Const ExperimentalThis metric should be reported for each vcs.revision_delta.direction value. For example if branch a is 3 commits behind and 2 commits ahead of trunk,
instrumentation SHOULD report two measurements: 3 and 2 (both positive numbers) and vcs.ref.base.name is set to trunk.
This metric is experimental and is subject to breaking changes in minor releases of @opentelemetry/semantic-conventions.
The number of revisions (commits) a ref (branch) is ahead/behind the branch from the
vcs.ref.base.nameattribute.