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{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "data",
    "meta"
  ],
  "properties": {
    "data": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "code",
        "name",
        "topic_code",
        "topic",
        "unit",
        "periodicity",
        "license",
        "first_year",
        "last_year",
        "value_count",
        "source",
        "license_url",
        "citation_note",
        "definition",
        "values"
      ],
      "properties": {
        "code": {
          "type": "string",
          "description": "World Bank indicator code, e.g. IT.NET.USER.ZS."
        },
        "name": {
          "type": "string"
        },
        "topic_code": {
          "type": "string",
          "description": "Identifier of the topic group, as listed by /api/v2/world-bank/indicators/topics."
        },
        "topic": {
          "type": "string",
          "description": "Full World Bank topic."
        },
        "unit": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "string",
              "nullable": true,
              "enum": [
                null
              ]
            }
          ],
          "description": "Unit of measure. Null when the World Bank metadata gives none; the unit is then only in the name."
        },
        "periodicity": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "string",
              "nullable": true,
              "enum": [
                null
              ]
            }
          ]
        },
        "license": {
          "enum": [
            "CC-BY-4.0"
          ]
        },
        "first_year": {
          "type": "integer",
          "minimum": 1960,
          "maximum": 2100
        },
        "last_year": {
          "type": "integer",
          "minimum": 1960,
          "maximum": 2100
        },
        "value_count": {
          "type": "integer",
          "minimum": 1
        },
        "source": {
          "type": "string",
          "description": "Original producer of the data, as credited by the World Bank."
        },
        "license_url": {
          "type": "string",
          "format": "uri"
        },
        "citation_note": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "string",
              "nullable": true,
              "enum": [
                null
              ]
            }
          ],
          "description": "Attribution requested by the World Bank for third-party use, when any."
        },
        "definition": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "string",
              "nullable": true,
              "enum": [
                null
              ]
            }
          ]
        },
        "values": {
          "type": "array",
          "description": "Values for the requested years, oldest first. Years without a value are omitted.",
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "year",
              "value"
            ],
            "properties": {
              "year": {
                "type": "integer",
                "minimum": 1960,
                "maximum": 2100
              },
              "value": {
                "type": "number"
              }
            }
          }
        }
      }
    },
    "meta": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "dataset",
        "total",
        "license",
        "retrieved_at",
        "transformation_version",
        "sources"
      ],
      "properties": {
        "dataset": {
          "enum": [
            "world-bank-indicators"
          ]
        },
        "total": {
          "type": "integer",
          "minimum": 0
        },
        "license": {
          "enum": [
            "CC-BY-4.0"
          ]
        },
        "retrieved_at": {
          "enum": [
            "2026-10-15"
          ]
        },
        "transformation_version": {
          "enum": [
            "1.0.0"
          ]
        },
        "sources": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "dataset",
              "producer",
              "source_url",
              "resource_url",
              "license",
              "source_updated_at"
            ],
            "properties": {
              "dataset": {
                "type": "string"
              },
              "producer": {
                "type": "string"
              },
              "source_url": {
                "type": "string",
                "format": "uri"
              },
              "resource_url": {
                "type": "string",
                "format": "uri"
              },
              "license": {
                "enum": [
                  "CC-BY-4.0"
                ]
              },
              "source_updated_at": {
                "type": "string",
                "format": "date"
              }
            }
          }
        }
      }
    }
  }
}