Semi-Pelagianism and Pelagianism

Catholic view as stated here: from comment 49 http://www.calledtocommunion.com/2009/10/a-reply-from-a-romery-person/

Semi-Pelagianism claims that we (without grace) make the first move, then God gives grace in response. Pelagianism denies that God needs to give grace at all, in order for us to be saved. Pelagianism denies the necessity of grace for salvation. Semi-Pelagianism denies the necessary of prevenient grace (i.e. operative actual grace, where God acts upon us, without us), but does not deny the need for grace for salvation.