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We’re overhauling Dgraph’s docs to make them clearer and more approachable. If you notice any issues during this transition or have suggestions, please let us know.
With the @normalize directive, Dgraph returns only aliased predicates and flattens the result to remove nesting. Query Example: film name, country, and first two actors (by UID order) of every Steven Spielberg movie, without initial_release_date because no alias is given, and flattened by @normalize. 
{ director(func:allofterms(name@en, "steven spielberg")) @normalize {
  director: name@en
  director.film {
    film: name@en initial_release_date starring(first: 2) {
        performance.actor { actor: name@en }
        performance.character { character: name@en }
      }
      country { country: name@en }
    }
  }
}
You can also apply @normalize on nested query blocks. It works similarly but only flatten the result of the nested query block where @normalize has been applied. @normalize returns a list irrespective of the type of attribute on which it’s applied. 
{ director(func:allofterms(name@en, "steven spielberg")) {
  director: name@en
  director.film {
    film: name@en initial_release_date starring(first: 2) @normalize {
      performance.actor { actor: name@en }
      performance.character { character: name@en }
    }
    country { country: name@en }
  }
}