Each module is expected to have an init.pp file defined which has the top level class definition; in the case of our base example, init.pp is expected to contain class base { }.

Now, if we include base::subitem in our node manifest, then the file that Puppet would search for will be base/manifests/subitem.pp, and that file should contain class base::subitem { }.

It is also possible to have subdirectories of the manifests directory defined to split up the manifests even more. As a rule, a manifest within a module should only contain a single class. If we wish to define base::subitem::subsetting, then the file would be base/manifests/subitem/subsetting.pp, and it would contain class base::subitem::subsetting { }.

Naming your files correctly means they will be loaded automatically as needed, and you won't have to use the import function. By creating multiple subclasses, it is easy to separate a module into its various components; this is important later when you need to include...