Consider the following program that finds
all named ComplexTypes in an XML schema.
Fr example, the following complex type definition is
introducing a type called PurchaseOrderType.

 <xsd:complexType name="PurchaseOrderType">       

Find the UNKNOWNs below.


Schema {
  {{
    HashSet getDefThings(ClassGraph cg){
      String definedThings =
	"from Schema to ComplexType";
      Visitor v = new Visitor(){
	HashSet r = new HashSet();
	void before(ComplexType host){
	  String n = host.get_attrs().search_name();
	  if (!(n == null)) r.add(n);
        }
	public Object getReturnValue(){return r;}
      };
      cg.traverse(this,definedThings,v);
      return (HashSet) v.getReturnValue();
    }
  }}
}

AttrValue_List {
{{
String search_name(){
  Enumeration en = this.elements();
  String s = new String("name");
  String result;
  while (en.hasMoreElements()) {
    AttrValue n = (AttrValue) en.nextElement();
    if (s.equals(n.get_attrName().toString())) {
      result = n.get_attrValue();
      System.out.println("Type " + result + " found");
      return result;
    }
  }
  System.out.println("NOTHING FOUND");
  return null;
}
}}
}