`detector_id` | A unique ID for identifying a detector.
`schema_version` | The mapping version of the result index.
`data_start_time` | The start of the detection range of the aggregated data.
`data_end_time` | The end of the detection range of the aggregated data.
`feature_data` | An array of the aggregated data points between the `data_start_time` and `data_end_time`.
`execution_start_time` | The actual start time of the detector for a specific run that produces the anomaly result. This start time includes the window delay parameter that you can set to delay data collection. Window delay is the difference between the `execution_start_time` and `data_start_time`.
`execution_end_time` | The actual end time of the detector for a specific run that produces the anomaly result.
`anomaly_score` | Indicates relative severity of an anomaly. The higher the score, the more anomalous a data point is.
`anomaly_grade` | A normalized version of the `anomaly_score` on a scale between 0 and 1.
`confidence` | The probability of the accuracy of the `anomaly_score`. The closer this number is to 1, the higher the accuracy. During the probation period of a running detector, the confidence is low (<0.9)becauseofitsexposuretolimiteddata.
`entity` | An entity is a combination of specific category fields’ values. It includes the name and value of the category field. In the previous example, `process_name` is the category field and one of the processes such as `process_3` is the field's value. The `entity` field is only present for a high-cardinality detector (where you've selected a category field).
`model_id` | A unique ID that identifies a model. If a detector is a single-stream detector (with no category field), it has only one model. If a detector is a high-cardinality detector (with one or more category fields), it might have multiple models, one for each entity.
`threshold` | One of the criteria for a detector to classify a data point as an anomaly is that its `anomaly_score` must surpass a dynamic threshold. This field records the current threshold.
If an anomaly detector detects an anomaly, the result has the following format:
```json
{
"detector_id": "fylE53wBc9MCt6q12tKp",
"schema_version": 0,
"data_start_time": 1635927900000,
"data_end_time": 1635927960000,
"feature_data": [
{
"feature_id": "processing_bytes_max",
"feature_name": "processing bytes max",
"data": 2291
},
{
"feature_id": "processing_bytes_avg",
"feature_name": "processing bytes avg",
"data": 1677.3333333333333
},
{
"feature_id": "processing_bytes_min",
"feature_name": "processing bytes min",
"data": 1054
},
{
"feature_id": "processing_bytes_sum",
"feature_name": "processing bytes sum",
"data": 5032
},
{
"feature_id": "processing_time_max",
"feature_name": "processing time max",
"data": 11422
}
],
"anomaly_score": 1.1986675882872033,
"anomaly_grade": 0.26806225550178464,
"confidence": 0.9607519742565531,
"entity": [
{
"name": "process_name",
"value": "process_3"
}
],
"approx_anomaly_start_time": 1635927900000,
"relevant_attribution": [
{
"feature_id": "processing_bytes_max",
"data": 0.03628638020431366
},
{
"feature_id": "processing_bytes_avg",
"data": 0.03384479053991436
},
{
"feature_id": "processing_bytes_min",
"data": 0.058812549572819096
},
{
"feature_id": "processing_bytes_sum",
"data": 0.10154576265526988
},
{
"feature_id": "processing_time_max",
"data": 0.7695105170276828
}
],
"expected_values": [
{
"likelihood": 1,
"value_list": [
{
"feature_id": "processing_bytes_max",
"data": 2291
},
{
"feature_id": "processing_bytes_avg",
"data": 1677.3333333333333
},
{
"feature_id": "processing_bytes_min",
"data": 1054
},
{
"feature_id": "processing_bytes_sum",
"data": 6062
},
{
"feature_id": "processing_time_max",
"data": 23379
}
]
}
],
"threshold": 1.0993584705913992,
"execution_end_time": 1635898427895,
"execution_start_time": 1635898427803
}
```
You can see the following additional fields:
Field | Description
:--- | :---
`relevant_attribution` | Represents the contribution of each input variable. The sum of the attributions is normalized to 1.
`expected_values` | The expected value for each feature.
At times, the detector might detect an anomaly late.
Let's say the detector sees a random mix of the triples {1, 2, 3} and {2, 4, 5} that correspond to `slow weeks` and `busy weeks`, respectively. For example 1, 2, 3, 1, 2, 3, 2, 4, 5, 1, 2, 3, 2, 4, 5, ... and so on.
If the detector comes across a pattern {2, 2, X} and it's yet to see X, the detector infers that the pattern is anomalous, but it can't determine at this point which of the 2's is the cause. If X = 3, then the detector knows it's the first 2 in that unfinished triple, and if X = 5, then it's the second 2. If it's the first 2, then the detector detects the anomaly late.
If a detector detects an anomaly late, the result has the following additional fields:
Field | Description
:--- | :---
`past_values` | The actual input that triggered an anomaly. If `past_values` is null, the attributions or expected values are from the current input. If `past_values` is not null, the attributions or expected values are from a past input (for example, the previous two steps of the data [1,2,3]).
`approx_anomaly_start_time` | The approximate time of the actual input that triggers an anomaly. This field helps you understand when a detector flags an anomaly. If the data is not continuous, the actual time that the detector detects the anomaly can be earlier. Both single-stream and high-cardinality detectors don't query previous anomaly results because these queries are expensive operations, especially when a detector has a lot of entities. This is why the accuracy of this field is low.
