{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "description": "Jupyter Interactive Widget State JSON schema.",
  "type": "object",
  "properties": {
    "version_major": {
      "description": "Format version (major)",
      "type": "number",
      "minimum": 2,
      "maximum": 2
    },
    "version_minor": {
      "description": "Format version (minor)",
      "type": "number",
      "minimum": 0,
      "maximum": 0
    },
    "state": {
      "description": "Model State for All Widget Models - keys are model ids, values are model state",
      "type": "object",
      "additionalProperties": {
        "type": "object",
        "properties": {
          "model_name": {
            "description": "Name of the JavaScript class holding the model implementation",
            "type": "string"
          },
          "model_module": {
            "description": "Name of the JavaScript module holding the model implementation",
            "type": "string"
          },
          "model_module_version": {
            "description": "Semver range for the JavaScript module holding the model implementation",
            "type": "string"
          },
          "state": {
            "description": "Serialized state of the model",
            "type": "object"
          },
          "buffers": {
            "description": "Binary buffers in the state",
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "path": {
                  "description": "A path for a binary buffer value.",
                  "type": "array",
                  "items": {
                    "description": "An object key or array index",
                    "type": ["string", "number"]
                  }
                },
                "data": {
                  "description": "A binary buffer encoded as specified in the 'encoding' property",
                  "type": "string"
                },
                "encoding": {
                  "description": "The encoding of the buffer data",
                  "type": "string",
                  "oneOf": [
                    {
                      "enum": ["hex"],
                      "description": "Base 16 encoding, as specified in RFC 4648, section 8 (https://tools.ietf.org/html/rfc4648#section-8)"
                    },
                    {
                      "enum": ["base64"],
                      "description": "Base 64 encoding, as specified in RFC 4648, section 4 (https://tools.ietf.org/html/rfc4648#section-4)"
                    }
                  ]
                }
              },
              "required": ["path", "data", "encoding"]
            }
          }
        },
        "required": ["model_name", "model_module", "state"]
      }
    }
  },
  "required": ["version_major", "version_minor", "state"]
}