XSD question

Question

Sorry for my newbie-ness, but could someone help me with a little XSD?
Suppose I have XML like:
<list>
  <item type="stock">12345</item>
  <item type="other">foo</item>
</list>When the item element has an attribute of stock, the element content should be an integer. When the item element has an attribute of other, the element content should be either 'foo' or 'bar'. I had defined two different types like:
<xs:complexType name="stockType">
  <xs:simpleContent>
    <xs:extension base="xs:integer"/>
  </xs:simpleContent>
</xs:complexType>
<xs:complexType name="otherType">
  <xs:simpleContent>
    <xs:restriction base="xs:string">
      <xs:enumeration value="foo"/>
      <xs:enumeration value="bar"/>
    </xs:restriction>
  </xs:simpleContent>
</xs:complexType>Now, I was trying to combine these like:
<xs:element name="list">
  <xs:complexType>
    <xs:sequence maxOccurs="unbounded">
      <xs:choice>
        <xs:element name="item" type="stockType"/>
        <xs:element name="item" type="otherType"/>
      </xs:choice>
    </xs:sequence>
  </xs:complexType>
</xs:element>But it doesn't like the fact that each choice uses the 'item' element.
Anyone have a better idea of how I should do this?
Thanks, Neil

Answer 1

Thanks for all the help. Unfortunately, my original example was not complete. The stockType and otherType complexType's needed to define an attribute element, as shown below:
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
     <xs:element name="list">
          <xs:complexType>
               <xs:choice>
                    <xs:sequence maxOccurs="unbounded">
                         <xs:element name="item" type="stockType"/>
                    </xs:sequence>
                    <xs:sequence maxOccurs="unbounded">
                         <xs:element name="item" type="otherType"/>
                    </xs:sequence>
               </xs:choice>
          </xs:complexType>
     </xs:element>
     <xs:complexType name="stockType">
          <xs:simpleContent>
               <xs:extension base="xs:integer">
               <xs:attribute name="type" fixed="stock"/>
               </xs:extension>
          </xs:simpleContent>
     </xs:complexType>
     <xs:complexType name="otherType">
          <xs:simpleContent>
               <xs:restriction base="xs:string">
                    <xs:enumeration value="foo"/>
                    <xs:enumeration value="bar"/>
                    <xs:attribute name="type" fixed="other"/>
               </xs:restriction>
          </xs:simpleContent>
     </xs:complexType>
</xs:schema>Unfortunately, this fails to find the following simple file valid:
<list xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="E:\JAVA\jaxb\list.xsd">
     <item type="stock">12345</item>
     <item type="other">foo</item>
</list>It produces the following error in XML Spy:
Bad attribute for fixed attribute/element 'type' - must be 'stock'
Sorry to be a pain :( Don't waste any more time looking at this, but thanks for your efforts already :)