thanks for sharing! I've used the Item Quality Evaluator and it seems
very useful indeed. I like the fact that the lowest ranking items are
put on top, so they can get the TLC they deserve. Also, i didn't
realise that the full query editor was integrated in the SPARQL field,
a pleasant surprise! I also really like how in the source many parts
are split into Vue components, which will make reuse in other projects
I did notice a very large query (all paintings) timed out, but maybe
that is to be expected with such a large set.
On Tue, Apr 20, 2021 at 6:29 PM Mohammed Sadat Abdulai
This is to announce that over the past month we started to look at ways to help us all
get a better understanding of the quality of Wikidata's data in a specific area of
interest. For this purpose we worked on building two tools; an Item Quality Evaluator and
a Constraint Violation Checker - both of these tools are now available at:
Item Quality Evaluator
Constraint Violation Checker
Data quality on Wikidata has many aspects. The constraint violations and ORES quality
scores that these tools use are two helpful indicators of certain aspects of quality that
we hope will be helpful for you.
As you may know, Wikidata’s data quality is very unevenly distributed - some areas are
very well maintained and others not so much. We only currently provide ORES quality scores
on a global and per-Item level. This has two effects, however:
Editors taking care of a specific area of Wikidata want to improve that area but
currently don’t have an easy way to find the Items with the lowest quality they can focus
their time on in order to raise the quality of that area.
Re-user of Wikidata’s data are usually only interested in a subset of Wikidata’s Items
and by extension the quality of that subset. It is currently hard for them to know what
quality level they are getting for their subset of interest.
To address this issue we put together two small tools. The Item Quality Evaluator is a
simple website that provides ORES quality scores for a list of Items in Wikidata. The
Constraint Violation Checker is a small command-line script that retrieves the number of
constraint violations and ORES scores for a list of Items for further analysis.
How does the Item Quality Evaluator tool work?
You provide it with a list of Item IDs or a SPARQL query and then it'll get the ORES
score for each of them as well as the average score over all the Items you
provided in a nice webpage. This way, you can more easily identify the Items in an area
you are interested in that have the lowest quality and improve them.
How does the Constraint Violation Checker script work?
When you run it, it outputs a CSV file with the number of statements, the number of
constraint violations for each severity level, the number of sitelinks to all projects and
to Wikipedia and the ORES score for each of those Items.
Why didn't we integrate the constraint violations data into the Item Quality
We want to do that in the long-term but right now it is not possible because the
constraint violation data is not easily accessible and retrieving it takes several hours
to run for a large list of items.
Please try these tools and let us know if you encounter any issues. If you want to
provide general feedback, feel free to let us know.
Community Communications Manager for Wikidata/Wikibase
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