{
  "$schema": "https://json-structure.org/schema/v0",
  "name": "Annotation",
  "type": "object",
  "description": "A latency-explaining event with a timestamp.",
  "properties": {
    "timestamp": {"type": "integer", "description": "Epoch microseconds of this event"},
    "value": {"type": "string", "description": "Event value"}
  },
  "required": ["timestamp", "value"]
}