[uf-discuss] rev'ing rel-directory

Chris Messina chris.messina at gmail.com
Sun Jul 30 15:39:16 PDT 2006

For this transclusion stuff, there are two promising projects that I
think we should all look at...

First is PopupPoliticians, which uses the rel-tag to pull up remote
information about politicians:


The second is a new and very excellent WordPress plugin that captures
onclick events to dynamically repopulate divs on a page:


These two things show the promise of getting remote content into a
page... either from the current domain or a remote one.

Being able to do something similar with group membership (i.e. I link
to someone else from a Group page and use something like
rev="directory" or rev="member" to identify that relationship and then
to pull in remote info about that member).

Anyway -- the rev stuff is certainly interesting... real
implementations would be pretty cool to see!


On 7/30/06, Danny Ayers <danny.ayers at gmail.com> wrote:
> I'm afraid I've missed discussions around rel-directory [1], but was
> prompted to take a look after stumbling over an OPML distributed
> directories tutorial [2], wondering how best to do this using
> microformats.
> OPML uses an attribute called "inclusion" to say that a remote
> hierarchical dir is a sub dir of the local element. It's a neat idea,
> essentially Gopher on top of HTTP+XML. But given the linking
> capablitities of HTML, the OPML is redundant, as long as there is a
> way of expressing "inclusion".
> rel-directory would appear to be in the frame for an alternative based
> on existing standards, only it's directed the opposite way :
> rel="directory"
>    indicates that the referenced resource is a directory which does or
> should contain the current page
> But HTML to the rescue, how about:
> rev="directory"
>    indicates that the current element is a directory element which
> contains the referenced resource
> Does that make sense?
> The most obvious application of this would be in XOXO documents, along
> the lines of the distributed dir idea.
> A potentially cool demo application might be to transclude [3] any
> remote page, stripped down to hierarchy+ labelled links. If this was
> done to one level of transclusion, and the links in the remote page
> rewritten to something like
> http://mydir.org/tree?remote=http://thatpage.com/stuff so they could
> be fed through the tree-browser, the demo could reveal the current web
> as a "World Outline". Anyone got a bit of Ajax time on their hands?
> Cheers,
> Danny.
> [1] http://microformats.org/wiki/rel-directory
> [2] http://hosting.opml.org/amyloo/osite/help/howtos/distdir.htm
> [3] http://en.wikipedia.org/wiki/Transclusion
> --
> http://dannyayers.com
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Chris Messina
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