diff --git a/interfaces/OSM/OSM.proto b/interfaces/OSM/OSM.proto
index 77eebeba9cfb53fc7fde2b49ccaae00967bdddc6..10a565f849cf6004edb0b3e20579b29f3e128671 100644
--- a/interfaces/OSM/OSM.proto
+++ b/interfaces/OSM/OSM.proto
@@ -4,6 +4,7 @@ package ipos.models;
 
 message OSMOutputWrapper {
   repeated OSMObject objects = 1;
+  repeated OSMWaypoint waypoints = 2;
 }
 
 message OSMExtInputWrapper {
@@ -57,4 +58,12 @@ message OSMExtractedAttributes{
 message OSMZoneDescriptor{
   string zoneId = 1;
   string notificationType = 2; // may be ExitNotification or EntryNotification
+}
+
+message OSMWaypoint{
+  string agentId = 1;
+  string agentType = 2;
+  string publisher = 3;
+  OSMPosition position = 4;
+  string time = 5;
 }
\ No newline at end of file
diff --git a/interfaces/SimpleScene/SimpleScene.proto b/interfaces/SimpleScene/SimpleScene.proto
index e2ed5a6e27731faa6892416256b93de57b3ebfd5..26eeb206f763b9ab47a9a8526f346aaceec98065 100644
--- a/interfaces/SimpleScene/SimpleScene.proto
+++ b/interfaces/SimpleScene/SimpleScene.proto
@@ -76,7 +76,6 @@ message RefSystem {
 }
 
 message IposMonitoringRequest {
-  // frameId = 1; // deprecated
   repeated string frameIds = 1; // a monitoring request can be concerned with multiple overlapping frames
   float delta = 2; // min. change in position to trigger a position update, setting delta and updateFrequency to -1 cancels the (existing) monitoring task
   float updateFrequency = 3; // defines how many times per second a PositionUpdateEvent is sent
@@ -86,7 +85,7 @@ message IposMonitoringRequest {
   bool exit_notification = 7; // IPos will notify receiver when object has left the frame
   repeated string properties = 8; // properties that shall be monitored: position or id or type or distance
   string monitoringTaskId = 9; // unique for each monitoringRequest. IPosFW uses this info for configuring the communication protocol, e.g., for selecting a specific topic for MQTT-communication; a monitoringRequest with the same monitoringTaskId like a previous request updates this request
-  string refSystemId = 10;
+  string refSystemId = 10; // id of the reference system according to which positions are to be provided
   string requestorProtocol = 11; // communication protocol, e.g., "mqtt"; Assumption: requestor = receiver
   string serializationType = 12; // accepted values: "protobuf" or "json"
 }