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
<Adrian.Bielefeldt(a)mailbox.tu-dresden.de> 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 | james(a)dydra.com |