There is already an ability to have an instance with content and no specified versions.  You only need to use the 'versions' structure if you have more than one. In the case where you have multiple versions, there is utility to have titles and descriptions for the overall instance, as well as for the different versions. For example: Instance 1: Title = "Initial prescription", Description = "Initial order for drug X"   V1: Title = "Initial Draft", Description = "Unsigned draft of original order   V2: Title = "Signed order", ...   V3: Title = "Completed order", ... Instance 2: Title = "Renewal prescription", ...   If we collapsed version and instance together, this would no longer be possible.