{
  "type": "object",
  "properties": {
    "@type": {
      "type": "string",
      "enum": [
        "Article",
        "Discussion",
        "LiveDiscussion",
        "QAndADiscussion",
        "Comment"
      ]
    },
    "application": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "minLength": 1
        },
        "@type": {
          "type": "string",
          "enum": [
            "Application"
          ],
          "default": "Application"
        }
      },
      "required": [
        "@id"
      ]
    },
    "category": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "minLength": 1
        },
        "@type": {
          "type": "string",
          "enum": [
            "Category"
          ],
          "default": "Category"
        }
      },
      "required": [
        "@id"
      ]
    },
    "topic": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "minLength": 1
        },
        "@type": {
          "type": "string",
          "enum": [
            "Topic"
          ],
          "default": "Topic"
        }
      },
      "required": [
        "@id"
      ]
    },
    "author": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "minLength": 1
        },
        "@type": {
          "type": "string",
          "enum": [
            "ServiceUser",
            "Worker"
          ]
        }
      },
      "required": [
        "@id",
        "@type"
      ]
    },
    "title": {
      "type": "string",
      "minLength": 1
    },
    "content": {
      "type": "string",
      "minLength": 1
    },
    "publishStatus": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "enum": [
            "Unpublished",
            "Published"
          ],
          "default": "Unpublished"
        },
        "@type": {
          "type": "string",
          "enum": [
            "PublishStatus"
          ],
          "default": "PublishStatus"
        }
      },
      "required": [
        "@id"
      ]
    },
    "moderationStatus": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "enum": [
            "PendingModeration",
            "PassedModeration",
            "FailedModeration"
          ],
          "default": "PendingModeration"
        },
        "@type": {
          "type": "string",
          "enum": [
            "ModerationStatus"
          ],
          "default": "ModerationStatus"
        }
      },
      "required": [
        "@id"
      ]
    },
    "minAge": {
      "type": "integer",
      "minimum": 0,
      "maximum": 999
    },
    "maxAge": {
      "type": "integer",
      "minimum": 0,
      "maximum": 999
    },
    "startTime": {
      "type": "string"
    },
    "endTime": {
      "type": "string"
    },
    "replyTo": {
      "type": "object",
      "properties": {
        "@id": {
          "type": "string",
          "minLength": 1
        },
        "@type": {
          "type": "string",
          "enum": [
            "Article",
            "Discussion",
            "LiveDiscussion",
            "QAndADiscussion",
            "Comment"
          ]
        }
      },
      "required": [
        "@id",
        "@type"
      ]
    }
  },
  "thumbnail": {
    "type": "object",
    "properties": {
      "@id": {
        "type": "string",
        "minLength": 1
      },
      "@type": {
        "type": "string",
        "enum": [
          "Thumbnail"
        ],
        "default": "Thumbnail"
      }
    },
    "required": [
      "@id"
    ]
  },
  "required": [
    "@id",
    "@type",
    "application",
    "author",
    "content",
    "publishStatus",
    "moderationStatus"
  ]
}