Definition

The process of manually or automatically adding tags or annotation to various components of unstructured data as one step in the process of preparing such data for analysis. Tagging takes place at a more granular level than categorization, and may offer additional benefits in terms of insight.

Comments

see metadata; Metadata tagging has traditionally been a manual and often laborious process. It was mainly executed through a rule-based system encoded by a specific knowledge worker or subject matter expert (SME) alongside software engineers. Rule-based tagging focuses on tagging recognizable elements clearly defined within the content.

Source

innodata.com

NESDIS Data Management Lexicon and Related Terms 

Category

4. Data Stewardship words