title: What are the differences between DOM, SAX and StAX XML parsers?
body: <p>I'm developing a RSS feed aggregator with Apache Tomcat. I was wondering which parser to use in order to read RSS feeds. Should I use DOM, SAX or StAX? I know that there are libraries specific to read RSS feeds with java but since this is a university project I am not supposed to use those. 
  Thank you.</p>