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-bounces@lists.wikimedia.org<mailto:wikidata-bounces@lists.wikimedia.org>>
on behalf of Gintautas Sulskus
<gintautas.sulskus@gmail.com<mailto:gintautas.sulskus@gmail.com>>
Reply-To: "Discussion list for the Wikidata project."
<wikidata@lists.wikimedia.org<mailto:wikidata@lists.wikimedia.org>>
Date: Monday, 24 April 2017 at 15:37
To: "Discussion list for the Wikidata project."
<wikidata@lists.wikimedia.org<mailto: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
<jane023@gmail.com<mailto:jane023@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.kinzler@wikimedia.de<mailto:daniel.kinzler@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<mailto:Wikidata@lists.wikimedia.org>
https://lists.wikimedia.org/mailman/listinfo/wikidata
_______________________________________________
Wikidata mailing list
Wikidata@lists.wikimedia.org<mailto:Wikidata@lists.wikimedia.org>
https://lists.wikimedia.org/mailman/listinfo/wikidata
----------------------------
http://www.bbc.co.uk
This e-mail (and any attachments) is confidential and may contain personal views which are
not the views of the BBC unless specifically stated.
If you have received it in error, please delete it from your system.
Do not use, copy or disclose the information in any way nor act in reliance on it and
notify the sender immediately.
Please note that the BBC monitors e-mails sent or received.
Further communication will signify your consent to this.
---------------------