In summary

The ubiquitous response form typically has two parts – a structured set of boxes and a place for comments. In many surveys the really interesting information from the survey comes from the comments. The structured set of boxes pre-supposes what the respondent is thinking while the comments form allows for free expression.

There usually are too many responses to a survey for the comments to be read and cogently analyzed by an individual. The way that the comments on a survey can be analyzed is through textual ETL. Textual ETL reads the comments, analyzes them, and places the comments in a standard database. From the database the comments are analyzed and turned into a visualization.