[whatwg] Trying to work out the problems solved by RDFa
Charles McCathieNevile
chaals at opera.com
Sun Jan 4 16:04:54 PST 2009
On Mon, 05 Jan 2009 01:21:33 +1100, Henri Sivonen <hsivonen at iki.fi> wrote:
> On Jan 2, 2009, at 14:01, Benjamin Hawkes-Lewis wrote:
>> On 2/1/09 10:38, Henri Sivonen wrote:
>>> Is the problem in the case of recipes that the provider of the page
>>> navigation around the recipe is unwilling to license the navigation
>>> bits under the same license as the content proper?
>>
>> I thought Toby's example was that each recipe on the page needed a
>> different licence, rather than a distinction between the main content
>> area and the navigation.
>
> Oh. That can be solved by giving each recipe its own URI & HTML page and
> scraping those pages instead of summary pages that might contain
> multiple recipes.
Sure. In which case the problem becomes "doing mashups where data needs to
have different metadata associated is impossible", so the requirement is
"enable mashups to carry different metadata about bits of the content that
are from different sources.
A use case for this:
There are mapping organisations and data producers and people who take
photos, and each may place different policies. Being able to keep that
policy information helps people with further mashups avoiding violating a
policy.
For example, if GreatMaps.com has a public domain policy on their maps,
CoolFotos.org has a policy that you can use data other than images for
non-commercial purposes, and Johan Ichikawa has a photo there of my
brother's café, which he has licensed as "must pay money", then it would
be reasonable for me to copy the map and put it in a brochure for the
café, but not to copy the data and photo from CoolFotos. On the other
hand, if I am producing a non-commercial guide to cafés in Melbourne, I
can add the map and the location of the cafe photo, but not the photo
itself.
Another use case:
My wife wants to publish her papers online. She includes an abstract of
each one in a page, but because they are under different copyright rules,
she needs to clarify what the rules are. A harvester such as the Open
Access project can actually collect and index some of them with no
problem, but may not be allowed to index others. Meanwhile, a human finds
it more useful to see the abstracts on a page than have to guess from a
bunch of titles whether to look at each abstract.
cheers
Chaals
--
Charles McCathieNevile Opera Software, Standards Group
je parle français -- hablo español -- jeg lærer norsk
http://my.opera.com/chaals Try Opera: http://www.opera.com
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