sample7.xml

<?xml version="1.0" standalone="no" ?>
<a:testroot2
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
      xmlns:so="http://archive.astro.umd.edu/ont/SemanticObject#" 
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:a="http://test.org/ont/test#" 
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xsi:schemaLocation="http://test.org/ont/test# test.xsd"
>

  <!-- in different property with a same object, using reference 
       and extended -->
  <a:prop12>
      <so:semanticObject>
		  <rdf:type resource="urn:testSemanticObject2"/>
      </so:semanticObject>
  </a:prop12>
  
  <rdfs:label>A label for this property here.</rdfs:label>
  <rdf:type resource="urn:testSemanticObject1"/>
</a:testroot2>