A resource is data that is owned by a resource owner and that you can access with an external OAuth 2.0 client enabled application, for example an application in the cloud or on premise or a mobile device. Typical data can be business data, project data, or any kind of documents. A unique URL points to the resource. For example, a SAP NetWeaver Gateway OData service protects such a resource.
For more information, see OAuth 2.0 Scopes.and