16 MODELING INTEGRATION WITH BUSINESS DOMAINS
224 Ch. 11 Service-Oriented Business Integration Modeling
this integration mechanism. Domain D1 is the integration target: loan division domain. The
atomic services A1??”individual loan atomic service, A2??”small-business loan atomic service,
and A3??”enterprise loan atomic service are also a part of this integration activity because they are
contained in the composite service CO1??”loan processing composite service. Note the analysis
modeling symbol ???aggregated??? that denotes this aggregation activity.
Use the disintegration notation to express separation of services from their hosting domains.
This comes in handy when modifying an existing business integration scheme while preserving
integration history efforts. This decoupling activity typically takes place in thewake ofmodifications
to business and technological requirements, re-architecture and redesign initiatives, reorganizations,
market trends, or alterations to business strategies. Exhibit 11.17 illustrates a simple transition of the
fixed-income composite service from the customer support domain to the trading products domain.
A service can be also integrated with any domain level in a hierarchical layered formation.
This scenario is depicted in Exhibit 11.18, which has three domain layers, each of which corresponds
to its aligned services. The cluster CL1 is integrated with the business domain D3.
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