title: JSTL: core:redirect gives the error "Unknown tag"
body: <p>I am taking my first steps with Spring and am doing a tutorial.</p>
  
  <p>I am supposed to be redirecting to a page that displays some content using </p>
  
  <blockquote>
    <p>&lt; core:redirect url="/portfolio.htm"/></p>
  </blockquote>
  
  <p>However that page never gets displayed. By navigating directly to the page I can see that it is there and it looks ok.</p>
  
  <p>I get the error in Eclipse "Uknown tag (core:redirect)</p>
  
  <p>I suspect this is giving me the problem, however I have imported the JSTL library and cannot see what I am doing wrong. The only thing I can think of is that core:... has been superseded by something else.</p>