# Examples of nested data types
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For the `struct<given:varchar, family:varchar>` type, there are two attribute names: `given`, and `family`, each corresponding to a `varchar` value.

For the `array<varchar>` type, the array is specified as a list of `varchar`. 

The `array<struct<shipdate:timestamp, price:double>>` type refers to a list of elements with `struct<shipdate:timestamp, price:double>` type. 

The `map` data type behaves like an `array` of `structs`, where the attribute name for each element in the array is denoted by `key` and it maps to a `value`. 

**Example**  
For example, the `map<varchar(20), varchar(20)>` type is treated as `array<struct<key:varchar(20), value:varchar(20)>>`, where `key` and `value` refer to the attributes of the map in the underlying data.   
For information about how AWS Clean Rooms enables navigation into arrays and structures, see [Navigation](query-nested-data.md#navigation).  
For information about how AWS Clean Rooms enables iteration over arrays by navigating the array using the FROM clause of a query, see [Unnesting queries](query-nested-data.md#unnesting-queries).