title: Can't find the "org.eclipse.persistence" Maven dependency
body: <p>I installed Eclipse Helios with the m2eclipse maven plugin.</p>
  
  <p>I want to create an application using JPA. So, what I do is: New > Maven Project then I select the maven default archetype.</p>
  
  <p>The problem is that I want to add the "org.eclipse.persistence" dependency that I can't find.
  Where is it? Can we add it manually? Should I update a sort of "repository"?</p>
  
  <p>Then, is it the right archetype that I'm using?</p>