gistfile1.txt

require 'rubygems'
require 'nokogiri'

ATTRIBUTES = ['accelx', 'accely', 'accelz', 'altitude', 
  		  'depth', 'heading', 'lat', 'long', 'pitch', 
			  'pitchrate', 'roll', 'rollrate', 	'yawrate']

f = File.open(ARGV[0])
doc = Nokogiri::XML(f)
f.close


doc.xpath("//entry").each do |entry|
	node_output = ''	
	entry.children.each do |node|
		node_output << "#{node.name}; #{node.content}\n" if ATTRIBUTES.include?(node.name)		
	end
	puts node_output
end