How to define a namespace in XML?

Question

I use Eclipse for J2EE programming. In the HTML code, we can use the JSF (or any other) namespaces using the xmlns attribute. Once you specify a namespace using the xmlns attrib

Answer 1

If it's just the namespace, all you need to do is pick a URL that is guaranteed to be unique and use it as your namespace. A common convention is to use a URL under a domain you own, e.g. http://www.idiotguy.com/my-super-xml-namespace.

The namespace by itself doesn't say anything about the document structure though; for that, you need to write a DTD or XSD and link your document to it.