text_search.rq

# Search subjects by free text and list them with a label
# (requieres an index named 'text' in Fuseki/Jena)
#
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX text: <http://jena.apache.org/text#>
#
select  distinct ?s (str(?label) as ?sLabel)
where {
  values ( ?query ?language ) {
    ( 'market' 'en' )
  }
  ?s text:query ?query .
  #
  # get the most precise label in the selected langage
  optional {
    {
      ?s skos:prefLabel ?prefLabel .
    }
  }
  optional {
    {
      ?s dcterms:title ?dctermsTitle .
    }
  }
  optional {
    {
      ?s dc:title ?dcTitle .
    }
  }
  optional {
    {
      ?s rdfs:label ?rdfsLabel .
    }
  }
  bind (coalesce(?prefLabel,?dctermsTitle, ?dcTitle, ?rdfsLabel, '[no label found]') as ?label)
  filter (lang(?label) = ?language)
}
limit   10