+const static char* WDG_SELECTOR = "selector";
+
+//Specific widget containers
+const static char* WDG_POINT_SELECTOR = "point_selector";
+const static char* WDG_POINT2D_DISTANCE = "point2ddistance";
+
+const static char* WDG_FEATURE_SELECTOR = "feature_selector";
+const static char* WDG_DOUBLEVALUE_EDITOR = "doublevalue_editor";