xmlAddNs

doc = xmlDocument("TMPDIR/foo.xml");
doc.root = xmlElement(doc, "root");
a = xmlElement(doc, "a");
b = xmlElement(doc, "b");
ns_scilab = xmlNs(a, "scilab", "http://www.scilab.org");
ns_balics = xmlNs(a, "balics", "http://gro.balics.www");
xmlAddNs(b, ns_scilab, ns_balics);
doc.root.children(1) = a;
doc.root.children(2) = b;
xmlDump(doc)
xmlDelete(doc);