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@@ -5,7 +5,7 @@ experimental[The ranking evaluation API is experimental and may be changed or re
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The ranking evaluation API allows to evaluate the quality of ranked search
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results over a set of typical search queries. Given this set of queries and a
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-list or manually rated documents, the `_rank_eval` endpoint calculates and
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+list of manually rated documents, the `_rank_eval` endpoint calculates and
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returns typical information retrieval metrics like _mean reciprocal rank_,
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_precision_ or _discounted cumulative gain_.
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