Deep Integration of Applications
Portals offer the opportunity to integrate applications in a number of ways. In Chapter 2 we discussed the basic three-tier architecture of portals: the presentation layer, the application server layer, and the data services layer. The presentation layer, by default, integrates multiple applications with links to a variety of programs and services. The applications themselves do not share data and are integrated only in the sense that they are available from a single point. This is shallow integration. Deep integration, on the other hand, occurs at the application server or data services layers.
Deep integration at the application server layer tends to focus on data exchange services, often in an XML format. Web ...
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