Reference Architecture Description - Chief Information Officer

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DoD Reference Architecture DescriptionTable of Contents1 Introduction ....................................................................................................................... 11.1 Purpose ....................................................................................................................................................... 11.2 Background ................................................................................................................................................ 11.3 Approach .................................................................................................................................................... 11.4 Document Structure ............................................................................................................................... 22 Reference Architecture Definition ............................................................................. 33 DoDwide Reference Architecture Description ..................................................... 53.1 Strategic Purpose .................................................................................................................................... 63.2 Principles .................................................................................................................................................... 63.3 Technical Positions ................................................................................................................................. 73.4 Patterns ....................................................................................................................................................... 73.5 Vocabulary ................................................................................................................................................. 84 DoDAF Models Utilized in RA ....................................................................................... 95 Summary ........................................................................................................................... 11Ap pendix A: Reference Architecture Sample Outline ............................................ A1Ap pendix B: Examples of Reference Architectures ................................................ B1B1. OASIS SOA Reference Architecture ............................................................................................. B‐1B2. The Open Group SOA Reference Architecture ....................................................................... B‐2B3. Global Justice Reference Architecture (JRA)........................................................................... B‐3B4. DoD Information Enterprise Architecture ............................................................................... B‐3B5. Service Oriented Architecture Foundation – Army, SOAF‐A ........................................... B‐4B6. IBM Insurance Application Architecture .................................................................................. B‐5Appendix C: References ................................................................................................... C1List of FiguresFigure 1 ‐ Reference Architecture Purpose .................................................................................................. 3Figure 2 ‐ Reference Architecture Relationships ....................................................................................... 4Figure 3 ‐ DoD Enterprise Architecture ......................................................................................................... 5Figure B‐1 ‐ Overview of the OASIS SOA RA and RM ............................................................................ B1Figure B‐2 ‐ Layers of the Open Group SOA Reference Architecture ............................................. B2Figure B‐3 ‐ IBM Insurance Application Architecture .......................................................................... B5TableTable 1 ‐ Mapping of DoD‐wide Reference Architecture Elements to DoDAF Models ............ 10i
DoD Reference Architecture Description1 IntroductionThe term “Reference Architecture”, within the Information Technology community, has variousmeanings, multiple purposes and uses, varying levels of detail and abstraction, and very littlecommon guidance. The Deputy Assistant Secretary of Defense (DASD) for InformationManagement, Integration and Technology (IMI&T)/DoD Deputy CIO requested a position onand strategy for Reference Architecture in the Department. The Reference ArchitectureDescription document is in response to this request. The objective is to provide useful guidanceand direction on the development and use of Reference Architecture as a tool to guide andconstrain architecture and solution development.1.1 PurposeThis document provides guidance for the development and use of Reference Architecture inthe form of a DoD definition for Reference Architecture and a description for DoD‐wideReference Architecture. The definition is applicable to all DoD Reference Architectures, whilethe description focuses on a unique set of DoD Reference Architectures that provide guidanceto the entire Department, hereafter referred to as DoD‐wide Reference Architectures. Thisdescription establishes standard criteria for DoD‐wide Reference Architectures. ReferenceArchitectures developed by Components for their specific purposes and uses are notconstrained by the description of DoD‐wide Reference Architecture in this document.1.2 BackgroundReference Architectures have been used in DoD, other Federal Agencies, and Industry toprovide information, guidance, and direction for focused subject areas. These ReferenceArchitectures have wide‐ranging purposes, uses, levels of detail, and levels of abstraction. Theterm itself has multiple definitions and meanings and seems to be relative to the context of theenvironment in which it is used. A Google search for Reference Architecture returned more than705,000 results.Reference Architecture literature can be found throughout DoD, other Federal Agencies, andIndustry addressing various subject areas. Due to current interests in Service OrientedArchitecture (SOA), a good amount of existing Reference Architecture literature is focused onthis area. Most notable are the efforts by the Organization for the Advancement of StructuredInformation Standards (OASIS), The Open Group Architecture Forum (TOGAF), and the ObjectManagement Group (OMG).As information, services, and infrastructure requirements and solutions continue to evolve, theneed for Reference Architecture increases. Reference Architecture serves as a tool forproviding common information, guidance, and direction to guide and constrain architectureand solutions. A DoD definition is needed to establish this broader perspective of ReferenceArchitecture as the common position across the Department. While Reference Architectureswith varying purposes, uses, and content exist at many levels throughout the Department, andwill continue to do so, a standard set of criteria needs to be established for DoD‐wideReference Architecture. A standard set of criteria for DoD‐wide Reference Architecture enablesconsistent development, use and assessment of these architectures. It also establishes acommon DoD expectation of the content provided by a DoD‐wide Reference Architecture. Thisdocument focuses on describing the standard criteria.1.3 ApproachThe approach for developing this document involved three steps:1
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