How to add more attributes in DOMImplementation::createDocument

[Wei Zheng]

For example I need something like below:

<RootElem
xmlns="http://www.abc.com/XMLSchema/product";
xmlns:xs="http://www.w3.org/2001/XMLSchema-instance";
xs:schemaLocation="http://www.abc.com/XMLSchema/product.xsd";
xmlns:pr_attr="http://www.abc.com/XMLSchema/product"; pro_attr:ver="1.0">
<CommonElem>
...
</CommonElem>
</RootElem>

It seems that I can only add the "qualified Name" (xmlns part). How about I
want to add xmlns:xs, xs:schemaLocation, and my customized attributes to the
root element?

Thanks in advance!
Wei