It looks like the page was deleted/restored thus giving it a new page ID. Originally when pages where deleted the page_id was not kept, which caused a new page_id to be issued when it was restored. This phenomenon has since been fixed, and should no longer happen.

On Sat, Dec 3, 2016 at 8:47 AM, Renato Stoffalette Joao <joao@l3s.de> wrote:

Hi all.

Firstly, apologies for eventual duplicates or posting the question in the wrong mailing list.

Secondly, could anybody kindly explain to me if some Wikipedia pages changed their IDs from the past ? Or if so point to me where this might be documented ?
I have Wikipedia pages-articles XML dumps from the years 2006 and 2008 and when I was parsing those dumps I ran across some situations
such as the following one. In the dumps from 2006 and 2008 I found that the South Africa page has the ID 68854, while in the most current Wikipedia pages-articles XML dump (i.e. 2016) the same article has the ID 17416221.
I am trying to match some Wiki pages by IDs across time, but the example above is not helping.

Much appreciated in advance for any help.

--
Renato Stoffalette Joao
- PhD Student -
L3S Research Center / Leibniz Uni.
15th Floor, Room:1519
Appelstraße 9a
30167 Hannover, Germany
+49.511.762-17759

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