In a wedding what is the prelude music, processional music, and recessional music? When are each played?

The prelude is played before the bridal party's entrance. The processional is played when the bridal party enters and the recessional is played when the bridal couple walks back down the aisle after the wedding. You can get suggestions for this music here: a href="http://www.topweddingsites.com/wedding_ceremony_music.html" rel="nofollow"http://www.topweddingsites.com/wedding_c…/a