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The RSS Modules

RSS consists of three basic or core modules as well as the module extension mechanism just described. For the most part, the three core modules will fit most data needs. However, specialized business data and/or processing may require new elements.

Core: Syndication, Content, and Dublin Core

The Syndication module provides information, such as the update frequency of the data, for tool builders. Rather than an RSS aggregator having to test a data source at set time periods, it can access the Syndication data and update only when the data is scheduled to change.

Table 13-1 contains the Syndication elements. The namespace for Syndication is xmlns:sy="http://purl.org/rss/1.0/modules/syndication/". The elements are subelements of the channel element, which means they apply to the data in the RSS document as a whole, rather than individual items.


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