d to by a property resource object. Function 
<b>collect-all-extensions-of</b> collects all elements in the extension of a 
property and lists up them.</p>
<code>gx-user(53): 
rdfs:comment<br/>#&lt;rdf:Property rdfs:comment&gt;<br/>gx-user(54): (find 
'rdfs:comment (mop:class-slots 
rdfs:Class)<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:key 
#'name)<br/>#&lt;gx::Property-effective-slot-definition rdfs:comment @ 
#x20a9520a&gt;<br/>g