The latest major version is {311_version} and the corresponding distribution name is `311x` (with an "x" as the suffix).
For older releases use:

* `311x` for C* {311_version} series
* `30x` for C* {30_version} series
* `22x` for C* {22_version} series
* `21x` for C* {21_version} series
* `20x` for C* {20_version} series

For example, to add the repository for version {311_version} (`311x`):
