I pushed a change draft for Issue #287 : “Define default for resultProvenance.lastDetectionTimeUtc”. Documents/ChangeDrafts/Active/sarif-v2.0-issue-287-lastDetectionTimeUtc-default.docx In the issue’s discussion thread, Michael and I decided that it made sense to bring back the property run.startTimeUtc . Please read the thread to see how that idea is related to this issue. So we’ve restored that property, and for symmetry, also restored run.endTimeUtc . We’ll move its adoption at TC #29 on Wednesday December 12 th . Thanks, Larry