OASIS SOA Reference Model TC SOA Adoption Blueprints

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OASISSOA Reference Model TCSOA Adoption
Blueprints

• Matthew J. Dovey
• Oxford University

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Reference Model

• A set of clearly defined basic concepts, axioms
  and relationships within a particular problem
  domain, independent of specific implementations,
  conventions, activities or organisations.
• SOA-RM define the essence of the service
  oriented achitecture paradigm

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SOA-RM

• Service
• Mechanism to enable access to a set of
  capabilities invoked through a service interface
• Service Description
• Information needed to use a service
• Consumer must know
• Service exists and is available
• Service functionality
• Constraints and policies
• Service interface information model

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SOA-RM

• Key concepts for interaction
• Information model
• Structure (character encoding, XML, SOAP etc.)
  syntax
• Ontology (message interpretation) semantics
• Behavioural model
• Process (single exchanges, longer term
  transactions)
• Behaviour (closely connected to real world
  effect)
• Context
• Actual services (as oppose to potential) run
  within an execution context which detemines
  various attributes (e.g. security)

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SOA-RM

• Policies and Expectations
• Policy obligations, constraints and other
  conditions of use
• Expectations the purpose of the service, its
  real world effect
• Contract agreements/contracts between
  participants (e.g. QoS, commercial agreements)
• Service discoverability
• Key but defined by specific SOA reference
  architectures and implementations

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SOA-RM Conformance

• Has entities which can be identified as services
  (as defined by SOA)
• Such entities have descriptions
• Such entities have identifiable interaction
  models (information models, temporaral behaviour)
• Can identify a means for consumers and providers
  can engage
• Identifiable aspects of service entities
  corresponding to conditions of use and
  expectations that result from using the services

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Above the SOA-RM

• SOA-RM refers to
• SOA Reference Architectures
• SOA Implementations
• OASIS SOA Adoption Blueprints TC
• To develop, circulate, maintain and update a set
  of example business profiles or "adoption
  blueprints" to illustrate the practical
  deployment of services using SOA methods.
• Each adoption blueprint will provide (on a
  vendor- and specification-neutral basis)
• a business problem statement
• a set of business requirements
• a normative set of functions to be fulfilled