title: java XPath api reference
body: <p>The java standard tutorial <a href="http://download.oracle.com/javase/tutorial/jaxp/xslt/xpath.html" rel="nofollow">http://download.oracle.com/javase/tutorial/jaxp/xslt/xpath.html</a> explains the XPath standard itself but not the java api for XPath. I need:<br/></p>
  
  <p>1) I know XPath syntax, that is how to reference /person/dateofbirth element. What is the java api to select this node and get its text content? <br/>
  2) can I obtain DOM objects via XPath? <br/>
  3) is somewhere an official tutorial to the api and not to the xpath itself? <br/>
  The real question is the 3rd point since the issue is having official and first-hand information as a base. </p>