the nomenclature for the head of state position was changing. at first it was called as the chairman of the central executive committee, then it was called as the "uprising nine" (povstanburo) which was later reorganized into the central military-revolutionary committee (sort of revkom). in mid july 1918 there were some biases about the idea of the ukrainian ssr, but with the help of more nationally inclined bolsheviks such as skrypnyk, zatonsky, and others the government of the soviet ukraine was preserved. after the defeat of directoria the head of state was again called as the chairman of the central executive committee. since 1938 the position began to be called as the chairman of the presidium of verkhovna rada which was abolished in 1990. from 1990 to 1991 it was simply the head of the verkhovna rada until the introduction of the office of the president of ukrainian ssr.