{
   "openapi": "3.0.0",
   "info": {},
   "components": {
      "schemas": {
         "MyType": {
            "type": "object",
            "required": [
               "myString",
               "myPattern",
               "myAntiPattern"
            ],
            "properties": {
               "myString": {
                  "type": "string",
                  "minLength": 1,
                  "maxLength": 5
               },
               "myPattern": {
                  "type": "string",
                  "pattern": "foo.*bar"
               },
               "myAntiPattern": {
                  "type": "string",
                  "not": {
                     "type": "string",
                     "pattern": "foo.*bar"
                  }
               }
            }
         }
      }
   }
}