Release Notes: When compared to release 1.2, DBD 1.4 is a more stable version with interface and scripting generation fixes. If you want to create a multidatabase model, you have two options. The first is to use only data types supported on all databases. These types are: char, varchar, float and integer. You can use boolean types as char(1) and time stamp types as char(15) (YYYYMMDDMMSSSSS). The second option is to create conceptual data types and map them to physical data types for each database. The first option is preferred for its simplicity.