{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://lionweb.io/serialization.schema.json",
  "title": "LionWeb Serialization",
  "type": "object",
  "properties": {
    "serializationFormatVersion": {
      "type": "string",
      "pattern": "^\\S+(.*\\S)?$"
    },
    "languages": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "key": {
            "$ref": "#/$defs/key"
          },
          "version": {
            "$ref": "#/$defs/version"
          }
        },
        "required": [
          "key",
          "version"
        ],
        "additionalProperties": false,
        "minProperties": 2,
        "maxProperties": 2
      },
      "uniqueItems": true
    },
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "$ref": "#/$defs/id"
          },
          "classifier": {
            "$ref": "#/$defs/metaPointer"
          },
          "properties": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "property": {
                  "$ref": "#/$defs/metaPointer"
                },
                "value": {
                  "oneOf": [
                    {
                      "type": "string"
                    },
                    {
                      "type": "null"
                    }
                  ]
                }
              },
              "required": [
                "property",
                "value"
              ],
              "additionalProperties": false,
              "minProperties": 2,
              "maxProperties": 2
            }
          },
          "containments": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "containment": {
                  "$ref": "#/$defs/metaPointer"
                },
                "children": {
                  "type": "array",
                  "items": {
                    "$ref": "#/$defs/id"
                  },
                  "uniqueItems": true
                }
              },
              "required": [
                "containment",
                "children"
              ],
              "additionalProperties": false,
              "minProperties": 2,
              "maxProperties": 2
            }
          },
          "references": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "reference": {
                  "$ref": "#/$defs/metaPointer"
                },
                "targets": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "resolveInfo": {
                        "oneOf": [
                          {
                            "type": "string"
                          },
                          {
                            "type": "null"
                          }
                        ]
                      },
                      "reference": {
                        "oneOf": [
                          {
                            "$ref": "#/$defs/id"
                          },
                          {
                            "type": "null"
                          }
                        ]
                      }
                    },
                    "required": [
                      "resolveInfo",
                      "reference"
                    ],
                    "additionalProperties": false,
                    "minProperties": 2,
                    "maxProperties": 2
                  }
                }
              },
              "required": [
                "reference",
                "targets"
              ],
              "additionalProperties": false,
              "minProperties": 2,
              "maxProperties": 2
            }
          },
          "annotations": {
            "type": "array",
            "items": {
              "$ref": "#/$defs/id"
            },
            "uniqueItems": true
          },
          "parent": {
            "oneOf": [
              {
                "$ref": "#/$defs/id"
              },
              {
                "type": "null"
              }
            ]
          }
        },
        "required": [
          "id",
          "classifier",
          "properties",
          "containments",
          "references",
          "annotations",
          "parent"
        ],
        "additionalProperties": false,
        "minProperties": 7,
        "maxProperties": 7
      },
      "uniqueItems": true
    }
  },
  "required": [
    "serializationFormatVersion",
    "languages",
    "nodes"
  ],
  "additionalProperties": false,
  "minProperties": 3,
  "maxProperties": 3,
  "$defs": {
    "id": {
      "type": "string",
      "minLength": 1,
      "pattern": "^[a-zA-Z0-9_-]+$"
    },
    "key": {
      "$ref": "#/$defs/id"
    },
    "version": {
      "type": "string",
      "minLength": 1
    },
    "metaPointer": {
      "type": "object",
      "properties": {
        "language": {
          "$ref": "#/$defs/key"
        },
        "version": {
          "$ref": "#/$defs/version"
        },
        "key": {
          "$ref": "#/$defs/key"
        }
      },
      "required": [
        "language",
        "version",
        "key"
      ],
      "additionalProperties": false,
      "minProperties": 3,
      "maxProperties": 3
    }
  }
}