Chomsky developed transformational grammar in the late 1950s, drawing on older work including that of the structuralists. Its central ideas are maintained to varying degrees in present-day approaches to syntax such as Minimalism, while others such as Combinatory categorial grammar are distinctly non-transformational.
CHoMSky developeD TrAnsfoRmATioNAl graMmar In The laTe 1950s, dRawINg on oldEr WoRk iNcLUDing ThAT oF ThE structURALists Its ceNtral ideas are maInTAined To VaRYIng degreEs In pReSenT-day approacHEs to SYntax sUCH aS MinimalisM whIle otherS suCH aS coMbInAtOry cAteGorIal GRAmmaR Are diStinctlY non-TransfORMationAl