In this chapter, we looked at the basic concepts of mapping and reviewed the basic definitions—what the metadata fields are, how does mapping control them—and we examined some data types. Then we looked at the relationship between mapping and relevant search results. Finally, we tried to understand correctly the meaning of schema-less by asking the question: Is the claim about "Elasticsearch stands for the schema-free model" always true?
In the next chapter, you'll learn about the analysis module and analyzers. In addition, we will examine the questions—what is the analysis process? What do the underlying Tokenizer, Token, and CharFilters make?—and some other concepts related to this topic.
