The trace context associated with this span. This should be reused on related events to link them to the same trace.
The name of the operation being traced (e.g., db.query, http.request).
OptionalserviceThe name of the service where the operation is taking place (e.g., user-service, payment-service).
OptionalenvThe name of the environment where the service is running (e.g., dev, prod).
OptionalregionThe name of the region where the service is located (e.g., us-east-1, eu-west-1).
The start time of the span in milliseconds since the epoch.
OptionalattrsA record of attributes captured at the start of the span.
A lightweight token representing an in-flight span. This token is returned from Tracer.spanStart and should be passed to Tracer.spanEnd to complete the span. It contains the trace context and other metadata associated with the span.