[xml] self-defined namespace nodes

[Roopesh Chander <roop forwardbias in>]

I need a bit of help with use of namespaces in the xml tree creation 
interface (xmlNewDoc et al.). Specifically, I need to be able to create 
a an xml root element in a self-defined namespace, like this:

<h:html xmlns:h="http://www.w3.org/HTML/1998/html4";>
something...
</h:html>

Per the api, to create the root element with a namespace, I've gotta 
call xmlNewNode with an xmlNs* argument. But to create an xmlNs, i need 
to call xmlNewNs, which needs the xml element where we want the xmlns 
tag to be added (the root element in this case, which we haven't created 
yet). What is the indended way of creating such an element using the 
libxml2 tree api?

My present cowardly code includes the namespace in the name, like:

xmlNode* rootelem = xmlNewNode(NULL, (xmlChar *) "h:html");
xmlNs* hNs = xmlNewNs(rootelem,
              (xmlChar *) "http://www.w3.org/HTML/1998/html4";,
              (xmlChar *) "h");

But ideally, I should be calling
xmlNode* rootelem = xmlNewNode(hNs, (xmlChar *) "html");
which I cant.

Thanks,
roop.