To create a basic Map of values, which is the correct formatting for the expression?

The correct formatting to create a basic Map of values in Appian is represented by the syntax that uses key-value pairs. In this instance, the expression includes keys such as "make," "type," "year," and "mileage," each associated with their respective values. This is crucial because a Map in Appian is structured to use named keys to provide clarity and organization, allowing for easy access to specific values later in the code.

Using this syntax with key-value pairs makes it possible to retrieve values by referencing their keys, which enhances code readability and maintainability. For example, if you want to obtain the "make" of the vehicle, you would simply refer to the key "make" in the Map.

The other provided formats do not follow this structure and thus would not work properly. For instance, one option lists values without keys, while others attempt to use incorrect syntax that won't compile in Appian. The importance of using key-value pairs effectively underlines the design of Appian's data structure, reinforcing why the choice with the proper structure stands out as the correct answer.