iSPARQL "DESCRIBE" Tutorial showing Results in a Google Maps View

This tutorial shows how to execute a SPARQL DESCRIBE query in iSPARQL, and view its results in Google Maps.

Procedure

1. Go to http://<cname>:*lt;port>/isparql, e.g., http://linkeddata.uriburner.com/isparql/.
2. The iSPARQL initialization window will be shown:
   
   
   
   
3. After iSPARQL loads, the Advanced tab will be open, with a default SPARQL query, e.g.:
   

   
   SELECT * WHERE {?s ?p ?o}
   

   
   
   
   
   
   
4. Click to the QBE tab:
   
   
   
   
5. Click the Clear Pane icon on the toolbar, to empty the Canvas.
   
   
   
   
   
   
   
   
6. Click to the Advanced tab and enter the following query:
   

   
   DESCRIBE ?s 
   WHERE 
     {
       ?s oplsg:subcategory ?o
     } 
   LIMIT 100
   

   
   
   
   
   
   
7. Click Run Query.
8. The Results tab should appear, with your query's results:
   
   
   
   
9. Change the View menu selection from Navigator to type Google Maps v3.
   
   
   
   
10. The display will change to the Google Map view:
    
    
    
    
11. Click on a Google item to view its properties:
    
    
    
    

Related

• iSPARQL Tutorials
  • Basic iSPARQL Tutorial
  • Basic iSPARQL Tutorial with query built from a blank canvas and pre-typed Nodes
  • Basic iSPARQL Tutorial with query built from a blank canvas and Nodes dragged from the Toolbar
  • iSPARQL "CONSTRUCT" Tutorial
  • iSPARQL "DESCRIBE" Tutorial
  • iSPARQL "INSERT" Tutorial
  • iSPARQL "DELETE" Tutorial
  • iSPARQL "SELECT" Tutorial
• OpenLink AJAX Toolkit (OAT)
• SPARQL Query examples in the main Virtuoso Documentation