# File lib/xmlsimple.rb, line 881
  def escape_value(data)
    return data if data.nil? || data == ''
    result = data.dup
    result.gsub!('&', '&')
    result.gsub!('<', '&lt;')
    result.gsub!('>', '&gt;')
    result.gsub!('"', '&quot;')
    result.gsub!("'", '&apos;')
    result
  end