title: Read XML value based on attribute
body: <p>I have a XML file as below :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; 
  &lt;?xml-stylesheet type="text/xsl" href="XSLFILE.xslt"?&gt;
  &lt;books&gt;
    &lt;book ISBN="0321173481" author="Michael R. Sweet" &gt;Book1&lt;/book&gt;
    &lt;book ISBN="0849371643" author="Gerald Farin" &gt;Book2&lt;/book&gt;
    &lt;book ISBN="A558606696" author="David Rogers" &gt;Book3&lt;/book&gt;
    &lt;book ISBN="1568810849" author="Gerald Farin" &gt;Book4&lt;/book&gt;
  &lt;/books&gt;
  </code></pre>
  
  <p>I want to get the name of book (book1/book2/book3/book4) based on attribute value (ISBN or author) using XSLT.</p>
  
  <p>Suppose if I write <code>ISBN = 0321173481</code> then I should get value : <code>book1</code>.</p>
  
  <p>Can anybody help me?</p>
  
  <p>Thanks</p>