What database artifact is used to access external data from an XS Advanced project?

In the context of XS Advanced projects in SAP HANA, the use of a synonym is essential for accessing external data. A synonym acts as an alias for a database object and enables applications to refer to that object in a straightforward manner. When dealing with external data sources, creating a synonym allows developers to access the underlying table or view without needing to specify the full details of the schema or connection each time.

Using a synonym simplifies the process of querying external data by providing a consistent naming convention, which abstracts the actual source definition. This capability is particularly important in XS Advanced, as it promotes modularity and reusability of database objects. It helps developers focus on building the application logic rather than getting bogged down with the intricacies of various data sources.

Other options, while potentially relevant in different contexts, do not specifically serve the primary function of accessing external data in XS Advanced projects. User-provided services, logical schemas, and calculation views play different roles within the architecture, such as managing user credentials, organizing data representation, or performing complex data calculations, rather than providing direct access to external data sources.