What Is Schism, Father?
The Church distinguishes three specific genres of what it calls the sin of "incredulity" (Catechism of the Catholic Church, no. 2089).By this definition, if obstinately ordaining four bishops against the mandate of the Apostolic See -- or building a church for your daddy -- isn't schism, I don't know what is.
Heresy is the obstinate denial by someone baptized of a truth which is to be believed with divine and "catholic" faith, or it may be an obstinate doubt about such a truth.
Apostasy is the total repudiation of the Christian faith.
Schism is the refusal to submit to the authority of the pope or to join in communion with the members of the Catholic Church subject to him.