1  <?xml version="1.0" encoding="ISO-8859-1" ?>
 2  <!-- 3.2.3 : 2.1 
 3      One of ref or name must be present, but not both.
 4  -->
 5  <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://foo" xmlns:foo="http://foo">
 6  	
 7    <element name="bar" type="string"/>	
 8  	
 9    <element name="foo">
10    	  <complexType>
11    	  	<sequence>
12    	  		<element name="bar" ref="foo:bar"/>	   
13    	  	</sequence>
14    	  </complexType>    
15    </element>  
16  
17  </schema>