The following table describes the arguments for this command:

Argument	Required/Optional	Description
map_key1	Required	Any primitive data type. An element that you want to add as a key of the map data. You can enter any valid transformation expression.
map_value1	Required	Any primitive or complex data type. An element that you want to add as a value for the key of the map data. You can enter any valid transformation expression.

If you use the MAP function in an output expression for a map port, the data type of the function arguments must match the data type of the map elements specified in the type configuration for the map port. The map_key cannot be null.

Map.

The data type of arguments determines the data type of the map elements. For example, if you pass integer arguments as key and struct arguments as value, the function generates map data with a key-value pair of integer and struct types.

The following expression generates a map of integer and string elements.