| Attribute | Type | Description | Examples | Stability |
|---|---|---|---|---|
opentracing.ref_type |
string | Parent-child Reference type [1] | child_of |
 |
[1]: The causal relationship between a child Span and a parent Span.
opentracing.ref_type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
|---|---|---|
child_of |
The parent Span depends on the child Span in some capacity | |
follows_from |
The parent Span doesn't depend in any way on the result of the child Span | |