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Introduction
    Overview
    Service Inventory Blueprints
    Service-Oriented Analysis
    Service-Oriented Design

Service Models
    Service Layers
    Entity Services
    Task Services
    Utility Services

Delivery Processes
    Top Down vs. Bottom Up
    The Inventory Analysis
Cycle (Part I)
    The Inventory Analysis
Cycle (Part II)
    The Inventory Analysis
Cycle (Part III)
    Choosing a Delivery Strategy

The Service-Oriented
Analysis Process
    Process Overview
    Information Gathering Steps
    Service Modeling Process (Part I)
    Service Modeling Process (Part II)

Service-Oriented
Design Processes
    Process Overview
    Design Processes and
Service Models
    Design Processes and Service-Orientation

Additional Resources
    Web Sites
    Book Series
    Training
    Consulting


Service Models

Entity Services

In just about every enterprise, there will be business model documents that define the organization’s relevant business entities. Examples of business entities include customer, employee, invoice, and claim.

The entity service model represents a business-centric service that bases its functional boundary and context on one or more related business entities. It is considered a highly reusable service because it is agnostic to most parent business processes. As a result, a single entity service can be leveraged to automate multiple parent business processes.

Entity services are also known as entity-centric business services or business entity services.

The figure on the right shows an example of an entity service. Several of its capabilities are reminiscent of traditional CRUD (create, read, update, delete) methods.



















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)

Free Color Poster (see www.soaposters.com).
For more information about this book, visit
www.soabooks.com/psd/.
The Prentice Hall Service-Oriented Computing Series from Thomas Erl
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