Protwords or protected words are a list of words that will be protected from the stemmers.
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With no stemming on the field, if the user searchs the term 'run", only the document 3 will be in the documents list. In the other hand, if an agressive stemmer is in place, most the documents will be on the documents list (different stemmer exist and their choice has a leverage on the documents list).
in In the document 2, running will be transformed in 'run" prefix, in the document 4, runs will be transformed in 'run prefix'.
If we put the term 'running' on the protected words file, the term will be protected for the stemmers in the content_xx (xx is the language) fields of Datafari. So the term running will not turn into 'run' prefix by the stemmer.
ConcretlyConcretely, it means that the user will have to enter the exact term 'running' to retrieve the document that contains this term in a Solr document.
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Once you are ok with your modifications, click on the 'Confirm' button. The modifications are immediately taken into account with no further action (file sent to Zookeeper then a reload of the Solr collection is performed).