diff --git a/inference-engine/include/ie_core.hpp b/inference-engine/include/ie_core.hpp
index 3ab66ff7f58d55..fdb60d758277e7 100644
--- a/inference-engine/include/ie_core.hpp
+++ b/inference-engine/include/ie_core.hpp
@@ -73,10 +73,13 @@ class INFERENCE_ENGINE_API_CLASS(Core) {
 
 #ifdef ENABLE_UNICODE_PATH_SUPPORT
     /**
-     * @brief Reads IR xml and bin files
-     * @param modelPath path to IR file
-     * @param binPath path to bin file, if path is empty, will try to read bin file with the same name as xml and
-     * if bin file with the same name was not found, will load IR without weights.
+     * @brief Reads models from IR and ONNX formats
+     * @param modelPath path to model
+     * @param binPath path to data file
+     * For IR format (*.bin):
+     *  * if path is empty, will try to read bin file with the same name as xml and
+     *  * if bin file with the same name was not found, will load IR without weights.
+     * ONNX models with data files are not supported
      * @return CNNNetwork
      */
     CNNNetwork ReadNetwork(const std::wstring& modelPath, const std::wstring& binPath = {}) const {
@@ -85,17 +88,22 @@ class INFERENCE_ENGINE_API_CLASS(Core) {
 #endif
 
     /**
-     * @brief Reads IR xml and bin files
-     * @param modelPath path to IR file
-     * @param binPath path to bin file, if path is empty, will try to read bin file with the same name as xml and
-     * if bin file with the same name was not found, will load IR without weights.
+     * @brief Reads models from IR and ONNX formats
+     * @param modelPath path to model
+     * @param binPath path to data file
+     * For IR format (*.bin):
+     *  * if path is empty, will try to read bin file with the same name as xml and
+     *  * if bin file with the same name was not found, will load IR without weights.
+     * ONNX models with data files are not supported
      * @return CNNNetwork
      */
     CNNNetwork ReadNetwork(const std::string& modelPath, const std::string& binPath = {}) const;
     /**
-     * @brief Reads IR xml and bin (with the same name) files
-     * @param model string with IR
+     * @brief Reads models from IR and ONNX formats
+     * @param model string with model in IR or ONNX format
      * @param weights shared pointer to constant blob with weights
+     * ONNX models doesn't support models with data blobs.
+     * For ONNX case the second parameter should contain empty blob.
      * @return CNNNetwork
      */
     CNNNetwork ReadNetwork(const std::string& model, const Blob::CPtr& weights) const;