Redline publications are valuable in several use cases. They make it easy to see exactly what has changed in the latest document version. They are useful during editing or review but are increasingly seen as valuable publications for the final content reader. But how do you go about creating one? How can you be sure that you’ve found all the changes? This presentation will explore the use of comparison tools alongside the DITA OT to automate the creation of redline publications from two versions of content.