Adding New Features to Your Application
Having a well-tested, well-maintained, and usable application will frequently result in a number of feature requests from users, which is not a bad problem to have! Many of these feature requests will necessitate support for additional HealthVault data types.
When you update your application to access new HealthVault data types, you must request the user to reauthorize your application so that it can access these additional data types. Another feature available from HealthVault is optional rules, which are data type authorization rules that ask permission only for additional data types. In addition to providing a smooth upgrade curve, optional rules also enable you to run an older version of your application side by side with the new version in case your users prefer not to upgrade. You can read more about optional rules at http://msdn.microsoft.com/en-us/library/ff803609.aspx.
Updating the data type rules of an application is not automatic, and an application typically needs to go through the HealthVault Go-Live process at http://msdn.microsoft.com/en-us/healthvault/bb962148 to release updates in the HealthVault production environment.
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