1. Oracle Corporation. (2024). Working with Planning for Oracle Enterprise Performance Management Cloud. Chapter 8: Designing Dashboards 2.0, Section: "About Dashboards 2.0".
Quote: "You can create dashboards that include up to six charts, each with its own data source, which can be a form, ad hoc grid, or cube." This section explicitly lists the three valid data sources.
2. Oracle Corporation. (2024). Administering Planning for Oracle Enterprise Performance Management Cloud. Chapter 10: Designing Dashboards 2.0, Section: "Creating a Dashboard 2.0".
Reference: This chapter details the process of creating a dashboard, where the first step after adding a chart is to select a data source. The available options presented in the user interface and documentation are Forms, Ad Hoc Grids, and Cubes.