Defining persistent maps, keys, and values

A persistent map can have a key-value pair. The key is a string and the value is an object. The object can have following different attributes:

String of characters (string)

Integer (int)

Real number (float).

The following code example represents how an attribute and its type is defined:

avg_resp_time:float,
max_time:int,
current_user:string

The previously mentioned attributes are explained below:

avg_resp_time, a number of type real, records the average response time of all requests monitored to date (the time unit depends on the application and is matter of interpretation: it could be seconds, minutes, hours, etcetera).

max_time, a number of type integer, records the maximum response time recorded to date.

current_user, a string of characters, records the user ID of the last monitored request.