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.
