Assembling Composite Views

Now that the Internet has had some time to evolve since it really started to roar in the mid-90s, familiar patterns of portal-style Web pages have emerged. Pages of developer sites, online financial services, news sites, and corporate and nonprofit sites typically contain a recognizable collection of headers, footers, main windows, page-context navigation bars, or a global top navigation bar of site-wide menu categories.

Each sub-page or sub-view represents areas of different rates of change with respect to monthly, weekly, or daily maintenance. Some sub-views might represent entirely different data sources. And each sub-view might be managed by a different set of individuals, policies, or data sources, depending on ...

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