In Anna Freud’s and other previous versions of the diagnostic profile, drive theory and the structural model were the central organizing concepts. Though these are retained in the current version, greater emphasis has been made of other conceptual perspectives. In particular, the importance of understanding the impact of the child’s external world and the child’s attachment security; also the central importance of affects, both their recognition and management. These changes are seen in such sections as those on the ego which has been expanded to include a section on play and affects. The developmental line of anxiety and the concept of theory of mind have also been added.