Locating the Ruleset 
Procedure
Locating the Ruleset in the Rules Composer
In the Project Explorer view, expand the rules composer DC node and the Rules Modeling node to view the ruleset.
More Information
Locating the Ruleset in the Process Composer
In the Project Explorer view, expand the process composer DC node, the Process Modeling node and the Rulesets node to view the ruleset.
Note
Make sure you are in the Process Development perspective.
To open the Process Development perspective:
In SAP NetWeaver Developer Studio, choose
Window 
Open Perspective Other 
In the dialog box that appears, choose Process Development and choose OK.
End of the note.