Technologies are provided for implementing logical data object (LDO) web services. A web service definition can be received that comprises a LDO view and one or more service operation definitions. A LDO web service can be generated based on the web service definition and registered with a service endpoint. Web service requests received at the registered endpoint can be processed using the LDO web service. The runtime engine can perform service operations defined in the web service definition using one or more instances of the LDO associated with the LDO service. The LDO view can include one or more custom LDO extension nodes and/or extension data elements. A design-time application can be provided that comprises a user interface for creating a LDO web service definition. The created web service definition can be transmitted to an application server where a LDO web service can be generated based on the definition.