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Re: Knowledge graph toolkit

From: Gregory Williams <greg@evilfunhouse.com>
Date: Sun, 3 May 2020 18:24:19 -0700
Message-Id: <4EC3C601-FFFD-4490-B784-61B9E6FBEBFE@evilfunhouse.com>
Cc: Adrian Gschwend <ml-ktk@netlabs.org>, semantic-web@w3.org
To: Pedro Szekely <szekely@usc.edu>


> On May 3, 2020, at 6:20 PM, Pedro Szekely <szekely@usc.edu> wrote:
> 
> This is a great discussion. The fact that the following query times out in Wikidata is a problem that makes folks skeptical that triple stores are for real:
> 
> #Count scholarly articles
> SELECT (COUNT(?article) AS ?article_count)
> WHERE 
> {
>   ?article wdt:P31 wd:Q13442814.
> }

I wonder if that’s an oddity/bug in the wikidata query planner, as the equivalent “COUNT(*)” query returns results immediately.

.greg
Received on Monday, 4 May 2020 01:24:35 UTC

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