问题
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 attribute, say xmlns:f="...", and when you type <f: you automatically get the tags under the f namespace.
I want to define my own namespace with a list of tags and attributes for every tag.
How do I define it?
回答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.
来源：https://stackoverflow.com/questions/7661381/how-to-define-a-namespace-in-xml