title: Rewrite SPARQL DESCRIBE query as CONSTRUCT
body: <p>For some reason I can't issue DESCRIBE queries using Redland ( librdf.org ), is it possible to rewrite DESCRIBE as a CONSTRUCT QUERY for a given URI?</p>
  
  <pre><code>DESCRIBE &lt;urn:my-uri&gt;
  </code></pre>
  
  <p>I was thinking about writting it into something like this but I don't think this is valid in SPARQL</p>
  
  <pre><code>CONSTRUCT  { ?subject ?predicate ?object }
  WHERE      { 
                 { ?subject ?predicate ?object } 
                 AND { 
                     { &lt;urn:my-uri&gt; ?predicate ?object } 
                     OR { ?subject &lt;urn:my-uri&gt; ?object } 
                     OR { ?subject ?predicate &lt;urn:my-uri&gt; } 
                 } 
             }
  </code></pre>