Sample Keyword Expansion SPARQL Query

expand-keywords.sparql

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX skosxl: <http://www.w3.org/2008/05/skos-xl#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>

SELECT (str(?prefTerm) AS ?pTerm) (str(?altTerm) AS ?aTerm)
        FROM  <urn:x-evn-master:BenefitSectionDetails0>
        FROM  <urn:x-evn-master:BenefitSection>
       WHERE {
                 ?s (skosxl:prefLabel | skosxl:altLabel) / skosxl:literalForm ?allTerms .
                 FILTER (LCASE(str(?allTerms)) = LCASE('IUD'))
                 {?s skosxl:prefLabel/skosxl:literalForm ?prefTerm .
                      ?s skosxl:altLabel/skosxl:literalForm ?altTerm .
                 }  
                 UNION
                 {
                      ?s skos:broader* ?pConcept .
                      ?pConcept skosxl:prefLabel/skosxl:literalForm ?prefTerm .
                      ?pConcept skosxl:altLabel/skosxl:literalForm ?altTerm .
                  }
              }