Grouping Navigation Rules

• Suppose multiple pages navigate to the same page.

• For example, Logout buttons appear on multiple pages.

• These rules (suppose there are n of them):

       <navigation-rule>
          <from-view-id>/page1.jsp</from-view-id>
          <navigation-case>
             <from-outcome>logout</from-outcome>
             <to-view-id>/logout.jsp</to-view-id>
          </navigation-case>
       </navigation-rule>
  
       <navigation-rule>
          <from-view-id>/page2.jsp</from-view-id>
          <navigation-case>
             <from-outcome>logout</from-outcome>
             <to-view-id>/logout.jsp</to-view-id>
          </navigation-case>
       </navigation-rule>
       ...

  can be replaced by:

       <navigation-rule>
          <navigation-case>
             <from-outcome>logout</from-outcome>
             <to-view-id>/logout.jsp</to-view-id>
          </navigation-case>
       </navigation-rule>

• Can achieve same effect with wildcards (though they complicate the navigation algorithm)