title: Focused crawling from nutch
body: <p>I am using nutch 1.2 and solr 3.1.0 and a NUTCH-828-1-20100608 patch for fetch filter.</p>
  
  <p>I don't understand how to filter the fetch, nor do I understand how the patch works. <a href="http://lucene.472066.n3.nabble.com/Focused-crawling-with-nutch-td3656343.html" rel="nofollow">This link</a> helped me patch the file.</p>