What's the difference between novatian and schismatic?

Novatian

Definition:

(n.) One of the sect of Novatius, or Novatianus, who held that the lapsed might not be received again into communion with the church, and that second marriages are unlawful.

Example Sentences:

Definition:

(a.) Of or pertaining to schism; implying schism; partaking of the nature of schism; tending to schism; as, schismatic opinions or proposals.
(n.) One who creates or takes part in schism; one who separates from an established church or religious communion on account of a difference of opinion.

Example Sentences:

(1) Maybe we’ll drag it out of them.” But in recent years the old schismatic European scar has been itching.
(2) In fiction, there has already been an Innocent XIV, in The Fourth K , a 1990 novel by Mario Puzo , and a previous Pius XIII, in The Shoes of the Fisherman , the 1963 novel by Morris West that can be seen as the rock on which all modern pontifical fictions are based, although the genre of fake papacies has a long tradition: Christopher Marlowe gives the real Pope Adrian IV a schismatic rival, Pope Bruno, in his late 16th century tragedy, Doctor Faustus .
(3) No.” Ordinary Catholics who attend the government-controlled church welcome the negotiations as any deal would legitimise what is essentially a schismatic church.