Imagine a user's personal profile that they want to use across applications on Skynet. A web app could load a User Profile DAC library which creates an iframe with the DAC code. This allows for API-like access to shared code for reading and modifying the user's profile. All write-access goes through the DAC and by exposing an API for modifications, no application needs to worry that another application will corrupt the profile data or break standard specifications of the shared file.