With RSS, you register your content with companies called aggregators. Each day the aggregator searches the registered websites for RSS documents, verifies the link, and displays information about the feed so clients can link to documents that interest them.
Subordinate to the element, which contains information about the channel (metadata) and its contents.
RSS documents use a self-describing and simple syntax. Note that the sample files may point to documents and services that no longer exist.
Here is a simple RSS document: The first line in the document - the XML declaration - defines the XML version and the character encoding used in the document.
In this case the document conforms to the XML 1.0 specification and uses the ISO-8859-1 (Latin-1/West European) character set.
The next line is the RSS declaration which identifies that this is an RSS document (in this case, RSS version 2.0). It's up to the creator of the RSS document, to establish the uniqueness of the string.