Here is a query that I wanted to evaluate:
SELECT ?sub ?super WHERE {
?sub wdt:P279+ ?super .
}
Fine on QLever, fails immediately on Virtuoso, times out in Blazegraph.
It would be a good idea to collect wanted but difficult queries to help inform
the WDQS team when they finally replace Blazegraph. I have over 60 queries
that I ran during investigations of the Wikidata ontology. Some of them were
too tough for QLever and quite a few were pieces of the too-tough queries
that I then combined the results of.
peter
On 10/9/24 10:43, Kingsley Idehen via Wikidata wrote:
Denny and others,
Here’s my basic goto query for SPARQL.
|SELECT (SAMPLE(?s) as ?sample) (count(*) as ?count) ?o WHERE {?s a ?o} GROUP
BY ?o ORDER BY DESC (?count) LIMIT 20 |
SPARQL Results Links:
1.
Solution from Our Wikidata Endpoint
<https://wikidata.demo.openlinksw.com/sparql?default-graph-uri=http%3A%2F%2Fwww.wikidata.org%2F&query=SELECT+%28SAMPLE%28%3Fs%29+as+%3Fsample%29+%28count%28*%29+as+%3Fcount%29+%3Fo%0D%0AWHERE+%7B%3Fs+a+%3Fo%7D%0D%0AGROUP+BY+%3Fo%0D%0AORDER+BY+DESC+%28%3Fcount%29%0D%0ALIMIT+20&format=text%2Fx-html%2Btr&timeout=30000&signal_void=on>
2.
QLever’s Endpoint doesn’t handling this, assuming
https://qlever.cs.uni-freiburg.de/wikidata/sk8I2D is the correct one.
What am I missing here?
Kingsley
On 10/9/24 10:31 AM, Kingsley Idehen via Wikidata wrote:
HI Denny,
On 10/2/24 5:05 AM, Denny Vrandečić wrote:
The most promising show of "we are ready" for the Virtuoso Open Source
edition would be what QLever has been doing for a while: to provide a
public endpoint with the data loaded, and kept up to date using the public
edit stream. That would be an undeniably strong argument for "just use this!"
Aren't you aware of the public endpoints we've provided for years?
[1] https://wikidata.demo.openlinksw.com/sparql
[2] https://wikidata.demo.openlinksw.com/fct
That's VOS based.
Is there something that's missing etc?
Kingsley
On Thu, Sep 26, 2024 at 4:32 PM Samuel Klein <[email protected]> wrote:
An updated benchmark eval (or self-evals) for the top db candidates
seems called for :) we would all love to see it.
Ideally with a canonical hardware or vm spec that all can use...
I don't know if the QLever self-eval from the spring is the right place
to start, but I believe these
<https://ad-research.cs.uni-freiburg.de/benchmarks/wdqs-queries/> are
the ~300 queries they used for a Wikidata benchmark.
🌍🌏🌎🌑
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--
Regards,
Kingsley Idehen
Founder & CEO
OpenLink Software
Home Page:http://www.openlinksw.com
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--
Regards,
Kingsley Idehen
Founder & CEO
OpenLink Software
Home Page:http://www.openlinksw.com
Community Support:https://community.openlinksw.com
Weblogs (Blogs):
Company Blog:https://medium.com/openlink-software-blog
Virtuoso Blog:https://medium.com/virtuoso-blog
Data Access Drivers
Blog:https://medium.com/openlink-odbc-jdbc-ado-net-data-access-drivers
Personal Weblogs (Blogs):
Medium Blog:https://medium.com/@kidehen
Legacy Blogs:http://www.openlinksw.com/blog/~kidehen/
http://kidehen.blogspot.com
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