What Is Text Analysis?

Overview

In Elasticsearch, text analysis is the process of converting unstructured text into a structured format optimized for search. This process involves tokenizing the text into individual words, filtering these tokens, and utilizing an inverted index for storage and search operations.

The text analysis process in Elasticsearch occurs at the index and search times. When indexing a text field, Elasticsearch passes it to the analyzer to perform a set of procedures/operations before storing the results in the inverted index. On the other hand, when a user searches on a text field, Elasticsearch again sends it to the search analyzer, which then performs a set of operations and sends the result to compare the data with the inverted index.

We will discuss some essential concepts before diving into text analysis in Elasticsearch.