Students' Guide to Information Technology, 2nd Edition

Student's Guide to Information Technology

minimum and maximum number of characters in an iteration:

enter the minimum number before the '{'and the maximum after

the'}'.

In these examples the minimum equals the maximum,

meaning that there must be exactly that number of iterations.

CALLS = {CALL}

CALL = *information about a call*

@call-id + phone-number + customer-id +

start-time -I- end-time

call-id = identification of

a

call*

{legal-character}

phone-number = *incoming call phone number*

{numeric-digit}

Start-time = *starting time of

a

call*

*units:

hours, minutes, seconds*

4{numeric-digit}4 + : + 2 {numeric-digit} 2

end-time = *finishing tim ...