Juvenile justice in Australia 2006-07 is the fourth report on young people in juvenile justice supervision in Australia. It includes information on the characteristics of young people in community-based supervision and detention in 2006-07 and the type and length of supervision they experience, as well as patterns of supervision over time and analyses of trends. The report provides data from the Juvenile Justice National Minimum Data Set (JJ NMDS), which is based on the experience of the young person within supervision rather than on legal orders and contains data from 2000-01. The JJ NMDS was developed by the Australian Institute of Health and Welfare and the Australasian Juvenile Justice Administrators.