Format "date-time" requiring

[j94305]

Create a schema:

{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "title": "Timestamp Test",
    "type": "object",
    
    "properties": {
	"@timestamp": {
	    "description": "The UTC date and time the event was created",
	    "type": "string",
	    "format": "date-time"
	}
    }
}

Create three test JSON files:

{
    "@timestamp": "2023-07-06T20:20:10.388-02:00"
}
{
    "@timestamp": "2023-07-06T20:20:10.388Z"
}
{
    "@timestamp": "2023-07-06T20:20:10.388"
}

The first two will validate against the schema, the third one does not.

The standard ISO 8601 date/time specification makes the timezone specification optional. Other JSON Schema libraries handle this correctly (e.g., "check-jsonschema").