Explanation/Reference:
What Happens When You Create an Entity-Based View Object
When you create an entity-based view object, JDeveloper creates the XML component definition file that
represents the view object's declarative settings and saves it in the directory that corresponds to the name
of its package. For example, if the view object was named StaffList in the devguide.model.queries
package, so the XML file created will be ./devguide/model/queries/StaffList.xml under the project's source
path. This XML file contains the information about the SQL query, the name of the entity usage, and the
properties of each attribute. If you're curious to see its contents, you can see the XML file for the view
object by selecting the view object in the Application Navigator and looking in the corresponding Sources
folder in the Structure Window. Double-clicking on the StaffList.xml node will open the XML in an editor so
you can inspect it.
References: https://docs.oracle.com/cd/B31017_01/web.1013/b25947/bcvoeo002.htm