When you first install Studio, all components that require a backing data source are bound to a data source called default.
If no other data sources are present, then Studio creates a placeholder default data source.
The Data Sources and Framework Settings pages are both available from the Control Panel.
To update the default data source:
For example:
{ "server":"localhost", "port":"5555", "datastoreName":"acmeDB" }
For details on creating and managing data sources, see the Oracle Endeca Information Discovery Studio User's Guide.