3. RSS 1.0
The RSS 1.0 specification is at http://web.resource.org/rss/1.0/spec
The description element (of an item) is described
as (#PCDATA). Consequently, there is no
explicit provision for including HTML markup in a newsfeed.
Extensions to RSS 1.0 is done through the use of modules. Here is a link to a page containing a list of proposed modules. One such module is the module for events.
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