Creating the schema

After Visual Studio has successfully compiled the previously created DTDL file, you will find a BDTD file inside the "_data" subfolder of your project folder.

Now we can add the class and list definitions of our BDTD file to the database schema. This is normally done with the Extend-Schema command in DataFSTools.

Open DataFS_Tools.exe as an admin (normally '%ProgramFiles%\Mobiland DataFS Server') and execute the following commands with the appropriate path to your BDTD file:

Open-Connection
Extend-Schema -DomainGuid "{E9F56A1D-4FD9-483E-A4FE-7522666AB7C6}" -BDTD "-yourPath-\_data\DataDefinition.bdtd"
Close-Connection
exit

Our BDTD files can also be added and the schema extended by loading them from resources in an application and calling the appropriate functions to extend the schema. See How to start for a sample.

Remarks: Definitions (classes, lists, …) that have been added to a schema can never be modified or deleted. If a modified class becomes a necessity, you have to create a copy of the old definition and give it a new GUID.