1. IT Infrastructure Planning Committee Service Model Task Service Layer Entity Service Layer Utility Service Layer Logical service abstraction layers categorize services by: the type of logic they encapsulate, the extent of reuse potential this logic has, and how this logic relates to domains within the enterprise reuse less more

2. IT Infrastructure Planning Committee Document Sharing Example Document Sharing ServiceDocument Sharing Service Use CasesUse Cases –Query for Documents –Retrieve Documents –Publish Documents RequirementsRequirements –Ability to find and retrieve documents across a distributed community of care –Ability to match patients to their data without a national patient identifier –Secure exchange of information Document Sharing

3. IT Infrastructure Planning Committee Service Modeling ServiceTypeQueryPublishRetrieve GetPatientLHRTask X-X IdentityEntity XOX DocumentEntity XXX RegistryUtility XXX RepositoryUtility -XX PIXMgrUtility XOX PDQMgrUtility X-X AuditUtility XXX Use Cases

4. IT Infrastructure Planning Committee Document Sharing Functional Architecture Entity Services Utility Services Data Task Services EMPI Registry Repository Logs PIX Mgr PDQ Mgr Registry Repository Audit Identity Document GetPatientLHR

5. IT Infrastructure Planning Committee High-Level Component Diagram AuditPIX Mgr DocumentIdentity EMPIRegistryRepositoryLogs Registry Repository Entity Services Utility Services Data PDQ MgrGet Patient LHR Task Services

6. IT Infrastructure Planning Committee XDS Document Sharing Utility Services 5 Utility services to handle core XDS Infrastructure functions

7. IT Infrastructure Planning Committee Entity Services Document and Identity Composed Utility Service New Entity Services

8. IT Infrastructure Planning Committee Task Service GetPatientLHR (Longitudinal Health Record)

9. IT Infrastructure Planning Committee Deployment Example Deployment Example: in this topology, the GetPatientLHR, Document and Identity services are deployed in a gateway application in the requesting domain. This provides a simple set of interfaces for the LHR service to facilitate document query and retrieval from the XDS infrastructure deployed across a community of care. In this model the Identity service brokers access to the PIX/PDQ infrastructure whilst ensuring the legacy patient identity feed data is compliant with ITI-8. The Document service handles XDS registry queries and facilitates federated document retrieval across a distributed set of repositories. Outside of the HIE domain B, which hosts the Registry/repository and shared PIX/PDQ manager services, the other domains also implement the Document and Identity services to facilitate XDS publish, query and retrieval capabilities