diff --git a/uppsrc/Core/JSON.h b/uppsrc/Core/JSON.h
index 0640e0c07..ea2cddc6f 100644
--- a/uppsrc/Core/JSON.h
+++ b/uppsrc/Core/JSON.h
@@ -457,3 +457,20 @@ void JsonizeBySerialize(JsonIO& jio, T& x)
 			throw JsonizeError("jsonize by serialize error");
 		}
 }
+
+template <class IZE>
+struct LambdaIzeVar {
+	IZE& ize;
+
+	void Jsonize(JsonIO& io) { ize(io); }
+	void Xmlize(XmlIO& io) { ize(io); }
+	
+	LambdaIzeVar(IZE& ize) : ize(ize) {}
+};
+
+template <class IO, class IZE>
+void LambdaIze(IO& io, const char *id, IZE ize)
+{
+	LambdaIzeVar<IZE> var(ize);
+	io(id, var);
+}
diff --git a/uppsrc/Core/src.tpp/Jsonize_en-us.tpp b/uppsrc/Core/src.tpp/Jsonize_en-us.tpp
index 2781e1ee1..4cef4e745 100644
--- a/uppsrc/Core/src.tpp/Jsonize_en-us.tpp
+++ b/uppsrc/Core/src.tpp/Jsonize_en-us.tpp
@@ -216,4 +216,13 @@ _[@(0.0.255) void]_[* JsonizeBySerialize]([_^JsonIO^ JsonIO][@(0.0.255) `&]_[*@3
 [*@4 T][@(0.0.255) `&]_[*@3 x])&]
 [s2;%% This function encodes/retrieves Json by binary serializing 
 the object and Jsonizing the hexadecimal data string.&]
+[s3;%% &]
+[s4; &]
+[s5;:Upp`:`:LambdaIze`(IO`&`,const char`*`,IZE`): [@(0.0.255) template]_<[@(0.0.255) clas
+s]_[*@4 IO], [@(0.0.255) class]_[*@4 IZE]>_[@(0.0.255) void]_[* LambdaIze]([*@4 IO][@(0.0.255) `&
+]_[*@3 io], [@(0.0.255) const]_[@(0.0.255) char]_`*[*@3 id], [*@4 IZE]_[*@3 ize])&]
+[s2;%% This special function uses [%-*@3 ize] to represent the value 
+of Jsonize or Xmlize node named [%-*@3 id]. Lambda should have 
+one paramter IO`&.&]
+[s3;%% &]
 [s3;%% ]]
\ No newline at end of file