Creating a data connection definition
A data connection definition defines the connection properties for a data source. Connection properties include connection type, security policy, user name, and password. The first time you create a data connection definition for a project, Information Object Designer creates the IO Designs folder hierarchy in the project folder. For example, for the project MyProject, Information Object Designer creates the folder hierarchy /IO Designs/MyProject/Data Sources. The folder hierarchy contains the MyProject subfolder because all information object files are published to the IO Designs subfolder in the Encyclopedia volume’s Resources folder using the same relative path used in the workspace, and the project name is required to distinguish one project’s information object files from another’s.
Information Object Designer then creates a subfolder in the project’s Data Sources folder to contain the data connection definition file. For example, if you create a data connection definition for the database MyDatabase, Information Object Designer creates the subfolder MyDatabase and the data connection definition file _MyDatabase.dcd, as shown in Figure 2-4.
A data connection definition file name has a .dcd extension. Data connection definition file names are not case-sensitive.
Figure 2-4  

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