semantic-conventions/work_in_progress/gRPC/gRPC.md

gRPC

Propagation

Propagation is how SpanContext is transmitted on the wire in an gRPC request.

TODO: review and close on binary protocol and metadata name

The propagation MUST inject a SpanContext as a gRPC metadata grpc-trace-bin and MUST extract a SpanContext from the gRPC metadata. Serialization format is configurable. The default serialization format should be used is W3C binary trace context.