In its revised version first outlined in 2001, the ICIDH was renamed the International Classification of Functioning, Disability and Health, initially called the ICIDH-2 (100; 101) and subsequently the ICF (102). This has refocused attention away from the consequences of disease toward functioning as a component of health (102, p81). The ICF provides codes for the complete range of functional states; codes cover body structures and functions, impairments, activities, and participation in society. It also considers contextual factors that may influence activity levels, so that function is viewed as a dynamic interaction between health conditions (e.g., disease, injury) and the context in which the person lives including physical environment and cultural norms relevant to the disease. It establishes a common language for describing functional states that can be used in comparing diseases and statistics from reporting countries. Compared with ICIDH, the language is positive, so that “activity” and “participation” replace “disability” and “handicap.” The ICF is described on the WHO web site at www.who.int/classification/icf, and chapter headings are listed by Üstün et al. (102, Table 2).