diff --git a/version0.4/ebnf.cpp b/version0.4/ebnf.cpp
index d3f5a12..e1b8d3d 100644
--- a/version0.4/ebnf.cpp
+++ b/version0.4/ebnf.cpp
@@ -1 +1,50 @@
+//
+//definition:
+//var e=1;
+//var e=e;
+//var e=e[0];
+//var e=e[i];
+//var e=e.e;
+//var e=e[func()];
+//var e=func();
+//	identifier
+//	scalar
+//	call_func -> identifier    func_name()
+//	array_search -> identifier e[0] e[e]
+//	hash_search -> identifier  e.e
 
+<1><scalar> ::=
+	<number> //NUMBER
+	<string> //STRING
+<2><scalars> ::=
+	<scalar>|<scalars>         <,> <scalar>|<identifier>
+	<identifier>|<identifiers> <,> <scalar>
+<3><identifier> ::=
+	<identifier> // IDENTIFIER
+	<identifier> <[> <identifier>|<scalar> <]> //__array_search
+	<identifier> <.> <identifier> //__hash_search
+	<identifier> <(> <identifier>|<identifiers>|<scalar>|<scalars> <)> //__call_func
+<4><identifiers> ::=
+	<identifier>  <,> <identifier>
+	<identifiers> <,> <identifier>
+<5><definition> ::=
+	<var> <identifier> <=> <identifier> <;>
+	<var> <identifier> <=> <call_function> <;>
+	<var> <identifier> <=> <[><]> <;>
+	<var> <identifier> <=> <{><}> <;>
+	<var> <identifier> <=> <[> <scalar>|<scalars>|<identifier>|<identifiers> <]> <;>
+	<var> <identifier> <=> <{> <hash_members> <}> <;>
+<6><assignment> ::=
+	<identifier> <=> <identifier> <;>
+<7><def_func> ::=
+	<var> <identifier> <=> <func> <(><)> <{><}>
+	<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{><}>
+	<var> <identifier> <=> <func> <(><)> <{> <statements> <}>
+	<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{> <statements> <}>
+<8><statement> ::=
+	<definition>
+	<assignment>
+	<def_func>
+	<identifier> <;>
+<9><statements> ::=
+	<statement>|<statements> <statement>