Populated places in Ukraine are split into two categories: urban and rural. Urban populated places are split further into cities and urban-type settlements (a Soviet administrative invention), while rural populated places consist of villages and settlements (a generally used term). All cities have certain degree of self-rule depending on their significance such as national significance (as in the case of Kyiv and Sevastopol), regional significance (within each oblast or autonomous republic) or district significance (all the rest of cities). A city's significance depends on several factors such as its population, socio-economic and historical importance, infrastructure and others.