Tags are expressions or phrases that are assigned to a specific body of text (document, article, etc.). These tags characterize the content of the given text. Tags can be entities that appear in the text, or even topics discussed in the text. These tags, as metadata, improve data quality supporting the searchability and the categorization of the text content. The tagging process can be automatic or manual.

The tagging solution developed by Precognox is TAS Tagger.