fig-standards/accepted/PSR-0.md at master · php-fig/fig-standardsA fully-qualified namespace and class must have the following structure \<Vendor Name>\(<Namespace>\)*<Class Name> Each namespace must have a top-level namespace ("Vendor Name"). Each namespace can have as many sub-namespaces as it wishes. Each namespace separator is converted to a DIRECTORY_SEPARATOR when loading from the file system. Each _ character in the CLASS NAME is converted to a DIRECTORY
