Meaning of functional sentence perspective

func'tional sen'tence perspec"tive

Pronunciation: [key]
— Ling. Ling.
  1. the organization of a sentence in terms of the role of its elements in distinguishing between old and new information, esp. the division of a sentence into theme and rheme.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.