title: Apache Nutch fetch and updatedb stages
body: <p>I've got a question about the way Nutch obtains links to update the crawldb with.</p>
  
  <p>The command in question is <code>bin/nutch updatedb crawl/crawldb $s1</code></p>
  
  <p>I need to write a custom parser, before doing so I've examined Nutch's source code and as far as I'm concerned I'm responsible for providing the links to update the crawldb, by extracting it from the document and putting in as Outlink[] in the ParseData. At least that's what I understood from <a href="https://github.com/apache/nutch/blob/master/src/plugin/parse-html/src/java/org/apache/nutch/parse/html/HtmlParser.java" rel="nofollow noreferrer">this</a>.</p>
  
  <p>Correct me if I'm wrong, because I wouldn't like my crawler to stop after the first iteration, as it wouldn't have links to update the crawldb.</p>