Data

• UI layer: handled via reading and writing
• Application layer: extensible-data objects
• Data layer: Data objects
• Data objects are simple storage classes
• Most Data objects don't actually do anything
• All Data objects inherit from KTData
• A developer should initial focus on the data layer: creating the Data objects appropriate to store the data
• The application layer for a given Data class is added via the macros DEFINE_EXT_DATA and DEFINE_EXT_DATA_2, which creates the relevant extensible-data class