How do i check incoming OPC UA data

Hi, in the last days I started to work with aws SiteWise. First, I deployed a gateway with 4 OPC UA sources. But now i have the problem, that my assets do not find their values. My Question is now, how I can check my incoming data from the gateway, to find out the alias for the measurement. When i look at: AWS IoT SiteWise >Data streams, i see nothing. Another problem is: At aws the browse path is separated by a forward slash. But the structure for my NoteId look like that: ns=4;s=|var|WAGO 750-8207 PFC200 CS 2ETH RS 3G.Hochregllager.GVL_H.MANUELL Here a Screenshot from the Server-Tree Server-Tree Did anyone know what the different between dot and forward slash mean ? Some additional information

Sorry for the easy question, but I am truly a beginner in aws...