University of Dallas: Textual Analysis Tool
Welcome to the University of Dallas Textual Analysis Tool (UDTAT). The TAT provides interactive visual analyses of classic texts with with side-by-side commentary. The TAT was created by University of Dallas faculty members and is still under development. At present the TAT contains one text, Aristotle’s Categories, which can be viewed using the TAT Reader.

For best results, please use an up-to-date version of Mozilla Firefox or Microsoft Edge to load the UDTAT. Google Chrome may also be used.

View Aristotle’s Categories

For textual inquiries, please contact Dr. Christopher Mirus at For technical questions, please contact Joseph Malone at