Defining rules and ruleset hierarchy
Your newly-created application contains a number of application rules that define ordered sets of rulesets and versions that identify the parts of an application layer.
In Dev Studio, click.
Review the built-in structure and identify additional rules that are needed for your application.
The RuleSet Stack tab displays your newly-created application and all of the applications on which the application is built. It also shows the high-level ruleset stack for each of the application rules defined in the application.