title: What does it mean for a breakpoint to be installed?
body: <p>The <a href="http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm" rel="noreferrer">documentation for Eclipse</a> states that a blue circle icon represents an</p>
  
  <blockquote>
    <p>enabled line breakpoint</p>
  </blockquote>
  
  <p>and that a checkmark is an</p>
  
  <blockquote>
    <p>adornment that marks a line breakpoints as installed</p>
  </blockquote>
  
  <p>What's the difference between active, installed and enabled, when referring to breakpoints?  Is installed -- in this case -- an Eclipse-specific definition?</p>