In geopolitical terms, Carpathian Mountains are often grouped and labeled according to national or regional borders, but such division has turned out to be relative, since it was, and still is dependent on frequent historical, political and administrative changes of national or regional borders. According to modern geopolitical division, Carpathians can be grouped as: Serbian, Romanian, Ukrainian, Polish, Slovakian, Czech, Austrian, and Hungarian. Within each nation, specific classifications of the Carpathians have been developing, often reflecting local traditions, and thus creating terminological diversity, that produces various challenges in the fields of comparative classification and international systematization.