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Introduction to
Service-Orientation
    Services (Part I)
    Services (Part II)
    The Service-Orientation
Design Paradigm
    Origins and Influences of Service-Orientation (Part I)
    Origins and Influences of Service-Orientation (Part II)

Service-Orientation
Design Principles
    Standardized Service Contracts
    Service Loose Coupling
    Service Abstraction
    Service Reusability
    Service Autonomy
    Service Statelessness
    Service Discoverability
    Service Composability
    Service-Orientation and Interoperability

Effects of Service-Orientation on the Enterprise
    Service-Orientation and the Concept of "Application"
    Service-Orientation and the Concept of "Integration"
    The Service Composition

Service-Orientation
in the Real World
    Life Before
Service-Orientation (Part I)
    Life Before
Service-Orientation (Part II)
    The Need for
Service-Orientation (Part I)
    The Need for
Service-Orientation (Part II)
    Challenges Introduced by Service-Orientation (Part I)
    Challenges Introduced by Service-Orientation (Part II)
    Additional Considerations

Additional Resources
    SOA Sites
    SOA Book Series
    SOA Training & Certification
    Free SOA Principles Poster
    Notification


Service-Orientation Design Principles

Service Discoverability
Audio Podcast
The last four principles are discussed in the audio podcast Introduction to Service-Orientation Design Principles - Part 2


"Services are supplemented with communicative meta data by which they can be effectively discovered and interpreted."

For services to be positioned as IT assets with repeatable ROI they need to be easily identified and understood when opportunities for reuse present themselves. The service design therefore needs to take the “communications quality” of the service and its individual capabilities into account, regardless of whether a discovery mechanism (such as a service registry) is an immediate part of the environment.


Figure: The application of this design principle results in the improvement of a service's discoverability and interpretability as a result of increasing the communications quality of all published service meta information.

The application of this principle, as well as an explanation of how discoverability relates to interpretability and the overall service discovery process, are covered in Chapter 12: Service Discoverability (Interpretability and Communication).

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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