{
  "walker": "jsonschema-draft4",
  "rules": [
    {
      "vocabulary": "core",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/upgrade-official-metaschema",
        "type": "object",
        "required": [ "$schema" ],
        "properties": {
          "$schema": {
            "const": "http://json-schema.org/draft-04/schema#"
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "schema" },
          { "$$schema": "http://json-schema.org/draft-06/schema#" }
        ]
      }
    },
    {
      "vocabulary": "core",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/id",
        "type": "object",
        "required": [ "id" ],
        "properties": {
          "id": {
            "type": "string"
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "omit(schema, 'id')" },
          {
            "$$id": {
              "$eval": "schema.id"
            }
          }
        ]
      }
    },
    {
      "vocabulary": "validation",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/boolean-exclusive-minimum-true",
        "type": "object",
        "required": [ "minimum", "exclusiveMinimum" ],
        "properties": {
          "minimum": {
            "type": "number"
          },
          "exclusiveMinimum": {
            "const": true
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "omit(schema, 'minimum')" },
          {
            "exclusiveMinimum": {
              "$eval": "schema.minimum"
            }
          }
        ]
      }
    },
    {
      "vocabulary": "validation",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/boolean-exclusive-maximum-true",
        "type": "object",
        "required": [ "maximum", "exclusiveMaximum" ],
        "properties": {
          "maximum": {
            "type": "number"
          },
          "exclusiveMaximum": {
            "const": true
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "omit(schema, 'maximum')" },
          {
            "exclusiveMaximum": {
              "$eval": "schema.maximum"
            }
          }
        ]
      }
    },
    {
      "vocabulary": "validation",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/boolean-exclusive-minimum-false",
        "type": "object",
        "required": [ "minimum", "exclusiveMinimum" ],
        "properties": {
          "minimum": {
            "type": "number"
          },
          "exclusiveMinimum": {
            "const": false
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "omit(schema, 'exclusiveMinimum')" }
        ]
      }
    },
    {
      "vocabulary": "validation",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/boolean-exclusive-maximum-false",
        "type": "object",
        "required": [ "maximum", "exclusiveMaximum" ],
        "properties": {
          "maximum": {
            "type": "number"
          },
          "exclusiveMaximum": {
            "const": false
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "omit(schema, 'exclusiveMaximum')" }
        ]
      }
    },
    {
      "vocabulary": "core",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/empty-object",
        "const": {}
      },
      "transform": {
        "$eval": "true"
      }
    },
    {
      "vocabulary": "core",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/negated-empty-object",
        "const": { "not": true }
      },
      "transform": {
        "$eval": "false"
      }
    },
    {
      "vocabulary": "validation",
      "condition": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "$id": "https://github.com/sourcemeta/alterschema/rules/jsonschema-draft4-to-draft6/enum-to-const",
        "type": "object",
        "required": [ "enum" ],
        "properties": {
          "enum": {
            "type": "array",
            "minItems": 1,
            "maxItems": 1
          }
        }
      },
      "transform": {
        "$merge": [
          { "$eval": "omit(schema, 'enum')" },
          {
            "const": {
              "$eval": "schema.enum[0]"
            }
          }
        ]
      }
    }
  ]
}