[asadotzler]

FTP wasn't the web and browsers did that right in the main browser window using the primary addressing interface. RSS wasn't the web and web browsers rendered RSS in the main window and using the main addressing interface as well. Email isn't the web but Gmail is and browsers can seamlessly hand off several non-web formats to web clients where needed. Your distinction is real but also meaningless. If a user can do it in a browser, it's a part of the web. If a user cannot do it in a browser and requires a dedicated client, then it's not a part of the web.