1<?xml version="1.0" encoding="ISO-8859-1" ?>
2<!-- 3.2.3 : 2.2 
3    If ref is present, then all of <complexType>, <simpleType>, <key>, <keyref>, <unique>, 
4    nillable, default, fixed, form, block and type must be absent, i.e. only minOccurs, maxOccurs, 
5    id are allowed in addition to ref, along with <annotation>.
6
7-->
8<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://foo" xmlns:foo="http://foo">
9	
10  <element name="bar" type="string"/>	
11	
12  <element name="foo">
13  	  <complexType>
14  	  	<choice>
15  	  	
16  	  		<!-- The good ones. -->
17  	  		<element ref="foo:bar" minOccurs="0"/>
18  	  		<element ref="foo:bar" maxOccurs="0"/>
19  	  		<element ref="foo:bar" id="myomy"/>
20  	  		
21  	  		<!-- The bad ones. -->
22  	  		<element ref="foo:bar">
23  	  			<complexType>
24  	  				<attribute name="bar" type="string"/>
25  	  			</complexType>
26  	  		</element>
27  	  		
28  	  		<element ref="foo:bar">
29  	  			<simpleType>
30  	  				<restriction base="string">
31  	  					<maxLength value="20"/>
32  	  				</restriction>
33  	  			</simpleType>
34  	  		</element>  
35  	  		
36  	  		<element ref="foo:bar" type="string"/>
37  	  		<element ref="foo:bar" nillable="true"/>
38  	  		<element ref="foo:bar" default="Joni"/>
39  	  		<element ref="foo:bar" fixed="Mitchel"/>
40  	  		<element ref="foo:bar" form="unqualified"/>
41  	  		<element ref="foo:bar" block="restriction"/>  	  		
42  	  		
43  	  	</choice>
44  	  </complexType>    
45  </element>  
46  
47
48</schema>
49