module RSS: Web__RSStypeversion =[ `rss2 ]
type 'a context 
module type Text =sig..end
module Description:sig..end
module Link:sig..end
module Title:sig..end
module Item:sig..end
At least one of <title> of <description> is required.
module Channel:sig..end
<title>, <link>, and <description> are required.
typerss_context =[ `rss ] context
val open_element : version -> (string -> int -> int -> unit) -> rss_context
val close_element : rss_context -> unit