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HL7 SOA-Aware Enterprise Architecture

HL7 SOA-Aware Enterprise Architecture. Executive Summary HITSP October 28, 2008. The Goal of the HL7 Enterprise Architecture Working Interoperability. In the end, this is what we need for any interoperability: Definition of Information to be exchanged

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HL7 SOA-Aware Enterprise Architecture

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  1. HL7 SOA-Aware Enterprise Architecture Executive Summary HITSP October 28, 2008

  2. The Goal of the HL7 Enterprise ArchitectureWorking Interoperability • In the end, this is what we need for any interoperability: • Definition of Information to be exchanged • Definition of Functions by which the information is exchanged • Mappings to Real World Events and Business Processes • Reference Terminology / Language for understanding these things • Engineering / Technology Bindings to deliver these things • HL7 and its Standardized Specifications should deliver these things for stakeholders so that actual Implementations may be built

  3. Who needs Working Interoperability?The Users of an HL7 Service Specification • Two or more groups interested in collaborating and sharing healthcare/life sciences data/information using computer systems • No assumption of any scale • Nations • Enterprises • Individuals

  4. What do the “clouds” need to interoperate?Requirements for Implementable Working Interoperability • Computable Semantic Interoperability (CSI) – • Measurable goals, • “Plug and play” patterns of implementation • Incremental adoption yields Incremental Benefit • Implementable Specifications • Including governance as modeled, testable specifications • Conformance/Compliance Model • Fit with the way organizations model, use, and test components • Implementation Guides (“Are you ready? How does this work with our new ABC Interface Engine?”) • Services (and service realizations) that reflect the “…ilities” • Scalability, composability, extensibility, etc.

  5. The SAEAF (Part 1)Services • Services are abstract specifications that explicitly define the semantics necessary to unambiguously specify a testable, enforceable run-time contract between two enterprise-level components, i.e., there is an explicit definition of the service's semantics for integration context, operations, informational components, and both internal and external behaviors. • From Objects, Messages, and Services: A Comparison; Koisch and Mead; Whitepaper, 2008 • Services (and SOA) are not technology per se. Rather, they are a framework for approaching the problem of how to design distributed capabilities (information and functionality sharing). They are not equivalent to Web Services • The HL7 Services Aware Enterprise Architecture Framework (SAEAF, pronounced “SAFE”) was commissioned to find the language, processes, and artifacts to talk about a Enterprise Architecture appropriate for an SDO.

  6. The SAEAF (Part 2)HL7, MDA, CSI, SOA, and Distributed Systems Architecture • The intersection of HL7, MDA, Distributed Systems Architecture, SOA, and CSI provide a goal, the artifacts, portions of a methodology, and the framework for defining robust, durable business-oriented constructs that provide extensibility, reuse, and governance. Health Level 7 Service Oriented Architecture Computable Semantic Interoperability Reference Model For Open Distributed Processing Model Driven Architecture You are here (Vousêtesici)

  7. The SAEAF (Part 3)RM-ODP Multi-Dimensional Specification Pattern from the 5 Viewpoints Why? What? How? Where? True? ISO Standard (RM – ODP, ISO/IEC IS 10746 | ITU-T X.900 )

  8. The SAEAF (Part 4)The HL7 Specification Stack – Detail of the The Specification and Conformance Patterns

  9. The SAEAF Applied Incremental approach to Working Interoperability through Conformance • Two parties who wish to integrate build on the Specification Stack to achieve “Working Interoperability.” • C and D have the easiest time interoperating because they agree on a platform. This is desirable, but not a precondition to interoperability. • Should B wish to interoperate with D, B will need to write adapters that provide semantic interchanges for policy, behavior, and information, which would be derivable from examining the specifications. • B and E can interoperate by agreeing on a Blueprint Specification, but they will have to write adapters to provide semantic interchanges (as above). • A has the farthest to go to interoperate with anyone else. Adapters will have to be written to traverse several layers (as above) C D B Platforms E Platform-Independent A Blueprints Reference • A is Referentially Conformant to HL7 • B has Platform-Independent Conformance to HL7 • C has Platform-Bound Conformance to HL7 • D has Platform-Bound Conformance to HL7 • E is Blueprint Conformant to HL7

  10. The SAEAF Applied (2)Governance and Other “Standards” (DRAFT)

  11. Summary – Next Steps for HL7 • Formal Business Architecture Model (BAM) for HL7 • Continued specification of an HL7 Behavioral Framework, including alignment with industry standards • Formalization of Contract Specification • Adoption of Policy / Rules Expression Language • Implications on Process (such as Software Engineering Processes (SEP)) and Tooling • Developmental Governance that supports this framework • Includes potential impacts on publication, tooling, specification development, and inter-workings between WGs • Organizational Collaboration Governance recommendations

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