ETO features Autodesk Intent technology to author and run rules:
Intent Design Editor
Browse designs and functions, and view and edit your Intent Language code.
Design Source Editor
Edit the Intent Language source code. Context menus and templates help streamline the editing process.
Dynamic Rule Editor
The Dynamic Rule Editor is like the Design Source Editor, but does not have a menu, toolbar, and Designs/Functions panels. The Dynamic Rule Editor is a single document interface.
ETO Part Editor
Edit parameter values, specify the part name, and view the parameters by category or in alphabetical order.
When you define a parameter in the Design Source Editor, you can specify a range of predetermined values using the Choices annotation. In the Part Editor, only the available choices that are valid for that parameter display in a drop-down list.
Annotations control the appearance of parameters in the Part Editor (and other user interfaces). Settings in the Part Editor control the appearance and behavior of the Part Editor dialog box.