Covers the background, development process, and content of the National Minimum Data Set for the period 1 July 2000 to 30 June 2001, and reviews data development changes that will be implemented during the 2001-02 collection. It also provides detailed definitions for every data element included in the National Minimum Data Set. This report will be useful to policy makers, health administrators, information managers and service providers that are working in the alcohol and other drug treatment services field, particularly those involved in the collection of the data set.