Method: REXML::Element#namespace

Defined in:

lib/rexml/element.rb

#namespace(prefix = nil) ⇒ Object

:call-seq:

namespace(prefix = nil) -> string_uri or nil

Returns the string namespace URI for the element, possibly deriving from one of its ancestors.

xml_string = <<-EOT
  <root>
     <a xmlns='1' xmlns:y='2'>
       <b/>
       <c xmlns:z='3'/>
     </a>
  </root>
EOT
d = REXML::Document.new(xml_string)
b = d.elements['//b']
b.namespace      # => "1"
b.namespace('y') # => "2"
b.namespace('nosuch') # => nil

# File 'lib/rexml/element.rb', line 619

def namespace(prefix=nil)
  if prefix.nil?
    prefix = prefix()
  end
  prefix = (prefix == '') ? 'xmlns' : prefix.delete_prefix("xmlns:")
  ns = namespaces[prefix]

  ns = '' if ns.nil? and prefix == 'xmlns'
  ns
end