A simple example of nested PowerShell DSC Configurations used to modularize a more complex configuration for a Node

Configuration-CombinedWebServer.ps1

Configuration AspNet45WebServer {

    WindowsFeature WebAspNet45 {
        Name = 'Web-Asp-Net45'
        Ensure = 'Present'
    }

    WindowsFeature WebWindowsAuth {
        Name = 'Web-Windows-Auth'
        Ensure = 'Present'
    }

}

Configuration AspClassicWebServer {
    param ($EnsureBasicAuth)

    WindowsFeature WebAsp {
        Name = 'Web-ASP'
        Ensure = 'Present'
    }

    WindowsFeature WebBasicAuth {
        Name = 'Web-Basic-Auth'
        Ensure = $EnsureBasicAuth
    }

}

Configuration CombinedWebServer {

    Node localhost {
        AspNet45WebServer aspnet45 {}

        AspClassicWebServer classic {
            EnsureBasicAuth = 'Present'
        }
    }
}