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diff --git a/eyeware-beam-sdk/API/cpp/include/eyeware/tracking_info.h b/eyeware-beam-sdk/API/cpp/include/eyeware/tracking_info.h
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+/**
+ * Copyright and confidentiality notice
+ *
+ * This file is part of GazeSense SDK, which is proprietary and confidential
+ * information of Eyeware Tech SA.
+ *
+ * Copyright (C) 2020 Eyeware Tech SA
+ *
+ * All rights reserved
+ */
+
+#ifndef CPP_API_TRACKING_INFO_H_
+#define CPP_API_TRACKING_INFO_H_
+
+#include "defines.h"
+#include "geometry.h"
+#include "types.h"
+#include <vector>
+
+namespace eyeware {
+
+/**
+ * Realibility measure for obtained tracking results.
+ */
+enum class TrackingConfidence { UNRELIABLE = 0, LOW = 1, MEDIUM = 2, HIGH = 3 };
+
+/**
+ * Represents information of a person gaze intersection with a single screen, for a given time
+ * instant. Screen gaze coordinates are expressed in pixels with respect to the top-left corner of
+ * the screen.
+ * \cond
+ * For more information on the screen coordinate system, see @ref EwScreenConfig.
+ * \endcond
+ */
+struct ScreenGazeInfo {
+    /**
+     * ID of the screen, to differentiate in case of a multiscreen setup.
+     */
+    uint32_t screen_id = 0;
+
+    /**
+     * The horizontal screen coordinate for the gaze intersection.
+     */
+    uint32_t x = 0;
+
+    /**
+     * The vertical screen coordinate for the gaze intersection.
+     */
+    uint32_t y = 0;
+
+    /**
+     * The confidence of the tracking result.
+     */
+    TrackingConfidence confidence = TrackingConfidence::UNRELIABLE;
+
+    /**
+     * Tracking status that tells if the other values are dependable.
+     */
+    bool is_lost = true;
+};
+
+/**
+ * Represents information about gaze tracking within single frame corresponding to a particular
+ * person.
+ *
+ * Note: left and right refer to the eyes from the point of view of the camera. This means that
+ *       they are inverted compared to the anatomical left and right of the point of view of the
+ *       person.
+ */
+struct GazeInfo {
+    /**
+     * Represents the left eye gaze ray, expressed in the World Coordinate System.
+     */
+    Ray3D left_eye_ray;
+
+    /**
+     * Represents the right eye gaze ray, expressed in the World Coordinate System.
+     */
+    Ray3D right_eye_ray;
+
+    /**
+     * Confidence of the left eye gaze ray prediction.
+     */
+    TrackingConfidence confidence_left = TrackingConfidence::UNRELIABLE;
+
+    /**
+     * Confidence of the right eye gaze ray prediction.
+     */
+    TrackingConfidence confidence_right = TrackingConfidence::UNRELIABLE;
+
+    /**
+     * Tracking status that tells if the other values are dependable
+     */
+    bool is_lost = true;
+};
+
+/**
+ * Represents information about eyes blinks within a single frame corresponding to a particular
+ * person.
+ *
+ * Note: left and right refer to the eyes from the point of view of the camera. This means that
+ *       they are inverted compared to the anatomical left and right of the point of view of the
+ *       person.
+ */
+struct BlinkInfo {
+    /**
+     * Represents the left eye closure.
+     */
+    bool left_eye_closed;
+
+    /**
+     * Represents the right eye closure.
+     */
+    bool right_eye_closed;
+
+    /**
+     * Confidence of the left eye closure prediction.
+     */
+    TrackingConfidence confidence_left = TrackingConfidence::UNRELIABLE;
+
+    /**
+     * Confidence of the right eye closure prediction.
+     */
+    TrackingConfidence confidence_right = TrackingConfidence::UNRELIABLE;
+
+    /**
+     * Whether person's blinks were tracked, meaning the values in this data structure are valid.
+     */
+    bool is_lost = true;
+};
+
+/**
+ * Represents information of the head pose, for a given time instant.
+ */
+struct HeadPoseInfo {
+    /**
+     * Head pose, defined at the nose tip, with respect to the World Coordinate System (WCS).
+     */
+    AffineTransform3D transform;
+    /**
+     * Indicates if tracking of the head is lost, i.e., if false, the user is not being tracked.
+     */
+    bool is_lost = true;
+    /**
+     * Indicates the ID of the session of uninterrupted consecutive tracking.
+     */
+    uint64_t track_session_uid = 0;
+};
+
+struct TrackedPersonInfo {
+    HeadPoseInfo head_pose;
+    GazeInfo gaze;
+    ScreenGazeInfo screen_gaze;
+    BlinkInfo blink;
+};
+
+struct TrackedUser {
+    TrackedUser(uint32_t id) : id{id} {}
+    TrackedUser operator=(const TrackedUser &other) { return TrackedUser{other.id}; }
+    const uint32_t id = 0;
+    TrackedPersonInfo tracking_info;
+};
+
+struct TrackingEvent {
+    std::vector<TrackedUser> people;
+    Timestamp timestamp = 0.0;
+};
+
+} // namespace eyeware
+
+#endif