CLAVIUS EXAMPLE

Christopher Clavius (25 March 1538 – 6 February 1612) was a German Jesuit mathematician and astronomer who was the main architect of the modern Gregorian calendar. In his last years he was probably the most respected astronomer in Europe and his textbooks were used for astronomical education for over fifty years in and even out of Europe.

SPARQL QUERY: Events occurred between 1538-03-25 and 1612-02-06

				
PREFIX : <http://dbpedia.org/resource/>
PREFIX dbp: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX dbpprop: <http://dbpedia.org/property/>

SELECT ?event ?date ?place ?lat_lng
WHERE {
   ?event rdf:type dbp:Event .
   OPTIONAL { 
      ?event dbp:place ?place .
      ?place grs:point ?lat_lng
   }
   OPTIONAL { ?event dbp:date ?date .}
   FILTER ( ?date >= '1538-03-25'^^xsd:date && ?date < '1612-02-06'^^xsd:date )
}
GROUP BY ?event ?date ?place