The Data Definition object is the source and destination of a Map.
There are always two Data Definition objects in each Map, and these can be accessed through source and dest. This allows you to interact with the properties of the Data Definition used on the Map.
Among other things, the following tasks can be achieved by working with the Data Definition object -
Accessing the File Connection object - this provides access to the File Connection object through the TFloFileCon property.
Accessing the DB Connection object - this provides access to the DB Connection object through the TFloDBCon property.