Editing WinFS (section)

====Rules====
WinFS includes ''Rules'',<ref name="Rules">{{cite web |url=http://blogs.msdn.com/winfs/archive/2005/10/10/479416.aspx |title=About WinFS Rules |author=Kati Dimitrova |publisher=[[Microsoft]] |work=[[MSDN]] |access-date=March 2, 2018 |archive-url=https://web.archive.org/web/20081226193655/http://blogs.msdn.com/winfs/archive/2005/10/10/479416.aspx |archive-date=2008-12-26 |url-status=dead }}</ref> which are executed when a certain condition is met. WinFS rules work on data and data relationships. For example, a rule can be created that states that whenever an Item is created which contains field ''"Name"'' and if the value of that field is some particular name, a relationship should be created that relates the Item with some other Item. WinFS rules can also access any external application. For example, a rule can be built which launches a ''Notify'' application whenever a mail is received from a particular contact.<ref name="Rules" /> WinFS rules can also be used to add new properties fields to existing data Items.<ref name="Rules" />

WinFS rules are also exposed as .NET CLR objects. As such any rule can be used for any purpose. A rule can even be extended by inheriting from it to form a new rule that consists of the condition and action of the parent rule plus something more.<ref name="Rules" />