title: What is difference between -Dwtpversion and wtpversion?
body: <p>I am new to Maven. I am going to develop my first application in with Maven. So while reading the documentation I found <code>mvn eclipse:eclipse -Dwtpversion=2.0</code></p>
  
  <p>I know <a href="http://projects.eclipse.org/projects/webtools" rel="noreferrer">WTP</a> is the "Web Tools platform", but what is <code>-Dwtpversion</code>? I searched on the Internet, but didn't find anything. </p>