# Schema

## Response Content Type

All responses will be provided in `application/json` unless stated otherwise in the endpoint description.

When other formats are available, a `format` parameter will be provided with a list of supported formats.

## Date and Duration

All date and duration fields will be formatted using ISO 8601 format. All timestamps will use the UTC time zone.

Date format `YYYY-MM-DD` example:

```
2010-10-21
```

Date and time format `YYYY-MM-DDTHH:MM:SS.SSSZ` example:

```
2023-01-25T16:20:20.000Z
```

Duration format `PnYnMnDTnHnMnS` example:

```
PT30M5S
```

## Empty Values

Empty fields will be omitted from responses except in the case of a nested object, then a `null` value will be provided.

### Example:

```json
{
  "sessionId": "",
  "startDate": "2023-01-25T16:20:20.000Z",
  "endDate": "2023-01-25T16:20:20.000Z",
  "result": {
    "level": "E3 - Lower"
  }
}
```

In the example above, `endDate` and `result` can be empty. The example below shows the response when those fields are empty.

```json
{
  "sessionId": "",
  "startDate": "2023-01-25T16:20:20.000Z",
  "result": null
}
```