diff --git a/interfaces/OSM/OSM.proto b/interfaces/OSM/OSM.proto
new file mode 100644
index 0000000000000000000000000000000000000000..77eebeba9cfb53fc7fde2b49ccaae00967bdddc6
--- /dev/null
+++ b/interfaces/OSM/OSM.proto
@@ -0,0 +1,60 @@
+syntax = "proto3";
+
+package ipos.models;
+
+message OSMOutputWrapper {
+  repeated OSMObject objects = 1;
+}
+
+message OSMExtInputWrapper {
+  repeated OSMMonitoringTarget monitoringTargets = 1;
+}
+
+message OSMMonitoringTarget {
+  string monitorintTaskId = 1;
+  string protocol = 2;
+}
+
+message OSMObject {
+  string id = 1;
+  string sensorId = 2;
+  string type = 3;
+  string sensorType = 4;
+  OSMPosition position = 5;
+  OSMOrientation orientation = 6;
+  string lastPosUpdate = 7; // https://en.wikipedia.org/wiki/ISO_8601
+  repeated OSMZoneDescriptor zoneDescriptors = 8; // contains information about all zones that the current position of this object belongs to
+  OSMExtractedAttributes extractedAttributes = 9;
+}
+
+message OSMPosition{
+  string refSystemId = 1; // e.g., "WGS84" if absolute position, "ROOT" for testcases or if specific absolute position is actually irrelevant
+  OSMPoint point = 2;
+  float accuracy = 3; // object is with 95% probability within x metres of this point (gaussian distribution)
+
+}
+
+message OSMPoint{
+  float x = 1; // pos in x direction in m
+  float y = 2; // pos in y direction in m
+  float z = 3; // pos in z direction in m (up)
+}
+
+message OSMOrientation{
+  float x = 1; // quaternion notation
+  float y = 2; // if the quaternion is (0,0,0,0)
+  float z = 3; // there is no orientation
+  float w = 4; // available
+}
+
+message OSMExtractedAttributes{
+  float batteryChargeLevel = 1;
+  repeated int32 loadedItems = 2;
+  repeated int32 errors = 3;
+  float theta = 4;
+}
+
+message OSMZoneDescriptor{
+  string zoneId = 1;
+  string notificationType = 2; // may be ExitNotification or EntryNotification
+}
\ No newline at end of file
diff --git a/interfaces/OSM/README.md b/interfaces/OSM/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..7ceea58a9a857b9f2411865f431206f2c2e78e6b
--- /dev/null
+++ b/interfaces/OSM/README.md
@@ -0,0 +1,3 @@
+# OSM Protobuf Definition
+
+This protobuf data model is a description of the messages sent to the OpenStreetMap-application ("frontend").
\ No newline at end of file
diff --git a/interfaces/SimpleScene/SimpleScene.proto b/interfaces/SimpleScene/SimpleScene.proto
index 6fdbc6e5a1f2bfc95a13ffdbb1b89a3e2bbe60af..e2ed5a6e27731faa6892416256b93de57b3ebfd5 100644
--- a/interfaces/SimpleScene/SimpleScene.proto
+++ b/interfaces/SimpleScene/SimpleScene.proto
@@ -14,7 +14,7 @@ message IposConfigWrapper { // wrapper-message for configuration-topic
 
 message IposMonitoringWrapper {
   repeated IposPositionEvent iposPositionEvents = 1;
-  repeated IposMsgRcvEvent iposMsgRcvEvent = 2;
+  repeated IposMsgRcvEvent iposMsgRcvEvents = 2;
 }
 
 message IposObjectConfig {