D Data definition An executable statement where a variable is assigned a value. Data flow An abstract representation of the sequence and possible changes of the state of data objects, where the state of an object is any of creation, usage, or destruction [Beizer]. Data flow diagramA graphical representation of the sequence and possible changes of the state of data objects, where the state of an object is any of creation, usage, or destruction. Decision table: A table showing combinations of inputs and/or stimuli (causes) with their associated outputs and/or actions (effects, which can be used to design test cases.
