These services provide functional support for EHRS Business Services to execute the proper data access procedures and transformations required to interact with different registry, EHR Data, Ancillary or Data Warehouse services. In general, the LRS can interact with internal components of an EHRi in one of two ways, it can rely on existing standards-based communication mechanisms and use the HIAL to perform such interactions or it can use more direct or proprietary interfacing mechanisms to access or update data into any one of the registries, EHR data or ancillary services. The data services described herein are used to support the ladder method of more proprietary interfacing mechanism. EHR Data services are used both in the online business scenarios where EHR data is recorded and retrieved as well as in the administration functions to load and manage EHR repository and registry information. The following table further breaks down the Data Services into a functional representation of the capabilities expected of such services in an LRS:

Relations
Name	Type	Begins	Ends
	generalization	Data Services	Longitudinal Record Services
	generalization	Key Management Services	Data Services
	generalization	Data Access Services	Data Services
	generalization	ETL Services	Data Services
	generalization	Replication Services	Data Services