The context of a span. This is attached to an
Exemplar][google.api.Distribution.Exemplar] in
Distribution][google.api.Distribution] values during aggregation.
str
The resource name of the span. The format is:
::
projects/[PROJECT_ID_OR_NUMBER]/traces/[TRACE_ID]/spans/[SPAN_ID]
[TRACE_ID] is a unique identifier for a trace within a
project; it is a 32-character hexadecimal encoding of a
16-byte array.
[SPAN_ID] is a unique identifier for a span within a
trace; it is a 16-character hexadecimal encoding of an
8-byte array.