Translation of "Versionsnummer" into English

A number assigned by a software developer to identify a particular program at a particular stage, before and after public release. Successive public releases of a program are assigned increasingly higher numbers. Version numbers usually include decimal fractions. Major changes are usually marked by a change in the whole number, whereas for minor changes only the number after the decimal point increases.

a sequence of numbers or letters to signify an increment in publishing a release of something