
Back when Windows Vista was still known as Windows Longhorn, the operating system contained a very interesting and promising feature, a feature promoted as one of the 'pillars' of Longhorn: WinFS. WinFS was a storage subsystem for Windows, based on a relational database, that could contain whatever data you wanted to put in it. Thanks to the relational properties of the database, you could then create relationships between data, or let the computer do that for you.