{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/imf/refs/heads/main/json-schema/data-message.json",
  "title": "DataMessage",
  "description": "SDMX 3.0 JSON data message returned by IMF data queries containing time-series observations",
  "type": "object",
  "properties": {
    "meta": {
      "type": "object",
      "description": "Message metadata",
      "properties": {
        "schema": {
          "type": "string",
          "description": "SDMX JSON schema URI"
        },
        "id": {
          "type": "string",
          "description": "Message unique identifier"
        },
        "test": {
          "type": "boolean",
          "description": "Whether this is a test message"
        },
        "prepared": {
          "type": "string",
          "format": "date-time",
          "description": "Timestamp when the message was prepared"
        },
        "sender": {
          "type": "object",
          "description": "Sender information",
          "properties": {
            "id": { "type": "string" },
            "name": { "type": "string" }
          }
        }
      }
    },
    "data": {
      "type": "object",
      "description": "Data payload",
      "properties": {
        "structures": {
          "type": "array",
          "description": "Structure references needed to interpret the data",
          "items": {
            "type": "object",
            "properties": {
              "links": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "href": { "type": "string", "format": "uri" },
                    "rel": { "type": "string" }
                  }
                }
              },
              "dimensions": {
                "type": "object",
                "description": "Dimension references with their positions",
                "properties": {
                  "dataset": { "type": "array", "items": { "type": "object" } },
                  "series": { "type": "array", "items": { "type": "object" } },
                  "observation": { "type": "array", "items": { "type": "object" } }
                }
              },
              "attributes": {
                "type": "object",
                "description": "Attribute references"
              },
              "measures": {
                "type": "object",
                "description": "Measure references"
              }
            }
          }
        },
        "dataSets": {
          "type": "array",
          "description": "Data sets containing the actual observations",
          "items": {
            "type": "object",
            "properties": {
              "action": {
                "type": "string",
                "description": "Action associated with this dataset (e.g., Information)",
                "enum": ["Append", "Replace", "Delete", "Information"]
              },
              "series": {
                "type": "object",
                "description": "Map of series key to series data",
                "additionalProperties": {
                  "type": "object",
                  "properties": {
                    "attributes": {
                      "type": "array",
                      "description": "Series-level attribute values"
                    },
                    "observations": {
                      "type": "object",
                      "description": "Map of observation key to observation values",
                      "additionalProperties": {
                        "type": "array",
                        "description": "Array of [value, ...attributes] for this observation"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "required": ["data"]
}