Исправление AP, (текущая версия) :
http://en.wikipedia.org/wiki/KDE_Frameworks
Ключевая фраза: «KDE Frameworks are grouped in four different tiers according to dependency on other libraries. Tier 1 frameworks only depend on Qt or other system libraries. Tier 2 frameworks can depend on tier 1 libraries, Qt and/or other system libraries and so forth.»
Исходная версия AP, :