Hello,

  1. In which cases the "applying index" phrase should I see in the query plan? I have an old query (the one I've sent here at 06/22/2015) where only for one condition I've seen "applying index", and even this one doesn't appear anymore using a newer (8.2.2) version of BaseX and a larger database. I do see the right properties of the db:
    Indexes
     Up-to-date: true
     TEXTINDEX: true
     ATTRINDEX: true
  2. Only once a value which is mentioned in the query is found in the index, in case of "=" condition?
  3. Always, in case of "<" or "<" condition, assuming the specific text/attribute has been indexed?
  4. Everything I see as a reply to index:facets is indexed, right? 

-- 
With kind regards,
Menashè