1<?xml version="1.0" encoding="ISO-8859-1"?>
2<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified">
3
4	<xs:element name="foo" type="baseType"/>
5
6	<xs:complexType name="baseType">
7		<xs:all>
8			<xs:element name="bar" type="derivedType" minOccurs="0"/>
9		</xs:all>
10		<xs:attribute name="attrA" type="xs:string" use="required"/>
11	</xs:complexType>
12
13	<xs:complexType name="derivedType">
14		<xs:complexContent>
15			<xs:extension base="baseType">
16				<xs:attribute name="attrB" type="xs:string" use="required"/>
17			</xs:extension>
18		</xs:complexContent>
19	</xs:complexType>
20
21</xs:schema>
22
23
24
25
26