Spans.
A Span is the workhorse of traces, it indicates an operation that took place over a given span of time (indicated by start_time and end_time) as part of a hierarchical trace. All spans in a given trace are bound by the use of the same Trace_id.t.
type t = Proto.Trace.spantype id = Span_id.ttype nonrec kind = Proto.Trace.span_span_kind = type nonrec status_code = Proto.Trace.status_status_code = val create :
?kind:kind ->
?id:id ->
?trace_state:string ->
?attrs:key_value list ->
?events:Event.t list ->
?status:status ->
trace_id:Trace_id.t ->
?parent:id ->
?links:(Trace_id.t * Span_id.t * string) list ->
start_time:Timestamp_ns.t ->
end_time:Timestamp_ns.t ->
string ->
t * idcreate ~trace_id name creates a new span with its unique ID.