Which of the following is NOT a method of data discovery?

User-based data discovery is not typically recognized as a formal method of data discovery. Methods for data discovery focus on how data is identified and retrieved based on its characteristics or tags.

Content-based data discovery involves analyzing the actual content of the data to identify and classify it, which can help organizations find sensitive information within their data repositories. Label-based data discovery relies on tags or labels assigned to data, which can facilitate the identification of data types or confidentiality levels. Metadata-based discovery focuses on the metadata associated with data, such as descriptions, creation dates, and authorship, to assist in categorizing and understanding the data better.

In contrast, user-based discovery does not fit into these established categories since it typically refers to actions taken or queries made by users rather than a method of classifying or identifying data based on specific attributes or characteristics. As a result, user-based discovery does not embody the systematic approach associated with the other methods listed.