-const static char* ATTRIBUTE_INTERNAL = "internal";
-const static char* ATTRIBUTE_OBLIGATORY = "obligatory";
-const static char* ATTRIBUTE_CONCEALMENT = "concealment";
-// TODO: Rename
-const static char* PREVIOUS_FEATURE_PARAM = "previous_feature_param";
-const static char* ANY_WDG_TOOLTIP = FEATURE_TOOLTIP;
-const static char* ANY_WDG_ICON = FEATURE_ICON;
-const static char* ANY_WDG_LABEL = "label";
-const static char* ANY_WDG_DEFAULT = "default";
-
-const static char* SOURCE_FILE = "path";
-const static char* VALIDATOR_PARAMETERS = "parameters";
-
-// doublevalue properties:
+// Widget (attribute) properties
+const static char* ATTR_TOOLTIP = FEATURE_TOOLTIP;
+const static char* ATTR_ICON = FEATURE_ICON;
+const static char* ATTR_LABEL = "label";
+const static char* ATTR_DEFAULT = "default";
+const static char* ATTR_INTERNAL = "internal";
+const static char* ATTR_OBLIGATORY = "obligatory";
+const static char* ATTR_CONCEALMENT = "concealment";
+// WDG_INFO properties