Currently when we convert from a data.TraceData structure to go.opencensus.io/trace.Span structures to send to actual exports in exporterwrapper.go, none of the properties from Node are used. See the Node proto for the agent.

At least for the Stackdriver exporter, we should follow the practice of the other Stackdriver exporters and write the g.co/agent attribute based on the Node.LibraryInfo that has the language and version info for the library that wrote the spans to the agent. That would allow users to understand
what library produced the spans in a particular trace in case it needs to be upgraded.