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Fundamental Design
Terminology and Concepts
    Introduction
    Design Characteristic
    Design Principle
    Design Paradigm
    Design Pattern
    Design Pattern Language
    Design Standard
    Best Practice

Elements of
Service-Oriented Computing
    Introduction
    Service-Oriented
Architecture (SOA)
    Services and
Service-Orientation
    Service Compositions
    Service Inventory
    A Conceptual View of
Service-Oriented Computing
    A Physical View of
Service-Oriented Computing

Goals and Benefits of
Service-Oriented Computing
    Introduction
    Increased Intrinsic Interoperability
    Increased Federation
    Increased Vendor Diversification Options
    Increased Business and Technology Domain Alignment
    Increased ROI
    Increased
Organizational Agility
    Reduced IT Burden

Service-Oriented Computing
in the Real World
    Services as Web Services
    About Web Services (Part I)
    About Web Services (Part II)
    Service Models and
Service Layers
    Service Inventory Blueprints
    Service-Oriented Analysis
    Service-Oriented Design

Additional Resources
    SOA Sites
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Goals and Benefits of Service-Oriented Computing

Increased Intrinsic Interoperability

Interoperability refers to the sharing of data. The more interoperable software programs are, the easier it is for them to exchange information. Software programs that are not interoperable need to be integrated. Therefore, integration can be seen as a process that enables interoperability.

A goal of service-orientation is to establish native interoperability within services in order to reduce the need for integration. In fact, integration as a concept begins to fade within service-oriented environments (as further explained on the Service-Orientation and the Concept of "Integration" page).


Figure: Services are designed to be intrinsically interoperable regardless of when and for which purpose they are delivered. In this example, the intrinsic interoperability of the Invoice and Timesheet services delivered by Project Teams A and B allow them to be combined into a new service composition by Project Team C.

Interoperability is specifically fostered through the consistent application of design principles and design standards. This establishes an environment wherein services produced by different projects at different times can be repeatedly assembled together into a variety of composition configurations to help automate a range of business tasks.

Intrinsic interoperability represents a fundamental goal of service-orientation that establishes a foundation for the realization of other strategic goals and benefits. Contract standardization, scalability, behavioral predictability, and reliability are just some of the design characteristics required to facilitate interoperability, all of which are addressed by the service-orientation principles documented at www.soaprinciples.com.

How specifically service-orientation design principles foster interoperability within services is explained in the Service-Orientation and Interoperability page.

This page contains excerpts from:

SOA: Principles of Service Design
by Thomas Erl

ISBN: 0132344823, Prentice Hall/PearsonPTR, Hardcover
240+ Full Color Illustrations, 573 pages

Download the free Color SOA Principles Poster at www.soaposters.com.
For more information about this book, visit
www.soabooks.com.
The Prentice Hall Service-Oriented Computing Series from Thomas Erl
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