These guidelines provide consistent ways of collecting and classifying ethnic group data. We have aimed to provide comparability with the Census as far as possible, while allowing for the practical and justified data collection differences between the Census, surveys, and administrative sources.
The approach also takes into account differences between geographic levels, modes of collection, national and local monitoring purposes and ethnicity-related aspects. It is, however, important to emphasise that there is no single and permanent standard for ethnic group classification but rather flexible standards that are fit for purpose.