diff --git a/PolyEngine/Core/Src/pe/core/io/IProtocolSAX.hpp b/PolyEngine/Core/Src/pe/core/io/IProtocolSAX.hpp
new file mode 100644
index 00000000..2450ef5b
--- /dev/null
+++ b/PolyEngine/Core/Src/pe/core/io/IProtocolSAX.hpp
@@ -0,0 +1,58 @@
+#include <Defines.hpp>
+#include <core/utils/Result.hpp>
+#include <core/storage/String.hpp>
+
+namespace pe::core::io {
+
+enum class ErrorSAX {
+    INTERNAL,
+    _COUNT
+};
+
+using ResultSAX = utils::Result<void, ErrorSAX>;
+
+class IProtocolSAX : public BaseObject<>
+{
+    virtual ResultSAX key(std::string_view name) = 0;
+    virtual ResultSAX metakey(std::string_view name) = 0;
+
+    virtual ResultSAX null() = 0;
+
+    virtual ResultSAX boolean(bool value) = 0;
+
+    virtual ResultSAX number(int32_t value) = 0;
+    virtual ResultSAX number(uint32_t value) = 0;
+    virtual ResultSAX number(int64_t value) = 0;
+    virtual ResultSAX number(uint64_t value) = 0;
+    virtual ResultSAX number(float value) = 0;
+    virtual ResultSAX number(double value) = 0;
+
+    virtual ResultSAX text(std::string_view text) = 0;
+    virtual ResultSAX text(storage::String&& text) = 0;
+
+    virtual ResultSAX binaryStream(const uint8_t* bytes, size_t size) = 0;
+
+    virtual ResultSAX startObject() = 0;
+    virtual ResultSAX endObject() = 0;
+
+    virtual ResultSAX startArray() = 0;
+    virtual ResultSAX endArray() = 0;
+};
+
+class IEventHandlerSAX : IProtocolSAX
+{
+    virtual uint8_t* binaryStreamBufferRequest(size_t size) { return nullptr; }
+    virtual void binaryStreamBufferFilled(const ResultSAX& status) {}
+};
+
+class IReaderSAX
+{
+    virtual ResultSAX read(IEventHandlerSAX& handler);
+};
+
+class IWriterSAX : IProtocolSAX
+{
+    virtual ResultSAX write();
+};
+
+} // namespace pe::core::io
\ No newline at end of file
diff --git a/PolyEngine/Engine/Src/pe/engine/EnginePCH.hpp b/PolyEngine/Engine/Src/pe/engine/EnginePCH.hpp
index 9e3e1fcb..d8cec4bc 100644
--- a/PolyEngine/Engine/Src/pe/engine/EnginePCH.hpp
+++ b/PolyEngine/Engine/Src/pe/engine/EnginePCH.hpp
@@ -43,6 +43,8 @@
 #include <pe/core/storage/Queue.hpp>
 #include <pe/core/storage/PriorityQueue.hpp>
 
+// IO
+#include <pe/core/io/IProtocolSAX.hpp>
 
 // Other
 #include <pe/core/math/Color.hpp>
@@ -50,7 +52,8 @@
 #include <pe/core/utils/Logger.hpp>
 #include <pe/core/UniqueID.hpp>
 #include <pe/core/utils/EnumUtils.hpp>
-#include <pe/core/utils/OutputStream.hpp> 
+#include <pe/core/utils/OutputStream.hpp>
+#include <pe/core/utils/Result.hpp> 
 
 // OpenAL
 #include <AL/al.h>