{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://datenoio.github.io/undatum/schemas/undatum.schema.v1.json",
  "title": "Inferred table schema (undatum's own format)",
  "description": "Printed by `undatum schema --json`.",
  "type": "object",
  "properties": {
    "schema": {
      "const": "undatum.schema/1",
      "description": "Result layout"
    },
    "id": {
      "type": "string",
      "description": "Table id (file name)"
    },
    "key": {
      "type": "string",
      "description": "Hash of the field list"
    },
    "num_cols": {
      "type": "integer",
      "description": "Number of fields"
    },
    "num_records": {
      "type": "integer",
      "description": "Records read (-1 when not counted)"
    },
    "is_flat": {
      "type": "boolean",
      "description": "No nested fields"
    },
    "description": {
      "type": [
        "string",
        "null"
      ],
      "description": "Description (with --autodoc)"
    },
    "fields": {
      "type": "array",
      "description": "Fields: name, ftype, is_array, description, ..."
    },
    "files": {
      "type": [
        "array",
        "null"
      ],
      "description": "Files with this schema (schema-bulk)"
    },
    "success": {
      "type": "boolean",
      "description": "Inference succeeded"
    },
    "error": {
      "type": [
        "string",
        "null"
      ],
      "description": "Error message when inference failed"
    }
  },
  "required": [
    "schema",
    "fields"
  ]
}