On 24/04/11 19:15, Andy Seaborne wrote:
On 24/04/11 05:05, Monika Solanki wrote:
PREFIX dc:<http://purl.org/dc/terms/>
PREFIX void:<http://rdfs.org/ns/void#>
SELECT DISTINCT *
from<http://xmlns.com/foaf/0.1/> # bogus, not used
WHERE {
SERVICE<http://void.rkbexplorer.com/sparql>
{
?dataset a void:Dataset.
?dataset dc:title ?title.
}
SERVICE<http://semantic.ckan.net/snorql>
{
?dataset a void:Dataset.
?dataset dc:title ?title.
}
}
The endpoint isn't /snorql, it's /sparql.
Sorry - correction --it's "/sparql/" -- the trailing slash is necessary.
It will be very, very slow (I got some timeouts), but that's the nature
of the query I'm afraid because it's a join across the sources (did you
mean UNION to concatenate the results?). ARQ isn't particular clever
but then it does not know the relative sizes of the results from the
services.
Andy
PS log has a lot of
FORM
<https://docs.google.com/uc?id=0B2a_FqNAY1tsODhiNDFkYzktYTEyMC00ODU1LWEyNjEtMzI3OTUxMzExZjFh>
so the server may be under load currently.
There's a lot of javascript at http://semantic.ckan.net/snorql -- the
top of snorql.js has "this._endpoint = '/sparql/';" and this is used in
this.submitQuery
document.getElementById('queryform').action = this._endpoint;
Andy
