WinFS

WinFS (Windows Future Storage)  was the codename for an advanced storage subsystem slated to be included in Windows Vista. It was designed for persistence and management of structured, semi-structured, and unstructured data. It was included in builds up to the reset (4093), then it was permanently scrapped in 2006 due to many problems with this component including memory leaks and startup problems. After getting scrapped, its features were ported over to ADO.NET and Microsoft SQL Server.