diff --git a/src/main/kotlin/infrastructure/digitaltwins/events/TwinProperties.kt b/src/main/kotlin/infrastructure/digitaltwins/events/TwinProperties.kt
new file mode 100644
index 0000000..58e0d72
--- /dev/null
+++ b/src/main/kotlin/infrastructure/digitaltwins/events/TwinProperties.kt
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2023. Smart Operating Block
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+package infrastructure.digitaltwins.events
+
+/**
+ * Object with all the properties path of Digital Twins.
+ */
+object TwinProperties {
+
+    /**
+     * The properties path of Room Model.
+     * @param path the property path.
+     */
+    enum class RoomProperties(val path: String) {
+        TEMPERATURE("/temperature"),
+        HUMIDITY("/humidity"),
+        LUMINOSITY("/luminosity"),
+        PRESENCE("/presence_inside")
+    }
+
+    /**
+     * The properties path of Patient Model.
+     * @param path the property path.
+     */
+    enum class PatientProperties(val path: String) {
+        BODY_TEMPERATURE("/body_temperature"),
+        DIASTOLIC_PRESSURE("/diastolic_blood_pressure"),
+        SYSTOLIC_PRESSURE("/systolic_blood_pressure"),
+        IS_ON_OPERATING_TABLE("/is_on_operating_table"),
+        RESPIRATORY_RATE("/respiratory_rate"),
+        SATURATION_PERCENTAGE("/saturation_percentage"),
+        HEARTBEAT("/heart_beat")
+    }
+
+    /**
+     * The digital twins model id.
+     * @param id the model id.
+     */
+    enum class DTModelID(val id: String) {
+        OPERATING_ROOM_MODEL_ID("dtmi:io:github:smartoperatingblock:OperatingRoom;1"),
+        PRE_OPERATING_ROOM_MODEL_ID("dtmi:io:github:smartoperatingblock:PrePostOperatingRoom;1"),
+        PROCESS_MODEL_ID("dtmi:io:github:smartoperatingblock:SurgicalProcess;1"),
+        PATIENT_MODEL_ID("dtmi:io:github:smartoperatingblock:Patient;1"),
+        HEALTH_PROFESSIONAL_MODEL_ID("dtmi:io:github:smartoperatingblock:HealthProfessional;1")
+    }
+
+    /**
+     * The types of digital twin events.
+     * @param type the event type.
+     */
+    enum class DTEventTypes(val type: String) {
+        UPDATE("Microsoft.DigitalTwins.Twin.Update"),
+        RELATIONSHIP_CREATE("Microsoft.DigitalTwins.Relationship.Create"),
+        RELATIONSHIP_DELETE("Microsoft.DigitalTwins.Relationship.Delete"),
+    }
+}