The fullext index via Lucene is only used if you use the corresponding special predicate (which is non-standard SPARQL syntax) in your query:
text:query e.g. in a query like (taken form the documentation): PREFIX text: <http://jena.apache.org/text#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?s { ?s text:query (rdfs:label 'word' 10) ; rdfs:label ?label } > I'm reading the documentation at > https://jena.apache.org/documentation/query/text-query.html but I don't > understand if this is only for full-text searches. Or should I use one of > these indexes every time I use one the string functions > (https://www.w3.org/TR/sparql11-query/#func-strings) such as CONTAINS, LCASE, > etc.? > -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center