Can you help me with this?

[Alberto Soki]

Hey guys.

Ontop is a Virtual Knowledge Graph system. It exposes the content of arbitrary relational databases as knowledge graphs.

 

1 - Can we consider this knowledge graph as an ontology?

 

2 - When I query a relational database using ontop protégé, am I making a semantic query? That is, is the result of this tutorial (https://ontop-vkg.org/tutorial/#requirements) a semantic query?

 

2.1 - Or do I have to establish metadata for the resources that are in the relational database? So that my search is entirely semantic.

Grateful.

[davide lanti]

Hi,

1. Yes, if your definition of ontology is the pair (TBox, ABox), as in Description Logics. Sometimes, only the OWL file alone (i.e., the TBox) is called "the ontology".

2. What is a "semantic query"? Did you read this somewhere?
2.1:  See 2.

Best, Davide.

[Alberto Soki]

Thanks for your feedback David.

[Alberto Soki]

Davide, I was referring to service discovery (REST or SOAP) semantically. I believe that the most common is the discovery of these services syntactically.

[davide lanti]

I am sorry, I am unfamiliar with those.

What you can do with Ontop is to answer SPARQL queries under the OWL 2 QL entailment regime, which is the standard W3C semantics for the service of query answering with respect to OWL 2 QL ontologies.

Best.

[Alberto Soki]

Ok Davide, thanks again for your feedback.