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graph://inference

Applies RDFS inference rules to the RDFGraph in the exchange body, deriving new triples based on the existing data and an optional ontology schema. If an ontology is provided via chimeraResource, its class and property hierarchies drive the inference — for example, if the ontology defines ex:Employee rdfs:subClassOf ex:Person, then every instance of ex:Employee will also be inferred to be an instance of ex:Person. Without an ontology, basic RDFS inference still runs using the relationships already present in the graph data.

The result is a new InferenceRDFGraph that replaces the exchange body. All triples from the original graph are preserved; the inferred triples are added on top.

Parameters

Parameter Type Required Default Description
chimeraResource ChimeraResourceBean No — Ontology/schema resource whose class and property hierarchies are used for inference. See ChimeraResource.
allRules boolean No true When true, the full set of RDFS entailment rules is applied (including domain/range inference, which can significantly increase the number of inferred triples). When false, a more conservative subset is used, focusing on subclass and subproperty reasoning, which offers better performance.

Example

ChimeraResourceBean ontology = new ChimeraResourceBean(
    "file://./ontologies/schema.owl", "rdfxml");
getCamelContext().getRegistry().bind("ontology", ontology);

from("direct:inference")
    .to("graph://inference?chimeraResource=#bean:ontology&allRules=false");

- beans:
    - name: ontology
      type: com.cefriel.util.ChimeraResourceBean
      properties:
        url: "file://./ontologies/schema.owl"
        serializationFormat: "rdfxml"

- route:
    from: "direct:inference"
    steps:
      - to:
          uri: "graph://inference"
          parameters:
            chimeraResource: "#ontology"
            allRules: false