ction is 
  almost same as cl:type-of, but exactly obeys RDFS semantics. The return value 
  for rdfs:Class object is the name of itself. </div></p>
<p>To get instances of a class, the function <b>collect-direct-instances-of</b> 
retrieves the direct instances of a class, and the function 
<b>collect-all-instances-of</b> collects all instances from the class and its 
subclasses. </p>
<blockquote><code>gx-user(31): (collect-direct-instances-of 
  rdf:List)<br/>(#&lt;rdf:List rdf:nil&gt;)<br/>gx-user(32): 
  