We started our journey from the need to search for information that we have stored. We looked at the history of information retrieval and learned about a Lucene library and products based on it. Next, we turned our attention to generate some data to index. Then we learned how indexing works, what an index is, document and what fields are and how many types of fields are available. After that, we turned our attention towards indexing the data. After indexing, we moved to querying the index. We learned that there are global queries and we can be specific by naming the fields we want to filter on. We also learned about Boolean operations and operators available for each field type. After all that, we looked into sorting and iterating over results.

We then looked into faceted search where we can categorize and summarize the documents that we have. Lastly, we mentioned the prospective search and how it reverses the direction of search.

In the next chapter, we are going to take a look at...