Explore the chains of properties and classes in a given graph of RDF?(It's another way of exploring the ontology.)

[candlecao]

(For instance, our MusicBrainz RDF sample.)

The chains of properties and classes in a given graph can be taken as a "primitive ontology" or an inherent schema. We can feed this as context to LLM to facilitate "natural language to SPARQL".

[candlecao]

I figured out a simple way. For example, you want to check the latent schema of the graph http://sample/musicbrainz/reconciled, just do this query:

SELECT DISTINCT ?classOfDomain ?property ?classOfRange
FROM <http://sample/musicbrainz/reconciled>
WHERE {
  ?subject a ?classOfDomain.
  ?subject ?property ?object .
  ?object a ?classOfRange.
}

[candlecao]

Also, knowing the chains will help us to ask more well-designed or complicated questions (just to ask questions with a more professional perspective) for LLM2SPARQL.

[candlecao]

I figured out a simple way. For example, you want to check the latent schema of the graph http://sample/musicbrainz/reconciled, just do this query:

SELECT DISTINCT ?classOfDomain ?property ?classOfRange
FROM <http://sample/musicbrainz/reconciled>
WHERE {
  ?subject a ?classOfDomain.
  ?subject ?property ?object .
  ?object a ?classOfRange.
}

--That is not perfect.
A better and more intact query could be:

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?classOfDomain ?property ?classOfRange
FROM <http://sample/musicbrainz/reconciled>
WHERE {
  {?subject a ?classOfDomain.
  ?subject ?property ?object1 .
  FILTER (?property != rdf:type)
  }
  union
  {?subject a ?classOfDomain.
  ?subject ?property ?object1 .
  ?object1 a ?classOfRange.}
}

[candlecao]

Then you can use prompt engineering to get an ontology.
I tried and made it; But when the schema is more sophisticated, it may be tough to use prompt.
So I may turn to other method in the future. See #86.