In the documentation of the SModel language the notion of "repository" is used, for example in https://www.jetbrains.com/help/mps/smodel-language-types.html#types
However, I am unable to find a definition in the documentation nor a description of its purpose in life. Looking up the concept definition of SRepository in org.jetbrains.mps.openapi.module did not help too much. Is is a synonym for a module or a collection of modules?
Please enlighten me.