1<?xml version="1.0" encoding="ISO-8859-1" ?> 2 3<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> 4 5 <xs:element name="foo"> 6 <xs:complexType> 7 <xs:choice minOccurs="0" maxOccurs="unbounded"> 8 9 <xs:element name="barA" > 10 <xs:complexType> 11 <xs:attribute name="attr" type="xs:string" use="required" /> 12 </xs:complexType> 13 </xs:element> 14 15 <xs:element name="barB" > 16 <xs:complexType> 17 <xs:attribute name="attr" type="xs:string" use="optional" /> 18 </xs:complexType> 19 </xs:element> 20 21 <xs:element name="barC" > 22 <xs:complexType> 23 <xs:attribute name="attr" type="xs:string" use="prohibited" /> 24 </xs:complexType> 25 </xs:element> 26 27 </xs:choice> 28 </xs:complexType> 29 </xs:element> 30 31</xs:schema> 32 33