The datamodel configuration file consists of information to replace the datasources of all datamodels within an OBIEE WebCatalog.  An example snippet of a file is below

The Red text above is the property type.  In this case, it will always be 'datasourceref' as to indicate the datasource reference of the datamodel should be replaced.

The Green text above is the datamodel name as it appears in the WebCatalog.  Only use the datamodel name, do not put the xdm extension on the line.

The Purple text above is the value to be replaced as the datasource reference on deployment. 

Using FlexDeploy properties in the configuration file

FlexDeploy properties can also be used in the configuration file as data source values.  An example is seen below.

Above, you can see the property used in the configuration file.  Below, you can see the property defined on the FlexDeploy workflow used for deploying WebCatalog objects.

And lastly, you can see it configured below on the environment instance.  For more information on using FlexDeploy workflow properties, see Defining Workflow Properties.