xml学习中出现的错误

1、org.xml.sax.SAXParseException: src-element.3: Element 'UC4' has both a 'type' attribute and a 'anonymous type' child. Only one of these is allowed for an element.

　　　　

XML File:

<UC4Execution>
        <Script>JOB_NAME</Script>
        <UC4 Server="UC4.com" Client="123" UserId="123" Password="*****" >
        </UC4 >

</UC4Execution>

XSD File :

        <xs:element name="UC4Execution">
                <xs:complexType>
                <xs:sequence>

                    <xs:element name="Script" type="xs:string"/>
                    <xs:element name="UC4" type="xs:string" minOccurs="0">
                    <xs:complexType>
                        <xs:attribute name="Server" type="xs:string" use="required"/>
                        <xs:attribute name="Client" type="xs:string" use="required"/>
                        <xs:attribute name="UserId" type="xs:string" use="required"/>
                        <xs:attribute name="Password" type="xs:string" use="required"/>
                    </xs:complexType>
                    </xs:element>

                </xs:sequence>
                </xs:complexType>
            </xs:element>
原因：当一个元素包含属性和文本时不能这样写

正确写法

<xs:element name="UC4" minOccurs="0">
  <xs:complexType>
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="Server" type="xs:string" use="required"/>
        <xs:attribute name="Client" type="xs:string" use="required"/>
        <xs:attribute name="UserId" type="xs:string" use="required"/>
        <xs:attribute name="Password" type="xs:string" use="required"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
</xs:element>