"Apocalyptic – those ancient visionary writings which purport to reveal the mystery of the end of the age and of the glories of the age to come.
"Prophecy – an utterance of a prophet, one who claims to speak for God.  Since it often pertained to the future, comes to be identified with foretelling future events.  Usually distinguished from narrative, law, psalms, wisdom; but not strictly a category of form, but rather of claimed source.
Soulen, Handbook of Biblical Criticism