{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "properties": {
    "keywords": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[0-9a-zA-Z_-]{1,255}$"
      },
      "maxItems": 100
    }
  },
  "additionalProperties": false
}