[cc-community] for those who want "free only" buttons
Mike Linksvayer
ml at creativecommons.org
Wed Feb 14 18:32:43 EST 2007
On Wed, 2007-02-14 at 07:20 -0500, drew Roberts wrote:
> On Wednesday 14 February 2007 12:20 am, Mike Linksvayer wrote:
> > So the current best practice (and usable by Google, Yahoo!, MozCC) is to
> > annotate the visible link with rel="license" (denoting a licensing
> > relationship; we don't just happen to be linking to a URL that happens
> > to be a license), which you can think of as the rel-license microformat
> > or producing a "<> :license <license uri> ." triple if you prefer RDF.
>
> Mike, could you give a little clear write up on what current best practice is?
> I have read the recent relevant posts but think I must not have understood.
>
> How dod the search engines identify licensed content? By links back to the CC
> license pages?
More or less, qualified with rel="license"
> So if a site is licensed BY-SA and points to BY-NC songs, and a person
> searches for BY-SA music, wil the engines return this page as a result? I run
> into issues like that often.
Yes, this is a problem with inexact metadata and using search engines
that index at the level of web pages only.
On the metadata front, metadata for an object (e.g., mp3) that is not a
web page can be specified with RDFa -- see
http://wiki.creativecommons.org/RDFa and for an example, view source on
http://ccmixter.org/media/view/media/remix/latest or view the page with
Songbird with MozCC installed. There's also a possibility that someday
a "media microformat" will be defined which includes support for
licensing, see http://microformats.org/wiki/licensing for some high
level discussion, most of which is not actually microformat-specific.
License info for specific objects may also be conveyed in feeds, see
http://wiki.creativecommons.org/Syndication
Buf for search to work in the way that you want there needs to be a
consumer for any of these methods of annotation. AFAIK http://owlmm.com
is the only one so far (importing music to be searched via feeds). I'm
reasonably confident things will get much better in this vein this year.
The other searches available via http://search.creativecommons.org and
documented at http://wiki.creativecommons.org/CcSearch_implementations
are doing web page or internal database searches.
--
http://wiki.creativecommons.org/User:Mike_Linksvayer
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