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Some sites have RDF site summary (RSS) http://purl.org/rss/1.0/spec. It has a quite regular and nice interface, and it's possible to get the information Gnus needs to keep groups updated.
The easiest way to get started with nnrss is to say something
like the following in the group buffer: B nnrss RET RET, then
subscribe groups.
The following nnrss variables can be altered:
nnrss-directory
nnrss stores its files. The default is
`~/News/rss/'.
The following code may be helpful, if you want to show the description in the summary buffer.
(add-to-list 'nnmail-extra-headers nnrss-description-field)
(setq gnus-summary-line-format "%U%R%z%I%(%[%4L: %-15,15f%]%) %s%uX\n")
(defun gnus-user-format-function-X (header)
(let ((descr
(assq nnrss-description-field (mail-header-extra header))))
(if descr (concat "\n\t" (cdr descr)) "")))
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The following code may be useful to open an nnrss url directly from the summary buffer.
(require 'browse-url)
(defun browse-nnrss-url( arg )
(interactive "p")
(let ((url (assq nnrss-url-field
(mail-header-extra
(gnus-data-header
(assq (gnus-summary-article-number)
gnus-newsgroup-data))))))
(if url
(progn
(browse-url (cdr url))
(gnus-summary-mark-as-read-forward 1))
(gnus-summary-scroll-up arg))))
(eval-after-load "gnus"
#'(define-key gnus-summary-mode-map
(kbd "<RET>") 'browse-nnrss-url))
(add-to-list 'nnmail-extra-headers nnrss-url-field)
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