perldoc > XML::XPath::Node::Namespace(3pm)

NAME
    Namespace - an XML namespace node

API
  new ( prefix, expanded )
    Create a new namespace node, expanded is the expanded namespace URI.

  getPrefix
    Returns the prefix

  getExpanded
    Returns the expanded URI

  toString
    Returns a string that you can add to the list of attributes of an element:
    xmlns:prefix="expanded"