Multiple reasoning schemas

[Dalmir da Silva]

Hi all,

Stardog has a concept of running a SPARQL query in a predefined set of named graphs. It's called reasoning schema: https://docs.stardog.com/inference-engine/#reasoning-with-multiple-schemas

Is it something feasible with Ontop? I mean, defining named graphs and then telling Ontop which subset of graphs I want my query to be targeted for resolution?

Thanks,

[Guohui Xiao]

Hi,

Indeed, Ontop supports named graphs.

For the syntax of such mapping, have a look at:

https://github.com/ontop/ontop/blob/version4/client/cli/src/test/resources/test/simplemapping_named.obda

Then, in SPARQL queries, you can use the GRAPH keyword. Note that, we don't support FROM [NAMED] in SPARQL yet.

Best,

Guohui

[Dalmir da Silva]

Thanks Guohui Xiao,

All the best!

[mart...@atomgraph.com]

Hey,

Sorry for reviving an old thread, but could you please add the GRAPH mapping syntax to the tutorial? I couldn't find it in the documentation.

Martynas

[Benjamin Cogrel]

Hi Martynas,

Indeed, we still need to add a page about the OBDA syntax to the documentation. 

Here is the issue tracking it: https://github.com/ontop/ontop-website/issues/7

Best,

Benjamin

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