Web hosts - Here the aggregator is subscribed to three feeds:
Here the aggregator is subscribed to three feeds: A, B, and C. The oldest item in each is number 1, the newest number 6. The aggregator is only looking at four items, which will have appeared in chronological order: 1, 2, 3, and 4. From the aggregator s point of view the oldest item of interest is Item 6 from Feed A and the newest is Item 6 from Feed B. The aggregator is in effect skimming off the most recent items from its subscribed feeds. Another benefit of the item-oriented model is that it makes it possible to create composite or so-called synthetic feeds. An online system can aggregate content from various different sources and then republished the combined material as a whole new feed. This makes it possible to create a multiauthor feed on a particular topic, or (as PubSub.com) build a feed dynamically from search results. In Figure 20-6, there is again an aggregator skimming off the most recent items from a number of feeds. The difference is that the aggregator here is building a composite feed from those items, which it publishes as an entirely separate feed, Feed D. Figure 20-6 Title Item 1 Date Content Title Item 2 Date Content Title Item 3 Date Content Title Item 4 Date Content Feed A Feed Metadata 1 2 3 4 5 6 Feed D Feed Metadata 1 2 3 4 5 6 Feed B Feed Metadata 1 2 3 4 5 6 Feed C Feed Metadata 1 2 3 4 5 6 Aggregator 249 Modeling Feed Data
In case you need affordable webhost to host your website, our recommendation is ecommerce web host services.