Hi all,
I set up a vagrant environment to do some hacking on Wikibase, but the
wikidata role seems to create a client only? Is there a role for the server?
Cheers,
Denny
Hi all -
We've been using a locally installed wikidata stand-alone service
(https://www.mediawiki.org/wiki/Wikidata_query_service/User_Manual#Standalon…)
for several months now. Recently the service went down for a significant
amount of time, and when we ran runUpdate.sh -n wdq, instead of catching
up to real time as it usually does, the update process lagged, failing
even to keep parity with real time.
Example output from the log:
09:30:39.805 [main] INFO org.wikidata.query.rdf.tool.Update - Polled up
to 2016-10-24T23:01:05Z at (0.0, 0.0, 0.0) updates per second and
(271.8, 56.2, 18.8) milliseconds per second
This is normal when starting the update of course, but the system never
seems to find its feet, and continues to stumble and lag. Restarting
both the blazegraph process and the update process has no lasting effect.
From time to time, a message like this will appear:
INFO org.wikidata.query.rdf.tool.RdfRepository - HTTP request failed:
org.apache.http.NoHttpResponseException: wikidata.cb.ntent.com:9999
failed to respond, retrying in 2175 ms.
I have experienced this effect in the past, and had success replacing an
old journal which was the product of a long update process with a new
journal rebuilt from the latest dump. This strategy did not work. I
tried rebuilding with the latest git pull from origin and rebuilding the
journal, again with no effect.
This problem started about 3 days ago, and we're now polling up to a
point in time 18 hours earlier than real time.
I would appreciate any guidance.
Also: is this an appropriate list to write to with such problems? Are
there more appropriate places?
Thanks,
Eric Scott
Hi all!
This is an announcement for a breaking change to the Wikidata API, JSON and RDF
binding, to go live on 2016-11-15. It affects all clients that process quantity
values.
As Lydia explained in the mail she just sent to the Wikidata list, we have been
working on improving our handling of quantity values. In particular, we are
making upper- and lower bounds optional: When the uncertainty of a quantity
measurement is not explicitly known, we no longer require the bounds to somehow
be specified anyway, but allow them to be omitted.
This means that the upperBound and lowerBound fields of quantity values become
optional in all API input and output, as well as the JSON dumps and the RDF mapping.
Clients that import quantities should now omit the bounds if they do not have
explicit information on the uncertainty of a quantity value.
Clients that process quantity values must be prepared to process such values
without any upper and lower bound set.
That is, instead of this
"datavalue":{
"value":{
"amount":"+700",
"unit":"1",
"upperBound":"+710",
"lowerBound":"+690"
},
"type":"quantity"
},
clients may now also encounter this:
"datavalue":{
"value":{
"amount":"+700",
"unit":"1"
},
"type":"quantity"
},
The intended semantics is that the uncertainty is unspecified if not bounds are
present in the XML, JSON or RDF representation. If they are given, the
interpretation is as before.
For more information, see the JSON model documentation [1]. Note that quantity
bounds have been marked as optional in the documentation since August. The RDF
mapping spec [2] has been adjusted accordingly.
This change is scheduled for deployment on November 15.
Please let us know if you have any comments or objections.
-- daniel
[1] https://www.mediawiki.org/wiki/Wikibase/DataModel/JSON
[2] https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format#Quantity
Relevant tickets:
* <https://phabricator.wikimedia.org/T115269>
Relevant patches:
* <https://gerrit.wikimedia.org/r/#/c/302248>
*
<https://github.com/DataValues/Number/commit/2e126eee1c0067c6c0f35b4fae0388f…>
--
Daniel Kinzler
Senior Software Developer
Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.
Hi all -
We've been using a locally installed wikidata stand-alone service
(https://www.mediawiki.org/wiki/Wikidata_query_service/User_Manual#Standalon…)
for several months now. We're becoming increasingly plagued by
performance issues, and are wondering if one approach to the problem
might be to adopt the Blazegraph multi-GPU architecture
(https://www.blazegraph.com/product/gpu-accelerated/).
Could anyone provide guidance as to how much pain would be involved in
making such a transition?
Thanks,
Eric Scott
Hey folks,
we plan to drop the "wb-status" page prop as it's unused as far as we
can tell and of questionable value, see
https://phabricator.wikimedia.org/T146792
<https://phabricator.wikimedia.org/T146792>. This will affect you if you
use the action=query API to retrieve page props from entity pages or if
you use the page_props table (on tool labs for example), to retrieve
this page property.
Please let us know if and how you use this page prop, so that we can
find a solution for your use cases.
In case there are no issues with removing this, we will drop it in
December 2016 (or later).
Cheers,
Marius
Hello!
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We welcome all Wikimedia technical contributors, third party developers,
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Please feel free to forward this email to anyone who might be interested in
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Thanks,
Srishti
--
Srishti Sethi
ssethi(a)wikimedia.org
Hey folks,
we will soon change how Wikibase outputs data as Wikitext per default.
This might affect users of the "action=wbformatvalue" API that either
use "generate=text/x-wiki" or omit the "generate" parameter (Wikitext
output is the default for that API module). I briefly looked through our
API logs in order to see how many users will be affected by this and
found that no one uses this feature[0].
Please note that for our internal functionality (like the property
parser function, or the Lua functionality), we made sure that the output
wont change.
Only the output obtained via the wbformatvalue-API module might change!
Cheers,
Marius
[0]: https://phabricator.wikimedia.org/T147591
Hello All
Property filter does not seem to be working for me.
My code:
WikibaseDataFetcher wbdf = WikibaseDataFetcher.getWikidataDataFetcher();
wbdf.getFilter().setPropertyFilter(Collections.singleton(this.dataObjectFactory.getPropertyIdValue("P57",
"http://www.wikidata.org/entity")));
wbdf.getFilter().setPropertyFilter(Collections.singleton(PropertyIdValueImpl.create("P57",
"http://www.wikidata.org/entity")));
i am still receiving all statements. what am i missing ?
Thanks in advance
Assaf
Hi,
I have a question regarding the tags [1] added to the edit history of
Wikidata.
When I look at the contributions of a user at the wiki [2], I see the
comment of the edit (e.g. " (Created claim: country (P17): Denmark (Q35),
#petscan)") and a special tag that indicates that WiDaR-based software was
used to edit (e.g. (Tag: Widar [1.4]), reCh).
However, when I look up the contributions of the same user that I have
checked in the Wiki, this time via the API [3], I don't see the "Widar" tag
in the comment.
Is there a way to identify these special tags (programmatically) in the
edit history?
Cristina
[1] https://www.wikidata.org/wiki/Special:Tags
[2]
https://www.wikidata.org/w/index.php?limit=50&title=Special%3AContributions…
[3]
https://www.wikidata.org/w/api.php?action=query&list=usercontribs&ucuser=us…
--
Cristina Sarasua
Institute for Web Science and Technologies (WeST)
Universität Koblenz-Landau
Universitätsstraße 1
56070 Koblenz
Germany
e-mail: csarasua(a)uni-koblenz.de
phone: +49 261 287 2772
fax: +49 261 287 100 2772
web site: http://west.uni-koblenz.de
Tomorrow I plan to apply the following update to the Stable Interface Policy:
https://www.wikidata.org/wiki/Wikidata_talk:Stable_Interface_Policy#Propose…
Please comment there if you have any objections.
Thanks!
--
Daniel Kinzler
Senior Software Developer
Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.