{
  "$schema": "http://json-schema.org/draft-03/schema",
  "type": "object",
  "description": "A collection of product Presentations",
  "properties": {
    "size": {
      "type": "integer",
      "required": true
    },
    "presentations": {
      "type": "array",
      "items": {"$ref": "presentation.json"}
    }
  }
}