Example for Multiple RDF Source Files Upload

The following example demonstrates how to upload multiple RDF source files using the Bulk Loading Sequence.

1. Assuming there is a folder with name "tmp" in your FS and it is under a directory specified in the DirsAllowed param defined in your virtuoso ini file.
2. Also assume in the folder "tmp" you have the files: "file1.n3" and "file2.n3", that contain:
   

   
   -- file1.n3
   <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/sioc/ns#User> .
   <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this> <http://rdfs.org/sioc/ns#name> 	"Kingsley Uyi Idehen" .
   <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this> <http://rdfs.org/sioc/ns#has_function> 	<http://www.openlinksw.com/dataspace/kidehen@openlinksw.com/briefcase/My%20Web%20Drive#owner> .
   
   
   --file2.n3
   <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this> <http://rdfs.org/sioc/ns#id>  	"kidehen@openlinksw.com" .
   <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this> <http://rdfs.org/sioc/ns#link> 	<http://www.openlinksw.com/dataspace/kidehen@openlinksw.com> .
   <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this> <http://rdfs.org/sioc/ns#account_of> 	<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this> .
   

   
   
3. Make sure the Bulk Loading script is executed.
4. Register the files file1.n3 and file2.n3 with graph IRI the triples to go to "http://kidehendata.com#":
   

   
   SQL>ld_dir ('tmp', '*.n3', 'http://kidehendata.com#');
   Done. -- 90 msec.
   

   
   
   1. Note that if there are other *.n3 files in your folder (tmp), then their content also will go to the location specified by the above graph.
   2. Also is recommended files with *. ext.graph to be deleted from the tmp folder.
5. Create in the "tmp" folder an empty file with name: global.graph
6. Edit the global.graph by adding the graph URI, so the content of the file to be:
   

   
   http://kidehendata.com#
   

   
   
7. Finally execute:
   

   
   SQL>rdf_loader_run ();
   Done. -- 100 msec.
   

   
   
8. As result in the Virtuoso log should be notification of the loading having completed:
   

   
   10:21:50 PL LOG: Loader started
   10:21:50 PL LOG: No more files to load. Loader has finished
   

   
   
9. To check the inserted triples for the given graph, execute:
   

   
   SQL>SPARQL
   SELECT * 
   FROM <http://kidehendata.com#>
   WHERE 
     {
       ?s ?p ?o
     }
   ;
   s                                                                p                                                 o
   VARCHAR                                                          VARCHAR                                           VARCHAR
   _______________________________________________________________________________
   http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this  http://www.w3.org/1999/02/22-rdf-syntax-ns#type   http://rdfs.org/sioc/ns#User
   http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this  http://rdfs.org/sioc/ns#name                      Kingsley Uyi Idehen
   http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this  http://rdfs.org/sioc/ns#has_function              http://www.openlinksw.com/dataspace/kidehen@openlinksw.com/briefcase/My%20Web%20Drive#owner
   http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this  http://rdfs.org/sioc/ns#id                        kidehen@openlinksw.com
   http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this  http://rdfs.org/sioc/ns#link                      http://www.openlinksw.com/dataspace/kidehen@openlinksw.com
   http://www.openlinksw.com/dataspace/kidehen@openlinksw.com#this  http://rdfs.org/sioc/ns#account_of                http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this
   
   6 Rows. -- 20 msec.