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Chapter 8. RSS 2.0 (Simply Extensible) > The Specification in Detail

8.1. The Specification in Detail

RSS 2.0 is basically RSS 0.92 with modules allowed and a handful of additional elements. There are also a small number of rule changes, but we will deal with the new elements first:


comments

An optional subelement of item that should contain the URL of the comments page for the item. This is primarily used with blogging.


generator

An optional subelement of channel that should contain a string indicating which program has been used to create the RSS file.


author

An optional subelement of item that should contain the email address of the author of the resource referred to within the item.


ttl

An optional subelement of channel that contains a number, which is the number of minutes the reader should wait before refreshing the feed from its source.


pubDate

An optional subelement of item that should contain the date the object referred to by the item was originally published. This date should be in the standard mandated by RFC 822—for example: Sat, 01 Jan 2002 0:00:01 GMT.


guid

An optional subelement of item that should contain a string that uniquely identifies the item. This element has the optional attribute isPermalink, which, if true, denotes that the value of the element can be taken as a URL to the object referred to by the item.


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