Generic item for headless CMS

CmsEntry.json

{
  "id": "http://socialsweethearts.de/CmsEntry#",
  "$schema": "http://json-schema.org/draft-04/schema#",
  "description": "schema for an headless_cms_mvp entry",
  "type": "object",
  "properties": {
    "value": {
      "type": "object",
      "oneOf": [{
          "$ref": "#/definitions/ListicleItems",
          "$ref": "#/definitions/Quiz",
          "$ref": "#/definitions/AdventCalendarItem"
        }
      ]
    },
    "source": {
      "enum": [
        "youtube_video",
        "twitter_post",
        "facebook_post"
      ]
    },
    "title": {
      "type": "string",
      "maxLength": 255
    },
    "slug": {
      "type": "string"
    },
    "description": {
      "type": "string"
    },
    "addition": {
      "type": "string"
    },
    "required": [
      "title",
      "slug",
      "description",
      "value"
    ]
  },
  "additionalProperties": false,
  "definitions": {
    "ListicleItems": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/ListicleItem"
      },
      "minItems": 3
    },
    "ListicleItem": {
      "type": "object",
      "required": [
        "title"
      ],
      "additionalProperties": false,
      "properties": {
        "title": {
          "type": "string",
          "maxLength": 255
        },
        "subtitle": {
          "type": "string",
          "maxLength": 255
        },
        "images": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/ImageItem"
          },
          "minItems": 1
        },
        "paragraphs": {
          "type": "array",
          "items": [{
            "type": "string"
          }]
        },
        "embeds": {
          "type": "array",
          "items": {
            "$ref": "http://socialsweethearts.de/EmbedItem#"
          }
        }
      }
    },
    "ImageItem": {
      "type": "object",
      "properties": {
        "title": {
          "type": "string"
        },
        "description": {
          "type": "string"
        },
        "url": {
          "type": "string"
        },
        "license": {
          "type": "string"
        }
      },
      "required": [
        "url"
      ],
      "additionalProperties": false
    }
  }
}