Module org.apache.jena.arq
Package org.apache.jena.system

Class RDFStar

java.lang.Object
org.apache.jena.system.RDFStar
public class RDFStar extends Object
Library for RDF-star translation to and from reification form. There is one reification for each unique quoted triple term. This is especially important when decoding.

  • Constructor Details

    • RDFStar

      public RDFStar()

  • Method Details

    • encodeAsRDF

      public static Graph encodeAsRDF(Graph graph)
      Returns a copy of the argument graph with any triple terms encoded as reification.

      See decodeFromRDF(Graph) for the reverse operation.

      See encodeAsRDFInPlace(Graph) decodeFromRDFInPlace(Graph) for operations that alters the argument graph in-place.

      Returns a new graph with triples involving triple terms replaced with reification.

    • encodeAsRDF

      public static void encodeAsRDF(Graph graph, StreamRDF dest)
      Copy to a StreamRDF, encoding RDF-star Triple terms by replacing them with RDF Reification.

    • decodeFromRDF

      public static Graph decodeFromRDF(Graph graph)
      Returns a copy of the argument graph with any reifications for triple terms translated to triple terms.

      See decodeFromRDF(Graph) for the reverse operation.

      See encodeAsRDFInPlace(Graph) decodeFromRDFInPlace(Graph) for operations that alters the argument graph in-place.

    • decodeFromRDF

      public static void decodeFromRDF(Graph graph, StreamRDF dest)
      Copy the argument graph to a StreamRDF, replacing reifications with for triple terms. Caution: this operation uses space proportional to the number of triple terms present.

    • encodeAsRDFInPlace

      public static Graph encodeAsRDFInPlace(Graph graph)
      Encode RDF-star Triple terms by replacing them with RDF Reification.

      Changes the argument graph in-place.

      See Also:

    • decodeFromRDFInPlace

      public static Graph decodeFromRDFInPlace(Graph graph)
      Replace reification encoding of RDF-star terms with RDF-star triples.

      This function assuming any reification use in the graph is for RDF-star terms.

    • reificationSubject

      public static Node reificationSubject(Node_Triple nodeTriple)
      Calculate a reification subject node for a Node_Triple This must be the same node (same by value) whenever called with a Node_Triple with the same s/p/o.