nokogiri example

n.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'nokogiri'

doc = Nokogiri::XML open 'fbsdtest.xml'
os_type = doc.xpath('//os/type')
p os_type
puts os_type[0].attribute('arch')

__END__

marvin:~ oogali$ ruby n.rb
[#<Nokogiri::XML::Element:0x80cd3540 name="type" attributes=[#<Nokogiri::XML::Attr:0x80cd3464 name="arch" value="i686">, #<Nokogiri::XML::Attr:0x80cd3450 name="machine" value="rhel6.2.0">] children=[#<Nokogiri::XML::Text:0x80cd2e38 "hvm">]>]
i686