When you create a data object and do not configure a data source for it, the data source does not have any defined data pages. When you are ready to define data sources for the data object, you can choose to create simulated sources. If you use simulated sources, the system creates both single (read-only) and list data pages, with the appropriate simulated data source in each data page. This option is useful when you are uncertain about the details of the eventual sources, or if the endpoints are not yet available and you want to start using the data object in application development.

When you create a simulation for a data object that has a data source already configured, the system bases the type of simulation on the type of data source and creates either a single or list data source.

If you create a simulation for a data object that has an aggregate source configured, the simulation applies to the entire aggregate source. You cannot simulate the individual sources within the aggregate source.

1. In the navigation pane of App Studio, click Data.
2. Click the data object for which you want to simulate a data source.
3. Click the Data pages tab.
4. Perform one of the following procedures:
   Note: If you modified your data page in Dev Studio, you might have multiple data sources. If the data object has more than one data source, select the data source that you want to simulate.
   • If a data object has both a data source and a simulation configured:
     1. Click MoreToggle simulation.
     2. In the Data Source Simulation Status window, click Close.
   • If a data object does not have a data source configured, for example, you chose to define your data source later:
     1. Click Create simulated sources.
     2. Click OK.

        Data pages are displayed with an undefined, simulated source.

     3. Optional: You can define a source by choosing one of the following options, and then following the prompts:
        • Click MoreToggle simulation.
        • In the Source column, click Configure source.
   • If a data object has a data source configured but does not have a simulation configured:
     1. Click MoreToggle simulation.
     2. In the Data Source Simulation Status window, click Continue.

What to do next: Click the Records tab to add sample records to define the data that populates the fields in your data object. Turn off the simulation and connect to your actual data source when it becomes available.