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Apache Solr Enterprise Search Server - Third Edition by Matt Mitchell, Kranti Parisa, Eric Pugh, David Smiley

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The QueryElevation component

At times, you may desire to make editorial/manual modifications to the search results of particular user queries. This might be done as a solution to a popular user query that doesn't score an expected document sufficiently high—if it even matched at all. The query might have found nothing at all, perhaps due to a common misspelling. The opposite may also be true: the top result for a popular user query might yield a document that technically matched according to your search configuration, but certainly isn't what you were looking for. Another usage scenario is implementing a system akin to paid keywords for certain documents to be on top for certain user queries.

Tip

This feature isn't a general approach to fix queries ...

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