JoJo：
xs:choice, minOccurs
[阅读: 525] 2005-06-17 07:48:56
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="Root">
<xs:complexType>
<xs:choice>
<xs:element name="Child" minOccurs="0"/>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
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