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The Metadata Fields to return as are specified by joining the sets of the dotted keys specified asprovided by
All the fields linked with the explicitly providedProfiles
An explicit set of dotted keys
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It reduces the load on the underlying search engine by requesting less metadata and hence improves the general responsiveness of the search engine
It reduces the API response time because the underlying search engine returns results much faster and reduces JSON processing times
It reduces the size of returned metadata and hence the download time of the API response
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