ruby解析xml文件

1.xml文件如下：
<?xml version="1.0" encoding="UTF-8"?>
<dataroot xmlns:od="urn:schemas-microsoft-com:officedata" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="book1.xsd" generated="2008-12-28T19:12:24">
<book1>
<bianhao>GAR001</bianhao>
<name>计算机组装与维护教程</name>
<借阅时间>2008-03-14T17:23:28</借阅时间>
<author>刘瑞新</author>
<publish>机械工业出版社</publish>
<count>1</count>
<language>中文</language>
<manager>ctec</manager>
</book1>
<book1>
<bianhao>GAR002</bianhao>
<name>计算机接口技术</name>
<借阅时间>2008-03-14T17:27:16</借阅时间>
<author>刘星等</author>
<publish>机械工业出版社</publish>
<count>1</count>
<language>中文</language>
<manager>ctec</manager>
</book1>
<book1>
<bianhao>GAR003</bianhao>
<name>数值分析与算法</name>
<借阅时间>2008-03-14T17:28:50</借阅时间>
<author>徐士良</author>
<publish>机械工业出版社</publish>
<count>1</count>
<language>中文</language>
<manager>ctec</manager>
</book1>
</dataroot>
ruby.rb文件内容：
require 'rexml/document'

xml =REXML::Document.new(File.open"1.xml"
xml.each_element('//book1') do |newbook|
puts newbook.elements['bianhao'].text
puts newbook.elements['name'].text

puts newbook.elements['author'].text

puts newbook.elements['publish'].text
puts newbook.elements['count'].text
puts newbook.elements['language'].text
puts newbook.elements['manager'].text
end