%META:TOPICPARENT{name="InteractiveSparqlQueryBuilderTutorials"}%

---++iSPARQL Querying Tutorial with SPARQL Query type "DESCRIBE".

This tutorial shows how to execute a SPARQL query with type "DESCRIBE". 


%TOC%

---+++Enter and execute a query

   1 Go to http://cname/isparql, for ex: http://id.myopenlink.net/isparql
   1 The iSPARQL initialization window will be shown:
%BR%%BR% <img src="%ATTACHURLPATH%/isparqlload.png" style="wikiautogen"/>%BR%%BR%
   1 On successful initialization will be presented the iSPARQL <strong>Advanced</strong> tab open with a default SPARQL query:
<verbatim>
SELECT * WHERE {?s ?p ?o}
</verbatim>
%BR%%BR% <img src="%ATTACHURLPATH%/isparql1.png" style="wikiautogen"/>%BR%%BR%
   1 Go to <strong>QBE</strong> tab:
%BR%%BR% <img src="%ATTACHURLPATH%/isparql2.png" style="wikiautogen"/>%BR%%BR%
   1 Click the <strong>Clear Pane</strong> icon on the toolbar to empty the Canvas. 
%BR%%BR% <img src="%ATTACHURLPATH%/isparql3.png" style="wikiautogen"/>%BR%%BR%
%BR%%BR%<img src="%ATTACHURLPATH%/isparql4.png" style="wikiautogen"/>%BR%%BR%
   1 In the <strong>Schemas</strong> pane, import the schema with URL <strong>http://rdfs.org/sioc/types#</strong>:
%BR%%BR%<img src="%ATTACHURLPATH%/isc13.png" style="wikiautogen"/>%BR%%BR%
   1 In the <strong>Schemas</strong> window under "unbound", you should now see 
<strong>sioct</strong>. Click the <strong>+</strong> icon for "Classes" in order to expand it.
%BR%%BR%<img src="%ATTACHURLPATH%/isc14.png" style="wikiautogen"/>%BR%%BR%
   1 Scroll down the shown list and drag-and-drop the Subject Node <strong>Weblog</strong> 
onto the QBE working Canvas.
%BR%%BR%<img src="%ATTACHURLPATH%/isc15.png" style="wikiautogen"/>%BR%%BR%
   1 Select the empty node and, in the <strong>Variable</strong> field of 
the "Node" pane, enter the value: <strong>?forum</strong>:
%BR%%BR%<img src="%ATTACHURLPATH%/isc16.png" style="wikiautogen"/>%BR%%BR%
   1 Change the <strong>Data Source URI</strong> field value on the QBE tab to the 
Graph of the database against which you want to execute your query, i.e., for this 
example -- <strong><tt><nowiki>http://id.myopenlink.net/dataspace</nowiki></tt></strong>
%BR%%BR%<img src="%ATTACHURLPATH%/isc17.png" style="wikiautogen"/>%BR%%BR%
   1 On the <strong>QBE</strong> tab, apply the following changes:
      1 Select <strong>DESCRIBE</strong> for <strong>Type</strong>. 
      1 Select <strong>10</strong> for <strong>Results Size Limit</strong>.
%BR%%BR%<img src="%ATTACHURLPATH%/isc18.png" style="wikiautogen"/>%BR%%BR%
   1 Click the <strong>Run Query</strong> button on the QBE toolbar.
   1 The <strong>Results</strong> sub-tab shown below the Results tab will present the results of executing our SPARQL Query with type "DESCRIBE":
%BR%%BR%<img src="%ATTACHURLPATH%/isc19.png" style="wikiautogen"/>%BR%%BR%
   1 To view the produced SPARQL query, click the <strong>Load Query 
to Advanced</strong> button.<i>Note: you can also view the produced 
SPARQL Query in the <strong>QBE</strong> tab by clicking the 
<strong>Generate</strong> button on the QBE toolbar.</i>
   1 The <strong>Advanced</strong> tab will open, with the produced SPARQL 
query with type "DESCRIBE" in the <strong>SPARQL Query</strong> text-area:
%BR%%BR%<img src="%ATTACHURLPATH%/isc20.png" style="wikiautogen"/>%BR%%BR%

---+++Related

   * [[InteractiveSparqlQueryBuilderTutorials][iSPARQL Tutorials]]
   * [[InteractiveSparqlQueryBuilderBasicTutorial1][Basic iSPARQL Tutorial with query built from a blank canvas and pre-typed Nodes]]
   * [[InteractiveSparqlQueryBuilderBasicTutorial2][Basic iSPARQL Tutorial with query built from a blank canvas and Nodes dragged from the Toolbar]]
   * [[InteractiveSparqlQueryBuilderBasicTutorial][Basic iSPARQL Tutorial]]
   * [[InteractiveSparqlQueryBuilderQueryTutorialConstruct][iSPARQL Querying Tutorial with SPARQL Query type "CONSTRUCT"]]
   * [[InteractiveSparqlQueryBuilderQueryTutorialInsert][iSPARQL Querying Tutorial with SPARQL Query type "INSERT"]]
   * [[InteractiveSparqlQueryBuilderQueryTutorialDelete][iSPARQL Querying Tutorial with SPARQL Query type "DELETE"]]
   * [[InteractiveSparqlQueryBuilderQueryTutorialSlc][iSPARQL Querying Tutorial with SPARQL Query type "SELECT"]]   
   * [[OATWikiWebIndex][OpenLink AJAX Toolkit (OAT)]]
   * [[http://docs.openlinksw.com/virtuoso/rdfsparul.html#rdfsparulexamples][Virtuoso Documentation SPARQL Query examples]]


CategorySPARQL CategoryRDF CategoryOpenSource CategoryOAT CategoryDocumentation CategoryTutorial