1 <?xml version="1.0" encoding="ISO-8859-1"?>
2 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified">
4 <xs:element name="foo" type="baseType"/>
6 <xs:complexType name="baseType">
8 <xs:element name="bar" type="derivedType" minOccurs="0"/>
10 <xs:attribute name="attrA" type="xs:string" use="required"/>
13 <xs:complexType name="derivedType">
15 <xs:extension base="baseType">
16 <xs:attribute name="attrB" type="xs:string" use="required"/>