A> | PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A> | ||
PREFIX wiki: <http://openresearch.org/Special:URIResolver/> | PREFIX wiki: <http://openresearch.org/Special:URIResolver/> | ||
| + | PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#> | ||
| + | PREFIX foaf: <http://xmlns.com/foaf/0.1/> | ||
SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?homepage WHERE { | SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?homepage WHERE { | ||
| − | ?e property:Has_location_country category:Germany . | + | ?e property:Has_location_country category:Germany. |
?e rdfs:label ?event. | ?e rdfs:label ?event. | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
?e property:Has_location_city ?city. | ?e property:Has_location_city ?city. | ||
?e property:Has_location_country ?country. | ?e property:Has_location_country ?country. | ||
| − | ?e | + | ?e icaltzd:dtend ?endDate. |
| − | ?e swivt:page ?wikipage | + | ?e icaltzd:dtstart ?startDate. |
| + | ?e foaf:homepage ?homepage. | ||
| + | ?e swivt:page ?wikipage. | ||
} ORDER BY DESC(?startDate) LIMIT 100 | } ORDER BY DESC(?startDate) LIMIT 100 | ||
</pre> | </pre> | ||
Revision as of 18:23, 10 December 2016
Contents
- 1 Sparql endpoint
- 2 The following contains some sparql query examples
- 2.1 Query 1, find events which have country location, city location, start date, end date, and home page
- 2.2 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"
- 2.3 Query 3, get pc members and general chairs who involve semantic web related events in last 7 years
Sparql endpoint
The sparql endpoint for the RDF dataset of OpenResearch is in sparql.
The following contains some sparql query examples
Query 1, find events which have country location, city location, start date, end date, and home page
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
PREFIX category: <http://openresearch.org/Special:URIResolver/Category-3A>
PREFIX wiki: <http://openresearch.org/Special:URIResolver/>
PREFIX icaltzd: <https://www.w3.org/2002/12/cal/icaltzd#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?homepage WHERE {
?e property:Has_location_country category:Germany.
?e rdfs:label ?event.
?e property:Has_location_city ?city.
?e property:Has_location_country ?country.
?e icaltzd:dtend ?endDate.
?e icaltzd:dtstart ?startDate.
?e foaf:homepage ?homepage.
?e swivt:page ?wikipage.
} ORDER BY DESC(?startDate) LIMIT 100
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
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#>
SELECT ?event ?endDate ?startDate ?city ?country ?wikipage ?acceptanceRate ?continent WHERE {
?e rdfs:label ?event.
?e property:Has_location_country ?country.
?country rdfs:subClassOf ?partContinent.
?partContinent rdfs:subClassOf ?continent.
?continent rdfs:isDefinedBy site:Category:Europe.
?e a category:Semantic_Web.
?e property:Start_date ?startDate.
?e property:End_date ?endDate.
?e property:Acceptance_rate ?acceptanceRate.
?e property:Has_location_city ?city.
?e swivt:page ?wikipage.
FILTER (?acceptanceRate < 25.0 && ?startDate >= "2016-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
} ORDER BY DESC(?startDate) LIMIT 100
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
PREFIX urir: <http://openresearch.org/Special:URIResolver/>
PREFIX property: <http://openresearch.org/Special:URIResolver/Property-3A>
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#>
SELECT ?event ?endDate ?startDate ?pcMember ?geMember WHERE {
?e rdfs:label ?event.
?e property:Has_PC_member ?pcMember.
?e property:Has_general_chair ?geMember.
?e a category:Semantic_Web.
?e property:Start_date ?startDate.
?e property:End_date ?endDate.
minus {?e property:Has_PC_member urir:Some_person.}
FILTER (?startDate >= "2010-01-01"^^xsd:date && ?endDate < "2017-01-01"^^xsd:date).
} ORDER BY DESC(?startDate) LIMIT 10
