{
  "name": "match_exists_on_attribute",
  "description": "exists/not_exists test presence and take no value.",
  "rules": [
    {
      "match": [
        {
          "field": "attributes.trace_id",
          "op": "exists"
        }
      ],
      "actions": [
        {
          "action": "derive",
          "field": "attributes.traced",
          "value": "yes"
        }
      ]
    }
  ],
  "inputs": [
    {
      "timestamp_unix_nano": 1000,
      "host": "h1",
      "service": "s1",
      "severity": "SEVERITY_INFO",
      "message": "a",
      "attributes": {
        "trace_id": "abc"
      }
    },
    {
      "timestamp_unix_nano": 2000,
      "host": "h1",
      "service": "s1",
      "severity": "SEVERITY_INFO",
      "message": "b",
      "attributes": {}
    }
  ],
  "expect": [
    {
      "timestamp_unix_nano": 1000,
      "host": "h1",
      "service": "s1",
      "severity": "SEVERITY_INFO",
      "message": "a",
      "attributes": {
        "trace_id": "abc",
        "traced": "yes"
      }
    },
    {
      "timestamp_unix_nano": 2000,
      "host": "h1",
      "service": "s1",
      "severity": "SEVERITY_INFO",
      "message": "b",
      "attributes": {}
    }
  ]
}