OWL Processing – SANSA-Stack

3. How can I print loaded OWL axioms?

Spark
Flink

1

data.collect().foreach(println)
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dataSet.print()

2. How can I retrieve all axioms of type XYZ?

Spark

- E.g. OWLSubClassOfAxiom:
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2
3
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rdd.filter(axiom => axiom match {
      case a: OWLSubClassOfAxiom => true
      case _ => false
    })

1. How can I load an OWL file in format XYZ?

Spark
Flink

- Functional syntax
RDD

1

FunctionalSyntaxOWLAxiomsRDDBuilder.build(sc, "path/to/functional/syntax/file.owl")

Dataset

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FunctionalSyntaxOWLAxiomsDatasetBuilder.build(spark, "path/to/functional/syntax/file.owl")
- Manchester syntax
RDD

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ManchesterSyntaxOWLAxiomsRDDBuilder.build(sc, "path/to/manchester/syntax/file.owl")

Dataset

1

ManchesterSyntaxOWLAxiomsDatasetBuilder.build(sc, "path/to/manchester/syntax/file.owl")

Full example code: https://github.com/SANSA-Stack/SANSA-Examples/tree/master/sansa-examples-spark/src/main/scala/net/sansa_stack/examples/spark/owl
- Functional syntax
1

FunctionalSyntaxOWLAxiomsDataSetBuilder.build(env, "path/to/functional/syntax/file.owl")
- Manchester syntax
1

ManchesterSyntaxOWLAxiomsDataSetBuilder.build(env, "path/to/manchester/syntax/file.owl")

Full example code: https://github.com/SANSA-Stack/SANSA-Examples/blob/master/sansa-examples-flink/src/main/scala/net/sansa_stack/examples/flink/owl/OWLReaderDataSet.scala