Unciv/docs/Modders/schemas/uniques.json

{
    "$schema": "http://json-schema.org/draft-07/schema",
    "type": "array",
    "items": {
        "type": "string",
        "allOf": [
            {
                "type": "string",
                "description": "All <> brackets come in pairs",
                "pattern": "^[^><]*(\\<[^>]*\\>[^><]*)*$"
            },
            {
                "type": "string",
                "description": "All [] brackets come in pairs",
                "pattern": "^[^\\[\\]]*(\\[[^\\[\\]]*\\][^\\[\\]]*)*$"
            }
        ]
    }
}