Thank you Andy, this makes things clear. I understood the best way is to use Fuseki engine and access the data via sparql service.
It would be idea to have the tdbquery command working with the indexes as well. Best, Samur On 22 December 2016 at 12:43, Andy Seaborne <[email protected]> wrote: > > > On 22/12/16 09:18, Samur Araujo wrote: > >> Hi all, Is it possible to use tdbquery for textsearch? >> >> I have configured, loaded and index the data using tdbloader and >> jena.textindexer. >> >> However, when I use tdbquery to query the database it seems to ignore the >> lucene index. >> >> I use the command: >> tdbquery --desc textsearch.ttl --query search.rq >> > > By default, the class files for jena-text will not be available to the > command. Did you not get some kind of warning? (which version are you > using?) > > However, the main issue is that theer are two datasets in the assembler > file. "tdbquery --desc" will look for the TDB dataset. > > I think it needs some coding to run a text backed query. Use > TextDatasetFactory.create(filename) to build from the assembler. > > (Maybe there is a better way someone can point out - I have used jena-text > in a while). > > Andy > > >> Do I need to provide any extra configuration? Do I need to compile jena >> with special features? >> > > No - but the TDB command line tools are not sufficient. > > > >> The assembler is below: >> @prefix : <http://localhost/jena_example/#> . >> @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . >> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . >> @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> . >> @prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> . >> @prefix text: <http://jena.apache.org/text#> . >> >> ## Example of a TDB dataset and text index >> ## Initialize TDB >> [] ja:loadClass "org.apache.jena.tdb.TDB" . >> tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset . >> tdb:GraphTDB rdfs:subClassOf ja:Model . >> >> ## Initialize text query >> [] ja:loadClass "org.apache.jena.query.text.TextQuery" . >> # A TextDataset is a regular dataset with a text index. >> text:TextDataset rdfs:subClassOf ja:RDFDataset . >> # Lucene index >> text:TextIndexLucene rdfs:subClassOf text:TextIndex . >> # Solr index >> text:TextIndexSolr rdfs:subClassOf text:TextIndex . >> >> ## --------------------------------------------------------------- >> ## This URI must be fixed - it's used to assemble the text dataset. >> >> :text_dataset rdf:type text:TextDataset ; >> text:dataset <#dataset> ; >> text:index <#indexLucene> ; >> . >> >> # A TDB datset used for RDF storage >> <#dataset> rdf:type tdb:DatasetTDB ; >> tdb:location "DB2" ; >> tdb:unionDefaultGraph true ; # Optional >> . >> >> # Text index description >> <#indexLucene> a text:TextIndexLucene ; >> text:directory <file:Lucene2> ; >> ##text:directory "mem" ; >> text:entityMap <#entMap> ; >> . >> >> # Mapping in the index >> # URI stored in field "uri" >> # rdfs:label is mapped to field "text" >> <#entMap> a text:EntityMap ; >> text:entityField "uri" ; >> text:defaultField "text" ; >> text:map ( >> [ text:field "text" ; text:predicate rdfs:label ] >> ) . >> >> >> -- Senior Data Scientist Geophy www.geophy.com Nieuwe Plantage 54-55 2611XK Delft +31 (0)70 7640725 1 Fore Street EC2Y 9DT London +44 (0)20 37690760
