title: Solr6 Querying multiple cores and normalizing scores
body: <p>I have multiple cores(in different languages) that share the same structures/schemas.
  I send the same query to each of the cores and return results that I then save into a new core called "results". I have a custom q parser plugin that saves scores so that that the results core can be ordered by the scores from the other cores.</p>
  
  <p>Does it make sense to compare the scores from different collections? If I were to normalize the scores between 0 and 1 by dividing by the maximum score would this make the scores from the individual cores comparable for a particular query?</p>
  
  <p>What would be the best way to make the scores normalized and comparable?</p>
  
  <p>Apparently, the join command gives each of the results the same score.  </p>
  
  <p>Thank you.</p>