Jake Barnes wrote:
> I have the sense that at least one goal of all this social search and
> tagging is to recreate what Amazon.com does for its products, where it
> mentions "People who bought this product also liked these items:". But
> with social search and tagging, I think the idea is to recreate what
> Amazon is doing in a way that is open and distributed. People have, so
> far, mostly been using the CATEGORY tag in RSS to indicates tags, but
> some feedback mechanism would be useful, perhaps a central directory
> service that could be pinged to register approval (perhaps the CLOUD
> tag could be used this way?).
>
> My first impulse was to start adding tags to RSS, my second impulse was
> to scrap RSS and make my own XML standard for personal use
> (www.autostratus.com) but my third impulse was the realization that
> other people must have realized all this a year ago or so. So there
> must be other XML schemes out there, gaining acceptance right now, that
> offer developers a richer vocabulary for describing the stuff on the
> web.
>
> Can someone point me towards whatever XML vocabularies they think might
> facilliatate social search and tagging better than RSS?

Well, I discovered the answer on my own. Apparently a site has been
launched to gather all data on possible RSS extensions:

http://rss-extensions.org/wiki/Main_Page