In this chapter, we learned the concept of relevance and its terms: Precision and Recall. Then we looked at the velocity search UI. We saw the common parameters for various query parsers and explored each query parser (standard, DisMax, and eDisMax) in detail. After that, we looked at various response writers in detail: JSON, standard XML, CSV, and velocity response writer.  We also explored Solr term modifiers, wildcard parameters, fuzzy search, proximity search, and range search.

We looked at all Boolean operators. Then we learned about various faceting parameters and faceting types such as range, pivot, and interval faceting. At the end, we saw Solr highlighting mechanisms, parameters, highlighters, and boundary scanners.

In the next chapter, or rather the second part of this chapter, we will learn more search functionalities such as spell checking, suggester, pagination, result grouping and clustering, and spatial search.