What should the repo names for Leap be?

Hello all, I hope I am in the right place with my question. It concerns the names of the repositories for Leap in the Build Service. Lately I notice that the names are handled differently. One time the name is openSUSE_Leap_15.4, the other time it is just 15.4. But which is correct? Where is defined and described how to name the repositories? But this does not only affect 15.4. For Leap 15.3 there are even two repos in devel:languages:perl. One is 15.3 and the other is openSUSE_Leap_15.3. Leap 15.4 is still completely missing. What should the name for Leap 15.4 be? Translated with www.DeepL.com/Translator (free version) Best regards Eric