gistfile1.rb

if RUBY_PLATFORM =~ /java/
  ENV["GEM_HOME"] = ENV["GEM_PATH"] = nil
  require 'rubygems'
  gem 'nokogiri' 
end

require 'nokogiri'

doc = Nokogiri::XML.parse(DATA.read, nil, 'utf-8')
p doc.errors
puts doc.to_xml


__END__
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book SYSTEM "unused.dtd">
<book code="_authorinfo" in-beta="yes">

<processedcode language="ruby" size="normal">
<codeline><cokw>class</cokw> Fred &lt; Preprocessor</codeline>
<codeline>  <cokw>def</cokw> map(line)</codeline>
<codeline>    line.gsub(%r{&lt;ror/>}, <costring>"Ruby on Rails"</costring>)</codeline>
<codeline>  <cokw>end</cokw></codeline>
<codeline><cokw>end</cokw></codeline>
</processedcode>

</book>