title: I need help extracting values from xml in ruby/rails
body: <p>I am working on personal project and using Rails to learn the framework.  The project is music based and I'm using ChartLyrics.com's API to retrieve song lyrics.  The API returns XML and I am having trouble extracting the actual lyric element from the XML.  </p>
  
  <p>I have installed the Nokogiri gem to help parse the XML.  The following is what I'm using to retrieve the data.  From the rails console:</p>
  
  <pre><code>doc = Nokogiri::XML(open(http://api.chartlyrics.com/apiv1.asmx/SearchLyricDirect?artist=michael%20jackson&amp;song=bad))
  puts doc
  
  &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;GetLyricResult xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://api.chartlyrics.com/"&gt;
    &lt;TrackId&gt;0&lt;/TrackId&gt;
    &lt;LyricChecksum&gt;a4a56a99ee00cd8e67872a7764d6f9c6&lt;/LyricChecksum&gt;
    &lt;LyricId&gt;1710&lt;/LyricId&gt;
    &lt;LyricSong&gt;Bad&lt;/LyricSong&gt;
    &lt;LyricArtist&gt;Michael Jackson&lt;/LyricArtist&gt;
    &lt;LyricUrl&gt;http://www.chartlyrics.com/28h-8gWvNk-Rbj1X-R7PXg/Bad.aspx&lt;/LyricUrl&gt;
    &lt;LyricCovertArtUrl&gt;http://ec1.images-amazon.com/images/P/B000CNET66.02.MZZZZZZZ.jpg&lt;/LyricCovertArtUrl&gt;
    &lt;LyricRank&gt;9&lt;/LyricRank&gt;
    &lt;LyricCorrectUrl&gt;http://www.chartlyrics.com/app/correct.aspx?lid=MQA3ADEAMAA=&lt;/LyricCorrectUrl&gt;
    &lt;Lyric&gt;
       Because I'm bad (bad-bad), I'm bad, come on (really, really bad)
       You know I'm bad (bad-bad), I'm bad, you know it (really, really bad)
       You know I'm bad (bad-bad), I'm bad, you know it (really, really bad) you know
       And the whole world has to answer right now
       Just to tell you once again
    &lt;/Lyric&gt;
  &lt;/GetLyricResult&gt;
  </code></pre>
  
  <p>I shortened the lyrics to save space.  How do I extract the 'Lyric' element?  I've tried all of the following:</p>
  
  <pre><code>&gt; lyrics = doc.xpath('//Lyric')
  =&gt; []
  
  &gt; lyrics = doc.xpath('/Lyric')
  =&gt; []
  
  &gt; lyrics = doc.xpath('//GetLyricResult/Lyric')
  =&gt; []
  
  &gt; lyrics = doc.xpath('//GetLyricResult//Lyric')
  =&gt; []
  
  &gt; lyrics = doc.xpath('/GetLyricResult/Lyric')
  =&gt; []
  </code></pre>
  
  <p>'lyrics' is nil everytime.  Can anyone tell me what I'm doing wrong?  Thanks</p>