Add support for loading data from SPARQL

[ktk]

I would like to be able to execute a SPARQL query to a SPARQL endpoint directly from RAWGraph.

I propose to add the ability to select SPARQL as source here:

Minimal features needed:

• Input field for SPARQL endpoint
• Input field for SPARQL query (ideally with SPARQL syntax highlighting enabled)
• Optional: A way to provide a user/pw for the SPARQL endpoint

We created the library d3-sparql, which returns a JSON object oriented at what d3-csv is doing. It is properly converting RDF literal data types to native JavaScript types. I think this would be a great starting point for implementing it.

We would be happy to help on that but I would need some pointers about where in the source code we would have to add that to get an idea of the complexity.

This is related to #189, which simply seems to pass a SPARQL query string.

[giorgiouboldi]

Thanks for opening the issue. In this phase we are planning further developments of the tool. Keep an eye on further updates.

[ktk]

Ok great, please let me know if we can contribute in any way.

[lklic]

Hello,

Any updates on when this will be integrated? I can't find any documentation in any of the recent releases.

Thanks!

[ktk]

@lklic it's WIP, we just had a call with the RAWgraphs team last week. First version should show up soon.