xs:extension processing

[JoelBender]

Given an element like this:

<xs:element name="CeilingArea" minOccurs="0">
  <xs:annotation>
    <xs:documentation>Surface area of roof. (ft2)</xs:documentation>
  </xs:annotation>
  <xs:complexType>
    <xs:simpleContent>
      <xs:extension base="xs:decimal">
        <xs:attribute ref="auc:Source"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
</xs:element>

The CeilingArea class should have a "Source" attribute in the aux: namespace.

This replaces the "more to do ***" debug line.