Dataset

Field	Type	Description
`fields`	list *
`fields[]`	DatasetField
`fields[]`.`id`	str *
`fields[]`.`title`	str *
`fields[]`.`description`	str *
`fields[]`.`hidden`	bool
`fields[]`.`cast`	enum/str[`string` / `integer` / `float` / `date` / `datetime` / `boolean` / `geopoint` / `geopolygon` / `uuid` / `markup` / `datetimetz` / `unsupported` / `array_str` / `array_int` / `array_float` / `tree_str` / `genericdatetime`] *
`fields[]`.`aggregation`	enum/str[`none` / `sum` / `avg` / `min` / `max` / `count` / `countunique`]
`fields[]`.`calc_spec`	CalcSpec *
`avatars`	AvatarsConfig *	Avatar configuration (analogous to `FROM` section in SQL). For a single data source you can send the `null` value, in this case, an avatar will be created automatically and its ID will be equal to data source ID.
`avatars`.`definitions`	list *
`avatars`.`definitions[]`	AvatarDef
`avatars`.`definitions[]`.`id`	str *
`avatars`.`definitions[]`.`source_id`	str *
`avatars`.`definitions[]`.`title`	str *
`avatars`.`root`	str *
`avatars`.`joins`	list *
`avatars`.`joins[]`	AvatarJoinCondition
`sources`	list *
`sources[]`	DataSource
`sources[]`.`id`	str *
`sources[]`.`title`	str *
`sources[]`.`connection_ref`	str *
`sources[]`.`spec`	DataSourceSpec *