Sample SPARQL Queries

Below are examples of query terms on the LAK dataset; you can run queries directly from a URL.

The following SPARQL query returns the full text of all 2011 papers (LAK 2011, EDM conference and journal 2011) in .srx format (XML file which can be opened in any text editor):

PREFIX led:<http://data.linkededucation.org/ns/linked-education.rdf#>
PREFIX swrc:<http://swrc.ontoware.org/ontology#>
SELECT ?paper ?fulltext 
  WHERE { ?paper led:body ?fulltext . ?paper swrc:year ?year . 
           FILTER (?year = "2011") }

Run Query

As a second example, the following query can be used to retrieve, as RDF data, all papers co-authored by Simon Buckingham Shum and Rebecca Ferguson

PREFIX dc:<http://purl.org/dc/elements/1.1/>
DESCRIBE ?paper 
  WHERE {?paper dc:creator 
           <http://data.linkededucation.org/resource/lak/person/
              simon-buckingham-shum> 
        . ?paper dc:creator 
           <http://data.linkededucation.org/resource/lak/person/rebecca-ferguson> }

Run Query

All the EDM papers of 2012 (and not LAK 2012 papers):

PREFIX led:<http://data.linkededucation.org/ns/linked-education.rdf#>
PREFIX swrc:<http://swrc.ontoware.org/ontology#>
PREFIX swc:<http://data.semanticweb.org/ns/swc/ontology#>
SELECT ?paper ?fulltext 
  WHERE { ?conference swc:hasAcronym ?acronym . 
          ?proceedings  swc:relatedToEvent ?conference . 
          ?proceedings swc:hasPart ?paper . 
          ?paper led:body 
          ?fulltext . FILTER (?acronym = "EDM2012")  }

Run Query

All papers published in both EDM and LAK conferences by the authors affiliated to an institution (the “Worcester Polytechnic Institute” in the example):

PREFIX dc:<http://purl.org/dc/elements/1.1/>
PREFIX swrc:<http://swrc.ontoware.org/ontology#>
PREFIX swc:<http://data.semanticweb.org/ns/swc/ontology#>
SELECT  distinct ?title ?year ?acronym 
     WHERE { ?conference swc:hasAcronym ?acronym . 
             ?proceedings  swc:relatedToEvent ?conference . 
             ?proceedings swc:hasPart ?paper . 
             ?paper dc:creator ?author . ?paper dc:title ?title . 
             ?paper swrc:year ?year . 
             ?author swrc:affiliation ?organization . 
             FILTER (?organization = 
              <http://data.linkededucation.org/resource/lak/
                    organization/worcester-polytechnic-institute> )}

Run Query