SAP Fiori Elements utilizes a metadata-driven approach for SAP Fiori app development.

SAPUI5 Smart Controls must be created by developers to utilize the OData annotations and metadata of SAP Fiori Elements templates.

The SAPUI5 runtime interprets metadata and annotations of the OData service and uses the corresponding views for the Fiori app at startup.

Smart Templates must be used by the developer to consume OData annotations and metadata so the SAPUI5 runtime can use the corresponding view.

App developers must use JavaScript to allow their applications to read OData annotations and metadata