Wrong OperationOutcome format

[yazver]

OperationOutcome.issue.expression has string format instead of []string.

FHIR specification:

"expression": {
    "description": "A [simple subset of FHIRPath](fhirpath.html#simple) limited to element names, repetition indicators and the default child accessor that identifies one of the elements in the resource that caused this issue to be raised.",
    "items": {
        "$ref": "#/definitions/string"
    },
    "type": "array"
}

AiDBOX info:

OperationOutcome.issue.expression | string [ ] | FHIRPath of element(s) related to issue

But the server returns:

{
    "resourceType": "OperationOutcome",
    "text": {
        "status": "generated",
        "div": "Invalid resource"
    },
    "issue": [
        {
            "severity": "fatal",
            "code": "invalid",
            "expression": "Patient.birthDate",
            "diagnostics": "expected format ^-?[0-9]{4}(-(0[1-9]|1[0-2])(-(0[0-9]|[1-2][0-9]|3[0-1]))?)?$"
        }
    ]
}

[rublag]

Fixed in the :edge channel.