April 21, 2007 7:01 AM
RDF Site Summary - simplified by RSS 2.0
The <channel> element in a RSS 1.0 document summarizes the information contained in the web resource; as the name implies RDF Site Summary. The RSS 1.0 version describes the web resources metadata in conformance with the RDF specifications. The <item> elements in RSS 1.0 document are the RDF web resources summarized by this channel.
The <items> sub-element within a <channel> element declares these RDF web resources in a Seq container. These web resource declarations are defined by <item> element, hence this element must include a rdf:about attribute to identify the web resource that was declared in the Seq.
RSS 1.0 & RSS 2.0 structures
RSS 2.0 feed is an XML document with single <channel> element. The RSS 2.0 specifications simplify the syntax; as the name implies Really Simple Syndication. The difference is that web resources are not declared within the <channel> element, rather the anchor text and anchor link of the information source, i.e. the <item> element are directly added within the <channel> element scope.
Namespaces can be added to RSS 2.0 document to extend the tag vocabulary. Also HTML formatting can be added to the <description> sub-element.
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