The main topic in this chapter is the customization of Solr. This goes from the adoption of language specific configurations to identifying what are the most commonly used tools for expanding queries by using some techniques derived from natural language processing, linguistic, or information retrieval.

Even if we did not go in detail, it's important to design the scenario and the options for our hypothetical Solr customizations.

And I hope this will all inspire you and let you begin your journey into some of the advanced topics, such as NLP and semantic search, which we can only suggest here.