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Here, we have given it a type = "text"“text”, which in the default schema is analyzed. 

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Once we have created a field named language to store the unanalyzed data in, we'll we’ll use copyField to copy the dwc.language field into the language field which will happen during indexing before it is analyzed. Notice the type is now defined as a string. We can now use these fields in solr request handlers.  Request handlers determine what fields to search and what to return, and you can assign certain fields more weight than others.

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In the qf , we are searching fields like dwc.type and dwc.language and they are all weighted the same. We can tweak the weights later if we wish to customize the results. Solr returns are the fields in <str name="fl"> ”fl”> element.  This gives us nice values to use when displaying the results and when listing facets.