Following a brief review of the current observational picture of outflows from low- and intermediate-mass young stellar objects, various theoretical model ingredients are discussed, focusing on a scenario in which the outflows correspond to centrifugally driven winds from magnetized accretion disks. Among the topics considered are the wind kinematics and dynamics, the outflow thermal and ionization structure, and nonsteady ejection. Particular attention is paid to some of the outstanding questions in both theory and observations.