According to the SPARQL reference, multiple FROM clauses should mean a
query over the merge of all specified datasets.
http://www.w3.org/TR/sparql11-query/#unnamedGraph
I used multiple graph in a query and a combination of filter and minus
operators in where clause in this way:
SELECT ?s
Hi Alex,
On 03-Dec-13 2:59 PM, Alex Bondo Andersen wrote:
Hi,
Some graphs I cannot drop from the isql-vt interface using sparql
DROP GRAPH http://extbi.cs.aau.dk/data/agriculture;, I get the
following error:
*** Error 22023: [Virtuoso Driver][Virtuoso Server]SPARUL_DROP()
failed: graph
Hi Ian,
Support for geospatial ploygons, linestrings, boxes etc is available in the the
open source develop/7 branch, which is soon to become the stable/7 release ...
in the next few days probably ...
Although note your format of your coordinates even for point is incorrect as
the coordinates
Hi Alex,
On 06-Dec-13 1:12 PM, Alex Bondo Andersen wrote:
Thank you for your reply.
I have also tried CLEAR GRAPH and DROP SILENT GRAPH (sorry for not
stating that before), none of these displays the error, yet the graph
is not dropped (when I go look at the graphs through conductor).
Also I
Hi Nicola,
Are you able to provide a test case to recreate this behaviour we can setup
locally ?
Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc. // http://www.openlinksw.com/
Weblog -- http://www.openlinksw.com/blogs/
LinkedIn --
Hi
It seems that it is not possible to use a R2RML mapping file to convert
data from an external relational database (PostgreSQL for example) in
Virtuoso Open Source edition
I this correct?
Is it possible to workaround this?
regards
Lorena
Hi Lorena,
The Virtuoso Virtual Database engine required for such virtualisation of
relational data is a commercial product feature only and not part of open
source:
http://virtuoso.openlinksw.com/features-comparison-matrix/
Best Regards
Hugh Williams
Professional Services
OpenLink
