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

Use patternProperties instead of properties. In the example below, the pattern match regex .* accepts any property name and I am allowing types of string or null only by using "additionalProperties": false.

  "patternProperties": {
    "^.*$": {
      "anyOf": [
        {"type": "string"},
        {"type": "null"}
      ]
    }
  },
  "additionalProperties": false