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A hypothetical business scenario, which uses RSS, is a website constantly polling RSS feeds for its "What's New" section. Whenever an RSS feed being monitored by the rssPoller is changed it rssPoller detects a change in one of the RSS feeds, rssPoller will send an updated list of url URLs to displayNewSites. The displayNewSites component will then auomatically update the website's "What's New" section accordingly.

The following diagram illustrates this:

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