Hi, WebRatio 7.2 uses the IFML notation, which is a new OMG standard language.
For this reason the components names and icons have changed.
If you look in the WebRatio installation directory you should have a folder named "job aids".
In this folder you find a document "Migrating from WebML to IFML" that shows you which is the corresponding element of the Data Unit, which is the Details Component.