SaucelitoCanyonZinfandel1998&gt;<br/>gx-user(4): (typep 
vin:SaucelitoCanyonZinfandel1998 vin:Zinfandel)<br/>t<br/>t<br/>gx-user(5): (typep 
vin:SaucelitoCanyonZinfandel1998 vin:Vintage)<br/>t<br/>t<br/>gx-user(6): (type-of 
vin:SaucelitoCanyonZinfandel1998)<br/>(vin:Vintage 
vin:Zinfandel)</code><br/>
<h3>5.9 &nbsp;Extension of property and slot definition </h3>
<p>A set of all triples whose predicate is a specific property is called the <a 
href="http://www.w3.org/TR/rdf-mt#defexten"><i>extension</i> of t