JSON Schema with unknown property names

Question

I want to have a JSON Schema with unknown property names in an array of objects. A good example is the meta-data of a web page:

      \"meta\": {
        \"typ         


        

Answer 1

You can make constraints on properties not explicitly defined. The following schema enforces "meta" to be an array of objects whose properties are of type string:

{
    "properties" : {
        "meta" : {
            "type" : "array",
            "items" : {
                "type" : "object",
                "additionalProperties" : {
                    "type" : "string"
                }
            }
        }
    }
}

In case you just want to have an array of strings, you may use the following schema:

{
    "properties" : {
        "meta" : {
            "type" : "array",
            "items" : {
                "type" : "string"
            }
        }
    }
}