Normally, it is possible to add Edge Device specific configurations in the following types, templates or file uploads.

- Templates are either *.txt or *.json based configuration files.

a) In case of *.txt based configuration files, the configuration file supports the configuration for Edge Devices with allocated tags. Any key that you add to the template-based configuration file in the format ""##$<KEY>$##" is replaced by its value that you have allocated to the Edge Devices through the created tags.

To add them you should:

1. Disable the "Versioned" check box in the "Add Configuration to Application" screen.
2. In the "Name" and "Description" input fields under the "Add Template" section, enter the name and the description of the template.
3. Click "Browse" and select the template based configuration file.
4. Fill out the rest of the screen and click "Add".

b) App configurations that base on *.json template files are used to configure and install the app via the IE Application Configuration Service (IE ACS).
By using the IE ACS, the app developer makes it easier for the user to configure an app, if the app needs specific values (configurations) to work properly.
If an app provides a configuration that is compatible with the IE ACS, the app configuration will be rendered in the user interface.

For more information:
https://docs.eu1.edge.siemens.cloud/develop_an_application/ieap/configuring_an_edge_app/json_schemes.html

- File upload configurations are based on configuration files that you upload.
  These configurations depend on the Edge Device on which you want to
  install the app.