[Myexperiment-discuss] Errors in http://rdf.myexperiment.org/sparql

[Alan Williams]

Hello everybody,

A Taverna user has asked:

<quote>
It seems that the SPARQL engine changed or doesn't work.

My query is:

PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX mebase: <http://rdf.myexperiment.org/ontologies/base/>
PREFIX snarm: <http://rdf.myexperiment.org/ontologies/snarm/>
PREFIX sioc: <http://rdfs.org/sioc/ns#>
PREFIX mevd: <http://rdf.myexperiment.org/ontologies/viewings_downloads/>
SELECT distinct ?url ?title ?description ?author ?viewed ?downloaded
where {   ?workflow dcterms:type ?thetype .
?workflow dcterms:title ?title .
?workflow dcterms:description ?description .
?workflow mebase:has-policy ?policy .
?workflow mebase:content-url ?url .
?workflow sioc:has_owner ?author .
?workflow mevd:viewed ?viewed .
?workflow mevd:downloaded ?downloaded .
?policy snarm:has-access
<http://rdf.myexperiment.org/ontologies/specific/PublicDownload> .
FILTER (REGEX(?thetype,'taverna2beta'))
}

And it worked before.

Now when I paste it and click on "Submit Query", I get:

"ERROR: Could not determine type of query"

When I choose "XML Raw" I get "Transfering data..." and the page hangs

Have you changed anything? How should I adjust my query?

I found out that when I delete "distinct" it works OK, but don't know why

</quote>

Do you know why this happens?

Thanks in advance,

Alan (wearing the Taverna support hat)