As shown in Figure 2 , existing classifications (such as the international classifications of diseases, functioning and disability, and external causes of injuries; and various Australian standards) are available to classify the classes of 'health issues', 'settings' and 'resources'. The National Public Health Information Working Group has determined that the further development of classifications for the top-level classes of 'functions', 'determinants of health' and 'methods' are required and a priority.