title: OpenRefine: 'Fill Up' replacing values along one column
body: <p>I have following table</p>
  
  <pre><code>╔════════╦════════╦════════╦════════╗
  ║ record ║ Brand  ║ Model  ║ Spec   ║
  ╠════════╬════════╬════════╬════════╣
  ║   1    ║   X    ║ null   ║ 1      ║
  ║        ║   X    ║ DF     ║ 3      ║
  ║        ║   X    ║ null   ║ 5      ║
  ║   2    ║   Y    ║ null   ║ 1      ║
  ║        ║   Y    ║ AB     ║ 3      ║
  ║        ║   Y    ║ null   ║ 5      ║
  ╚════════╩════════╩════════╩════════╝
  </code></pre>
  
  <p>And would like to get following</p>
  
  <pre><code>╔════════╦════════╦════════╦════════╗
  ║ record ║ Brand  ║ Model  ║ Spec   ║
  ╠════════╬════════╬════════╬════════╣
  ║   1    ║   X    ║ DF     ║ 1      ║
  ║        ║   X    ║ DF     ║ 3      ║
  ║        ║   X    ║ DF     ║ 5      ║
  ║   2    ║   Y    ║ AB     ║ 1      ║
  ║        ║   Y    ║ AB     ║ 3      ║
  ║        ║   Y    ║ AB     ║ 5      ║
  ╚════════╩════════╩════════╩════════╝
  </code></pre>
  
  <p>ie. I'm dreaming about something like 'fill up' analogue to the <a href="http://kb.refinepro.com/2012/03/fill-down-right-and-secure-way.html" rel="nofollow noreferrer">fill down tutorial</a> </p>
  
  <p>I haven't found a functionality which covers that out of the box.
  Do you have further information?</p>