How to load data in Virtuoso?

Photo by Charles Deluvio on Unsplash
  • Open the console and run the following command: cd /usr/local/virtuoso-opensource/share/virtuoso/vad
  • Next, run the following command to download the ontology:
    sudo wget http://downloads.dbpedia.org/2014/dbpedia_2014.owl.bz2
  • Then, unzip the downloaded file with the following file:
    sudo bzip2 -d dbpedia_2014.owl.bz2
  • Next, create the .graph file necessary for the batch load to Virtuoso with the following command:
    sudo touch dbpedia_2014.owl.graph
  • Next, open the file and add http://localhost:8890/dbpedia. This can be performed with the following command:
    sudo nano dbpedia_2014.owl.graph
    (In case you are not familiar with the nano text editor on Linux, after running the nano command, you should add the specified line, press the buttons ‘Ctrl’ and ‘x’ at the same time, then press ‘y’, and finally press ‘enter’.)
sudo wget http://downloads.dbpedia.org/2014/en/instance_types_en.nt.bz2 
sudo bzip2 -d instance_types_en.nt.bz2
sudo touch instance_types_en.nt.graph
sudo nano instance_types_en.nt.graph
ld_dir (‘/usr/local/virtuoso-opensource/share/virtuoso/vad’, ‘*.owl’, ‘http://localhost:8890/dbpedia') ; rdf_loader_run(); ld_dir (‘/usr/local/virtuoso-opensource/share/virtuoso/vad’, ‘*.nt’, ‘http://localhost:8890/dbpedia') ; rdf_loader_run();
SELECT COUNT (*) WHERE { ?a ?b ?c }

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Kashif Rabbani

Kashif Rabbani

I am a data science PhD researcher who loves to write!