Validate Xml without using xmlns

[tprakash]

Hi, I have the xml document like, <?xml version="1.0" encoding="utf-8"?> <Drive> <folders> <folder name="f1"> </folder> <folder name="f2"> </folder> </folders> </Drive> Please notice that there is no xmlns used and I cannot used xmlns in this xml document. I have problem creating schema (.xsd) file to validate this xml document. My schema is like <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.tempuri.com/temp" elementFormDefault="qualified"> <element name="Drive"> <complexType> <sequence> <element ref="folders" minOccurs="0" maxOccurs="1"/> </sequence> </complexType> </element> <element name ="folders"> <complexType> <sequence minOccurs ="0" maxOccurs ="unbounded"> <element ref ="folder"/> </sequence> </complexType> </element> <element name ="folder"> <complexType> <sequence> <element ref ="folders" minOccurs ="0" maxOccurs="1" /> </sequence> <attribute name ="name" type="string" /> </complexType> </element> </schema> But the ref attribute is not working. ie the attribute 'folders' cannot reference the element 'folders'. I am using VS2008 to create/edit xsd file. VS2008 shows warning message "The 'http://www.w3.org/2001/XMLSchema:folders' element is not declared.". The same exception occurs if I run my c# program to valid the xml. Could you please suggest me how to refernce element using ref attribute without using namespace? Is there any other workaround? Thanks. Prakash

[Stuart Dootson]

I may have steered you wrong before saying that ref didn't work without namespaces. I think they do, but there are a few things that need to change before your schema could possibly work:

1. Remove the targetNamespace attribute - this is the namespace that the elements your defining in the schema (Drive, folder

2. You need to change the default namespace declaration to be a named namespace:

   <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

   and prefix all elements that come from the XML Schema namespace with the namespace prefix you choose (xs in this case)

Oh and one other thing - learn about XML namespaces, what they imply and how they interact with XML Schemas. You need to know this stuff if you're going to design XML Schemas - you need to know it if you're working with XML!

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

[Roll 1]

You have referenced the element 'folders' before it was described in your xml that is why you are getting this error. Try changing the order in your xml . <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.tempuri.com/temp" elementFormDefault="qualified"> &lt;element name ="folders"&gt; &lt;complexType&gt; &lt;sequence minOccurs ="0" maxOccurs ="unbounded"&gt; &lt;element ref ="folder"/&gt; &lt;/sequence&gt; &lt;/complexType&gt; &lt;/element&gt; <element name="Drive"> <complexType> <sequence> <element ref="folders" minOccurs="0" maxOccurs="1"/> </sequence> </complexType> </element> <element name ="folder"> <complexType> <sequence> <element ref ="folders" minOccurs ="0" maxOccurs="1" /> </sequence> <attribute name ="name" type="string" /> </complexType> </element> </schema> Regards Akhila