----data operations, presentation ----domain requirements: &"everyone knows that..&" ----complete: all desired functionality is covered ----consistent: they do not contradict each other
----data operations, presentation ----domain requirements: &"everyone knows that..&" ----complete: all desired functionality is covered ----consistent: they do not contradict each other
requirements that define specific behavior or functions. what a system is supposed to do. they are stated such as &"the system shall do...&"