BCL(Base classes library) - base classes, enums, extensions for 4D Team packages associated with the following themes validation, environment, app process details, app base url model, client app http routing. Link to the DDDD.BCL package sources https://bitbucket.org/dddd4dteam/dddd4d-tools/src and then BCL folder.
$ dotnet add package DDDD.BCLNo README available.