Changing Default SPARQL ENDPOINT

Virtuoso Universal Server SQL Data Management
1

Hi,

I am trying to change the default SPARQL ENDPOINT in Virtuoso 8.2 but the command:

SQL> registry_set('sparql_endpoint_xsl','http://HOST:PORT/DAV/sparql_endpoint.xslt');

And restarting the server is not working there is some way to debug why is not working ?

Thanks.

2

The server is not working in what way, the Virtuoso server is failing to restart or the customisation made to the SPARQL Endpoint form page is preventing it from loading ?

I presume you are following the steps detailed in HOWTO: Modify Virtuoso default /sparql endpoint Form page using XSLT ?

3

Hi @hwilliams, I was following steps from HOWTO: Modify Virtuoso default /sparql endpoint Form page using XSLT ? I have this problem only on Virtuoso 8.2, I think maybe related to a Package installed because SPARQL page looks like below:

image
image1860×828 82 KB

Sorry for the delay.
Regards.

4

That SPARQL Form page is added by the Virtuoso Authentication Layer (VAL VAD) installation which you must have in place in the indicated Virtuoso 8.1 installation, and the HOWTO: Modify Virtuoso default /sparql endpoint Form page using XSLT document is only for the Virtuoso old and new default SPARQL ENDPOINT form page in the post. I am check internally how the VAL specific SPARQL Form page can be customised …

5

OK, thanks for the information ! Regards.

6

Hi @hwilliams,

I found VIRTUOSO not working proprely I think related to the fact that sparql_endpoint.xslt was present but for SPARQL VAL is not this file that must be mapped, on the log I found :

      00:00:16 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:01:13 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:01:13 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:01:15 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:01:17 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:01:56 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:02:53 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:02:53 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:02:56 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:02:57 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:03:36 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:04:33 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]
      00:04:33 Error mapping the XSL-T stylesheet http://xxx:8890/DAV/sparql_endpoint.xslt on http://localhost:8890/sparql/copy : [S1T00] [{CLI..: Client cancelled or disconnected]

I think, maybe, you can modify your code to prevent thi error. Still waiting if there is the possibility to customize SPARQL VAL page :slight_smile:

7

As said previously development are looking into how the VAL SPARQL Form page can be customised, and will notify you when an update is available …

8

Hi @hwilliams ,

please provide an update on the customization of the VAL SPARQL page. We are interested in proceeding with the customization and are willing to compensate OpenLink for the services.

Thanks Regards.

9

The latest VAL VAD has been fixed to enable its SPARQL endpoint Form page to be similarly customisable, as with the Default SPARQL endpoint Form Page can in the HOWTO: Modify Virtuoso default /sparql endpoint Form page using XSLT post.

10

Great thanks.

Regards.