+StartShowLocalNavBlock: Showing the local nav menu
+- $action: the current action
+
+EndShowLocalNavBlock: At the end of the local nav menu
+- $action: the current action
+
+StartShowHTML: Chance to set document headers (e.g., content type, charset, language), DOCTYPE and html element properties
+- $action: the current action
+
+EndShowHTML: Showing after the html element
+- $action: the current action
+
+StartPublicGroupNav: Showing the public group nav menu
+- $action: the current action
+
+EndPublicGroupNav: At the end of the public group nav menu
+- $action: the current action
+
+RouterInitialized: After the router instance has been initialized
+- $m: the Net_URL_Mapper that has just been set up
+