Wikidata as it is does have no support for "Classes".
In the future, there will be Wikidata Queries.
A Wikidata Query is similar to a class description in OWL.
There is no need to create an item "Douglas Adams Novels". You can,
though, have a Query "Douglas Adams Novels", and change its label, etc.
Wikidata Queries will also have labels, an ID, etc.
Does this make sense?
On Thu Mar 06 2014 at 11:33:36 AM, Thomas Douillard <
thomas.douillard(a)gmail.com> wrote:
Hi Lydia, in languages such as OWL, a class of
item can be defined by a
predicate on the properties and values of the item. Will we be able to link
a class Qitem to a Wikidata complex query in the corresponding namespace ?
For example if we define a class "Douglas Adams Novels" whose instances are
the members of the example query you gave ?
2014-03-06 19:24 GMT+01:00 Lydia Pintscher <lydia.pintscher(a)wikimedia.de
:
On Tue, Mar 4, 2014 at 9:01 PM, David Cuenca <dacuetu(a)gmail.com> wrote:
> I would like to make you aware of this RFC
started by Gerard:
>
https://www.wikidata.org/wiki/Wikidata:Requests_for_comment/Define_lists_on…
>
> It is interesting because in the end, what is the difference between
a list,
> a category, and a query? Not much, really.
>
> I'm curious to know if the approach taken with queries will be the
same as
> the WDQ
>
http://tools.wmflabs.org/reasonator/?&q=6573995
>
> Items like "List of..." or "Category:" would have some use, but
the
> development notes don't state if this is the intended path
>
https://meta.wikimedia.org/wiki/Wikidata/Development/Queries
>
> Any thoughts about it?
I've been trying to understand the RfC 3 times now and still fail. So
I can't answer your questions unfortunately.
The short and simplified version of how complex queries will work:
* someone defines a query on a page in a special query namespace (eg
"everything that has author = Douglas Adams")
* the result of the query is a list of items matching the query
* the Wikipedias can include the result of the query and visualize it
in certain ways on a page. (eg the wikitext of the article "List of
works by Douglas Adams" would have a call to include the query result
from Wikidata)
Cheers
Lydia
--
Lydia Pintscher -
http://about.me/lydia.pintscher
Product Manager for Wikidata
Wikimedia Deutschland e.V.
Tempelhofer Ufer 23-24
10963 Berlin
www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg
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