var list
    var clear
    var delete NAME
    var NAME=VALUE
    var NAME

    NAME      the name of the variable
    VALUE     the value of the variable
    FILENAME  the filename of the variable
    Manage persistent variables

    var NAME=VALUE
       sets the variable with the name to the value
       if the value is one of data, time, now it will be
       replaced with the value at this time, the format will be
        date    2017-04-14
        time    11:30:33
        now     2017-04-14 11:30:41
    It will wbe replaced accordingly

    The value can also refer to another variable name.
    In this case the current value will be copied in the named
    variable. As we use the $ sign it is important to distinguish
    shell variables from cms variables while using proper quoting.

    Examples include:

       cms var a=$b
       cms var 'a=$b'
       cms var a=val.b

    The previous command copy the value from b to a. The val command
    was added to avoid quoting.