Just ask WDQ for a list of item ids, then pass them to the live API
<https://www.wikidata.org/w/api.php?action=help&modules=wbgetentities>.
You may miss some recently edited items, but at least you wouldn't base
your edits upon outdated revisions (and wbeditentity
<https://www.wikidata.org/w/api.php?action=help&modules=wbeditentity>'s
"baserevid" argument completely eliminates the risk).
Il 19/06/2015 00:10, Andra Waagmeester ha scritto:
Indeed the ultimate truth source is on the wikidata site it self.
However, I am not aware of a way to query the Wikidata site for a list
of items fitting a certain condition (e.g. all Wikidata items
containing a claim with the NCBI Entrez Gene (P351) property.)
It is here that I need to rely on WDQ (and WDQS) and potentially risk
missing existing items due to delays in which WDQ (and WDAS) gets updated.
I would like to know if I could rely on a given time frame - being it
seconds, hours, days, or one week).
I currently assume a delay of a week, but I don't know how accurate
this assumption is.
Regards,
On Thu, Jun 18, 2015 at 10:23 PM, Stas Malyshev
<[email protected] <mailto:[email protected]>> wrote:
Hi!
> The way that updates work *in all systems* (polling small lists of
> recent changes at intervals and hoping that this leads to a complete
> change history), it seems quite possible that such systems will
> sometimes miss an update, at least in the long run and under varying
> conditions (high server load, network troubles, update script
down for a
> while, whatever). Insufficient update frequency is maybe not the
biggest
> problem here (it should be in the range of one to a few minutes
for all
> of the services).
Very important point with which I agree - it is completely
possible that
update polling misses an update, WDQS is no exception and it usually
does not treat it as a problem, as the next update can fill up the
missed one. However the ultimate truth source is on the wikidata site
only. Beware of the caches though - if you ask for the same data
on the
same URL twice, I think you can get the same result even if the
underlying data changed in the meantime.
--
Stas Malyshev
[email protected] <mailto:[email protected]>
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