This should be set as renderer for url's ending in .rss or .atom, with a node ID as query parameter. The node should be handled by a module giving the method get_feed_and_entries_info, returning a list of hashes with info for the feed, the first hash containing the feed info. See XML::Feed for field names.
<FilesMatch ".atom$|.rss$|^feed$"> SetHandler perl-script PerlSetVar renderer RDF::Base::Renderer::Feed PerlSetVar loadpage no </FilesMatch>