The document outlines the specific aims of understanding changes from DSM-IV to DSM-5, appreciating changes to diagnostic criteria for disorders common in veterans, and reviewing new cross-cutting and severity measures. It discusses criticisms of DSM-IV including high comorbidity rates and outdated criteria. The development process included task forces, workgroups, and over 200 publications. DSM-5 has three sections and changes the framework by removing Roman numerals and consolidating some disorders.