json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "definitions": {
          "Attribute": {
              "type": "object",
              "properties": {
                  "attribute": {
                      "description": "Name of the attribute",
                      "type": "string"
                  },
                  "values": {
                      "description": "List of values of the attribute",
                      "type": "number"
                  }
              }
          }
      },
      "Sample": {
          "type": "object",
          "properties": {
              "id": {
                  "description": "ID of the sample",
                  "type": "string"
              },
              "lon": {
                  "description": "WGS84 longitude",
                  "type": "number"
              },
              "lat": {
                  "description": "WGS84 latitude",
                  "type": "number"
              },
              "label": {
                  "description": "Name of the sample",
                  "type": "string"
              },
              "timeline": {
                  "description": "List of dates",
                  "type": "array",
                  "_uniqueItems": true,
                  "items": {
                      "type": "string"
                  }
              },
              "validdata": {
                  "description": "List of 0 (false) and 1 (true) representing the valid observations",
                  "type": "array",
                  "items": {
                      "type": "integer"
                  }
              },
              "attributes": {
                  "description": "List of attributes",
                  "type": "array",
                  "items": {
                      "$ref": "#/definitions/Attribute"
                  }
              }
          }
      },
      "required": [
          "Attribute",
          "Sample"
      ],
      "properties": {
          "Attribute": {
              "$ref": "#/definitions/Attribute"
          },
          "Sample": {
              "$ref": "#/Sample"
          }
      }
  }