Hoi,
It is indeed better to look up Wikipedia identifiers on demand. The
wikipedia articles associated with a Wikidata identifiers are a legacy.
Regularly Wikipedia articles are associated with different identifiers when
it is found that there is a mismatch between the different Wikipedia
article.. A good example; rose for the flower and rose for the plant..
Thanks,
GerardM
On 24 April 2017 at 16:51, Nicholas Humfrey <nicholas.humf...@bbc.co.uk>
wrote:
> Hi,
>
> A number of years ago I was having some very frustrating times with the
> identifier instability in dbpedia. Two people looking up an identifier for
> the same concept at different times ended up with different identifiers.
>
> So I created a proof of concept, dbpedialite, which uses Wikipedia PageIDs:
> http://www.dbpedialite.org/things/87851
> (At the time there was a page title edit war between Stoat and Ermine)
>
>
> But now we have Wikidata – which solves this problem much better – so I
> should really get on and decommission dbpedialite.
>
> What are you using Wikipedia Page IDs for? Might it be better to store
> the Wikidata ID and then lookup the Wikipedia page on demand?
>
>
> nick.
>
>
>
> From: Wikidata <wikidata-boun...@lists.wikimedia.org> on behalf of
> Gintautas Sulskus <gintautas.suls...@gmail.com>
> Reply-To: "Discussion list for the Wikidata project." <
> wikidata@lists.wikimedia.org>
> Date: Monday, 24 April 2017 at 15:37
> To: "Discussion list for the Wikidata project." <
> wikidata@lists.wikimedia.org>
> Subject: Re: [Wikidata] Wiki PageID
>
> Fantastic answers Daniel and Jane! All is crystal clear now.
>
> Thank you very much!
>
> Best,
> Gin
>
> On Mon, Apr 24, 2017 at 2:21 PM, Jane Darnell <jane...@gmail.com> wrote:
>
>> Though I agree Daniel with what you wrote about redirects, we do have a
>> policy (I believe I have read this somewhere) that if you create a redirect
>> in the case of two items about the same thing, then it should always be the
>> older item number that survives (and the merge gadget is supposed to check
>> for this). Maybe that's too much detail information though. So for the
>> given example "Moon" was created first and thus it is "Moon" id that should
>> survive, whether or not the label is set to "The Moon" later.
>>
>> <quote>
>>
>> Yes, page IDs survive renaming/moving the page.
>>
>> > 2. What if we have page "Moon" with ID=1. Someone creates a second-page
>> > "The_Moon" with ID=2. Is it possible that page "Moon" is transformed
>> into a
>> > redirect? Then, "Moon" would be redirecting to page "The_Moon"?
>>
>> Yes, pages can become redirects.
>> </quote>
>>
>> On Mon, Apr 24, 2017 at 2:04 PM, Daniel Kinzler <
>> daniel.kinz...@wikimedia.de> wrote:
>>
>>> Hello Gintautas!
>>>
>>> Am 21.04.2017 um 17:58 schrieb Gintautas Sulskus:
>>> > I have a couple of questions regarding the Wiki Page ID. Does it
>>> always stay
>>> > unique for the page, where the page itself is just a placeholder for
>>> any kind of
>>> > information that might change over time?
>>>
>>> That is indeed the idea. COntent changes, the page ID stays the same. If
>>> you
>>> need to identify a specific state of the page, use the revision ID (aka
>>> permalink).
>>>
>>> Note however that page IDs are considered "internal" identifiers. They
>>> are
>>> stable, but they are not the canonical way to access or identify a page.
>>> Use the
>>> title for that - or, in the context of Wikidata, use the entity ID.
>>>
>>> > Consider the following cases:
>>> > 1. The first time someone creates page "Moon" it is assigned ID=1. If
>>> at some
>>> > point the page is renamed to "The_Moon", the ID=1 remains intact. Is
>>> this correct?
>>>
>>> Yes, page IDs survive renaming/moving the page.
>>>
>>> > 2. What if we have page "Moon" with ID=1. Someone creates a second-page
>>> > "The_Moon" with ID=2. Is it possible that page "Moon" is transformed
>>> into a
>>> > redirect? Then, "Moon" would be redirecting to page "The_Moon"?
>>>
>>> Yes, pages can become redirects.
>>>
>>> > 3. Is it possible for page "Moon" to become a category "Category:Moon"
>>> with the
>>> > same ID=1?
>>>
>>> Yes, pages can be moved into the category namespace.
>>>
>>> --
>>> Daniel Kinzler
>>> Principal Platform Engineer
>>>
>>> Wikimedia Deutschland
>>> Gesellschaft zur Förderung Freien Wissens e.V.
>>>
>>> _______________________________________________
>>> Wikidata mailing list
>>> Wikidata@lists.wikimedia.org
>>> https://lists.wikimedia.org/mailman/listinfo/wikidata
>>>
>>
>>
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