Re: how to mark up a photo on the web

Hi Ben,

It all looks very promising. :)

I only have small comments, but they are:

1. The third sample uses the same image URL as the first, which
confused me at first, because I thought you had duplicated a whole
load of triples before I realised. (The image gets two titles, two
attribution names, etc.)

2. Is dc:created not better than the more general dc:date?

Having said that, you could then get into a debate about whether
that's the date of creation of the JPEG or the actual photo, which
leads to...

3. It doesn't feel right to simply attach the longitude and latitude
to the URL of the image.

For a start, it's a JPEG, which has multiple simultaneous locations as
we each view it...or no location at all, depending on how you look at
it. But even if the URI represented the photograph rather than the
JPEG, it feels like there should be some bnode of some type or other,
onto which to dump the 'photo taken at' information, rather than
directly onto the URL.

(And perhaps that bnode would also hold the dc:created property, the
lens and shutter-speed information, and whatever else photographers
love to make note of. :))

I might be overcomplicating things, but this question of the photo and
the JPEG makes me wonder whether there is some 'derived from'
relationship that CC could create. That relationship would be
applicable to derivative works that are created from these JPEGs, as
well as this situations where the JPEG is 'derived from' the original

Just a thought...

(Oh, and happy birthday!)



On Fri, Feb 20, 2009 at 9:10 PM, Ben Adida <> wrote:
> Hi semweb and RDFa folks,
> Creative Commons is interested in providing guidance on how to mark up
> photos online in great detail, using RDFa. We've started, but I thought
> we'd check in with folks here to get some more eyes on the problem.
> Here's our first take:
> (Nathan, your dog is now famous. Next time, it will be my dog.)
> We're trying to mark up:
> - license and license attribution
> - title
> - description
> - creator
> - tags
> - geo
> - more?
> Are we using the vocabularies correctly? Are there other vocabularies we
> should consider for the advanced example?
> Thanks!
> -Ben
> PS: I'll take this opportunity to note what I still find awesome about
> RDF and RDFa: even an RDFa syntax expert can and should ask for help on
> vocabularies, as those are two very different realms of expertise.

Mark Birbeck, webBackplane

webBackplane is a trading name of Backplane Ltd. (company number
05972288, registered office: 2nd Floor, 69/85 Tabernacle Street,
London, EC2A 4RR)

Received on Friday, 20 February 2009 21:36:11 UTC