class Nokogiri::XML::Node

def default_namespace=(url)

"xmlns" attribute will appear. See also #namespace and #namespace=
now show up in #attributes, but when this node is serialized to XML an
present in parsed XML. A default namespace set with this method will
The consequence is as an xmlns attribute with supplied argument were
Adds a default namespace supplied as a string +url+ href, to self.
## 
def default_namespace=(url)
  add_namespace_definition(nil, url)
end