grouping_stmt : GROUPING_KEYWORD string (SEMICOLON | (LEFT_BRACE (identifier_stmt |status_stmt | description_stmt | reference_stmt | typedef_stmt | grouping_stmt | data_def_stmt )* RIGHT_BRACE));
value_stmt : VALUE_KEYWORD string stmtend;
max_value_arg : /*UNBOUNDED_KEYWORD |*/ string;
+min_value_arg : /*UNBOUNDED_KEYWORD |*/ string;
max_elements_stmt : MAX_ELEMENTS_KEYWORD max_value_arg stmtend;
-min_elements_stmt : MIN_ELEMENTS_KEYWORD string stmtend;
+min_elements_stmt : MIN_ELEMENTS_KEYWORD min_value_arg stmtend;
error_app_tag_stmt : ERROR_APP_TAG_KEYWORD string stmtend;
error_message_stmt : ERROR_MESSAGE_KEYWORD string stmtend;
must_stmt : MUST_KEYWORD string (SEMICOLON | (LEFT_BRACE (identifier_stmt |error_message_stmt | error_app_tag_stmt | description_stmt | reference_stmt )* RIGHT_BRACE));
path_stmt : PATH_KEYWORD string stmtend;
leafref_specification : path_stmt;
enum_stmt : ENUM_KEYWORD string (SEMICOLON | (LEFT_BRACE (identifier_stmt |value_stmt | status_stmt | description_stmt | reference_stmt )* RIGHT_BRACE));
-enum_specification : enum_stmt (identifier_stmt | enum_stmt )+;
+enum_specification : enum_stmt (identifier_stmt | enum_stmt )*;
default_stmt : DEFAULT_KEYWORD string stmtend;
pattern_stmt : PATTERN_KEYWORD string (SEMICOLON | (LEFT_BRACE (identifier_stmt |error_message_stmt | error_app_tag_stmt | description_stmt | reference_stmt )* RIGHT_BRACE));
length_stmt : LENGTH_KEYWORD string (SEMICOLON | (LEFT_BRACE (identifier_stmt |error_message_stmt | error_app_tag_stmt | description_stmt | reference_stmt )* RIGHT_BRACE));