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Top Hits aggregation
editTop Hits aggregation
editA top hits metric aggregation keeps track of the most relevant document being aggregated. This aggregator is intended to be used as a sub aggregator, so that the top matching documents can be aggregated per bucket.
The top hits aggregation can effectively be used to group result sets by certain fields via a bucket aggregation. One or more bucket aggregations determines by which properties a result set get sliced into.
Refer to the original docs for more information.