title: Compare Elasticsearch query score across multiple queries
body: <p>I'm trying to query and compare two MLT queries scores but am a bit confused based on what I read here
  <a href="https://www.elastic.co/guide/en/elasticsearch/guide/current/practical-scoring-function.html" rel="nofollow noreferrer">https://www.elastic.co/guide/en/elasticsearch/guide/current/practical-scoring-function.html</a></p>
  
  <blockquote>
    <p>Even though the intent of the query norm is to make results from
    different queries comparable, it doesn’t work very well. The only
    purpose of the relevance _score is to sort the results of the current
    query in the correct order. <strong>You should not try to compare the
    relevance scores from different queries</strong>.</p>
  </blockquote>
  
  <p>if I ran an MLT query and document 'A' is similar to document 'B' and the score is 0.4 and conversely, 
  running the MLT query document 'B' is similar to document 'A' and its score is 2.4.</p>
  
  <p>I would expect the score to be the same based on the tokens matched in the MLT, but that's not the case.</p>
  
  <p>Also, 
  if I ran an MLT query and document 'A' is similar to document 'B' and the score is 0.6 and 
  running another MLT query document 'C' is similar to document 'A' and its score is 4.7.</p>
  
  <p>So my questions are:</p>
  
  <ol>
  <li>Does this imply that C is much more similar to A than B ?</li>
  <li>Also, what's the best way for me compare multiple queries in elasticsearch when the scores are different?</li>
  </ol>
  
  <p>Thanks,
  - Phil</p>