Explanation:

The standard Human Development Index (HDI) measures three basic dimensions: a long and healthy life (measured by life expectancy at birth), knowledge (measured by mean and expected years of schooling), and a decent standard of living (measured by GNI per capita, which is related to real per capita income). While infant mortality rate is a health indicator, it's not a direct parameter in the HDI formula itself, but rather life expectancy is. Social inequality is measured by other indices like the Inequality-adjusted HDI (IHDI), but not the standard HDI.