I'm trying to design a way to store data in HealthVault that represents a surgical procedure that has been performed on a patient. Properties that I'm trying to store with that data is the date of the procedure, the name of the procedure, and the condition for which the procedure was performed. I could use the Title and When property of the Procedure type to store the name and date of the procedure, but it doesn't provide a place to store the condition. I see that I could use the Condition type to store the condition, but there would be no place to store the procedure.
Maybe I could use both Condition and Procedure type. However, I've read the blog item titled, "Is there a way to create relationships between items, such as one-to-many or composition?" in the HealthVault FAQ. I agree that "referential integrity could become a thorny issue." It mentions using item exention to add data. Maybe I could use only the Procedure type and store just the condition name in the HealthVaultItemExtension object as described in the MSDN article, "Extending HealthVault data types". However, other applications would most likely not check for my extension.
The question is how do I proceed? Should HealthVault developers create a new type or should I extend the Procedure type and forget about sharing the condition with other applications?
While I'm on this problem, I might as well mention that I have a similar problem with Condition & Medication types.
