good evening;
go here :
http://www.sparql.org/query-validator.html
and try the query (with appropriate prefix declarations).
you will see that it is not valid.
> On 2017-01-14, at 18:23, Adrian Bielefeldt
> <[email protected]> wrote:
>
> Hello everyone,
>
> I'm writing on behalf of a Wikidata Research Project into
> SPARQL-Queries.
>
> I was wondering if anybody could help me understand why (and how) this query:
>
> SELECT DISTINCT ?item
> WHERE
> { ?tree0 wdt:P31 ?item . BIND (wd:Q146 AS ?tree0) }
>
> is being accepted by query.wikidata.org.
>
> The reason I'm asking is that we are trying to parse the queries from the
> wikidata logs and analyze them for different features. At the moment we are
> parsing them using OpenRDF, which fails (as far as I can see understandably)
> at parsing this query.
handling erroneous queries in such circumstances is one of the general framing
issues.
best regards, from berlin,
---
james anderson | [email protected] | http://dydra.com
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