SOA reinvigorates the quest for these virtues with the new elements added
by the Web.
The Web provides two key ingredients to the SOA story. First, there are new widely
adopted standards such as XML and BPEL (which uses XML as its dialect). Standardization
provides a common language at some levels of the application stack,
reducing the overhead required for translation between applications.
Second, the Web expanded the reach of IT, in the sense that the user community
breached the organizational walls that used to limit the scope of applications. When
you can get valued functionality from outside your own solution set, the benefits that
come from reuse and integration are correspondingly multiplied.
A Service-Oriented Architecture exposes applications, modules, and data as web services
??”essentially, an Application Program Interface (API) for logic and data access.
This interface can help standardize functionality and data access, which will help to
overcome some of the issues that have acted as roadblocks to reuse and integration
in the past.
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