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Problems with SPARQL on WWW4 server

From: Danny Ayers <danny.ayers@gmail.com>
Date: Sun, 20 Mar 2011 14:59:36 +0100
Message-ID: <AANLkTi=snXzmiRuWr3fEb-+X2fw=Xe8x3BVfqhnRKv1T@mail.gmail.com>
To: public-lod@w3.org
(Not sure which list is most appropriate - please advise)

I'm getting a lot of errors querying against:

http://www4.wiwiss.fu-berlin.de/factbook/sparql

while some queries work, e.g.

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT DISTINCT ?s WHERE {
?s rdfs:label ?label .
FILTER REGEX(?label, "libya", "i")
}

many others fail, e.g.

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT DISTINCT * WHERE {
<http://www4.wiwiss.fu-berlin.de/factbook/resource/Libya> ?p ?o
}

=>

...
<h2>HTTP ERROR: 500</h2><pre>rethrew:
de.fuberlin.wiwiss.d2rq.D2RQException: Table 'factbook.neighbors'
doesn't exist: SELECT DISTINCT `T0_neighbors`.`name_encoded` FROM
`bordercountries` AS `T0_bordercountries`, `neighbors` AS
`T0_neighbors`, `countries` AS `T0_countries` WHERE
`T0_bordercountries`.`Landboundaries_bordercountries_title` =
`T0_neighbors`.`Name` AND `T0_bordercountries`.`Name` =
`T0_countries`.`Name` AND `T0_countries`.`name_encoded` = 'Libya'
(E0)</pre>
<p>RequestURI=/sparql</p><p><i><small><a
href="http://jetty.mortbay.org/">Powered by Jetty://</a>
...

Cheers,
Danny.

-- 
http://danny.ayers.name
Received on Sunday, 20 March 2011 14:00:09 UTC

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