thank you @Mohamed_Tamer… the naming conventions have not been invented by me, they have been setup by the MIT App Inventor team to make life easier for everyone working with App Inventor or one of its distributions…
@Srrazmi, I already explained in detail, why we are using naming conventions
Feel free to use your own naming conventions in your own project, but if you like to provide an extension for others, then please follow the already defined naming conventions to make life easier for everyone.