Question about XML validation against schema

Question

My question is probably a basic one about XML. I tried PurchaseOrder example from the book "J2EE Web Services" by Richard Monson-Haefel. A simplified version as followings -
Address.xsd -
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://xml.netbeans.org/schema/Address"
xmlns:addr="http://xml.netbeans.org/schema/Address"
elementFormDefault="qualified">
<element name="address" type="addr:USAddress" />
<complexType name="USAddress">
<sequence>
<element name="name" type="string" />
<element name="street" type="string" />
<element name="city" type="string" />
<element name="state" type="string" />
<element name="zip" type="string" />
</sequence>
</complexType>
</schema>
PurchaseOrder.xsd -
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://xml.netbeans.org/schema/PurchaseOrder"
xmlns:po="http://xml.netbeans.org/schema/PurchaseOrder"
xmlns:ad="http://xml.netbeans.org/schema/Address"
elementFormDefault="qualified">
<import namespace="http://xml.netbeans.org/schema/Address" schemaLocation="Address.xsd" />
<element name="purchaseOrder" type="po:PurchaseOrder" />
<complexType name="PurchaseOrder">
<sequence>
<element name="accountName" type="string" />
<element name="accountNumber" type="unsignedShort" />
<element name="shipAddress" type="ad:USAddress" />
<element name="total" type="float" />
</sequence>
<attribute name="orderDate" type="date" />
</complexType>
</schema>
Then PurchaseOrder.xml is -
<purchaseOrder orderDate="2007-12-12"
xmlns='http://xml.netbeans.org/schema/PurchaseOrder'
xmlns:addr="http://xml.netbeans.org/schema/Address"
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xsi:schemaLocation='http://xml.netbeans.org/schema/PurchaseOrder ../xsd/PurchaseOrder.xsd'>
<accountName>Starwood</accountName>
<accountNumber>220</accountNumber>
<shipAddress>
<name>Data Center</name>
<street>1501 Washington St.</street>
<city>Braintree</city>
<state>MA</state>
<zip>02148</zip>
</shipAddress>
<total>250</total>
</purchaseOrder>
Then I did a XML validation but have this error -
cvc-complex-type.2.4.a: Invalid content was found starting with element 'name'. One of '{"http://xml.netbeans.org/schema/Address":name}' is expected. [19]
It complains <name> tag in <shipAddrss> needs namespace of "http://xml.netbeans.org/schema/Address". Why?
Is it possible to change XML so it does not need name space for elements inside <shipAddress>?
Thanks

Answer 1

Hi Madhura,
see here my comparison of the web version against the local file version on my Windows box (which is itself not the fastest): It makes a factor 16 in difference!
C:\Temp\xsdvalidator>java XsdValidator madhu.xsd madhu.xml
cvc-pattern-valid: Value 'provamail.it' is not facet-valid with respect to patte
rn '[^@]+@[^.]+[.].+' for type 'EmailType'.
NOK - Validation error
Elapsed time: 16353 ms
C:\Temp\xsdvalidator>java XsdValidator madhu_local.xsd madhu.xml
cvc-pattern-valid: Value 'provamail.it' is not facet-valid with respect to patte
rn '[^@]+@[^.]+[.].+' for type 'EmailType'.
NOK - Validation error
Elapsed time: 994 ms
Obviously, the w3c.org domain that you specified as ressource location is very slow - and, as the FAQ shows, this delay is intentional!
The W3C servers are slow to return DTDs. Is the delay intentional?
Yes. Due to various software systems downloading DTDs from our site millions of times a day (despite the caching directives of our servers), we have started to serve DTDs and schema (DTD, XSD, ENT, MOD, etc.) from our site with an artificial delay. Our goals in doing so are to bring more attention to our ongoing issues with excessive DTD traffic, and to protect the stability and response time of the rest of our site. We recommend HTTP caching or catalog files to improve performance.
--> They don't want to have requests to their site from productive servers all around the world.
Regards,
Rüdiger