Documentation for trace input handling

README.md

@@ -15,3 +15,10 @@ The *images* folder holds the images used in this document.
 ## Overall microservice architecture
 ![SMART architecture image](images/smart-architecture.png)
 
+## Trace input handling
+1. New traces are POSTed to the REST gateway
+1. The gateway fowards the new trace to the message broker
+1. The trace retrieval microservice receives the message, stores the trace in its document-based database and sends a notification to the message broker
+1. The semantic linking microservice receives the notification and GETs all traces (including the new one) from the trace retrieval microservice
+1. All traces can now be processed
+![Input handling image](images/input-handling.png)