xsi:type in the XML instance

[Jaikrishnan Pillai]

Hi ,

I am trying to do a schema validation using Xerces(version 2.2.1).The xml I have is

 

<getCustomerID xmlns="http://www.vordel.com/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xsi:schemaLocation="http://www.vordel.com/ file:///E:/TMobile/samplemessages/new/test/tony/test.xsd"
xsi:type="xsd:string">Error
</getCustomerID>

 

 

and the schema I have is

 

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema targetNamespace="http://www.vordel.com/"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:tns="http://www.vordel.com/">

 

<xsd:element name="getCustomerID">
     <xsd:simpleType>
        <xsd:restriction>
                   <xsd:simpleType>
                     <xsd:union memberTypes="xsd:string"/>
                   </xsd:simpleType>
                   <xsd:enumeration value="JK" />
                   <xsd:enumeration value="DAVE" />
        </xsd:restriction>
      </xsd:simpleType> 

</xsd:element>

 

<xsd:simpleType name="derived_string">
   <xsd:restriction base="xsd:string">
     <xsd:enumeration value="JK" />
     <xsd:enumeration value="DAVE" />
   </xsd:restriction>
</xsd:simpleType>
</xsd:schema> 

 

Now what i want my schema to achieve is to restrict the value to either "DAVE" or "JK".Also note the xsi:type attrbute in the schema.

Even if the value is different I am still able to validate the schema. Is this the expected beahaviour?

 

Now if I take away the xsi:type="xsd:string" from the xml.Then it will try to validate the content and gives me the correct exception.

Now I need to have  type attribute as the Web service rquires it.So I want to build up a schema for the same.

 

I changed the schema to use <xsd:union memberTypes="tns:derived_string"/>

then it gives me a error

org.xml.sax.SAXParseException: cvc-elt.4.3: Type 'xsd:string' is not validly derived from the type definition of element 'getCustomerID'.

 

Can someone help me out.I want to know how does schema validation differ when there is xsi:type attribute in xml itself.

 

Thanks,

JK