This is an RDF extractor that processes documents to extract an RDF model about the document. The extractor is called when a document is added or updated in the document store.
RDF extractors must be registered using the service loader. Check the main/resources/META-INF/services for how this is done.
RDF extractors can be configured for each DB with the property "docs.default.rdf.extractors". This is a comma separated list of extractors that can consist of the following:
- A fully qualified class name of an RDF extractor registered via the service loader
- A simple class name of an RDF extractor registered via the service loader
- The string "tika" to enable the Apache Tika metadata extractor which reads embedded metadata
RDF extractors can be also be chosen for each put() request by
providing a sequence of extractor names to the appropriate version of
the put() method on a BitesConnection.
- Run
gradle clean jar - In build\libs there should now be a
docs-x.y.z.jar - Copy that jar into $STARDOG_EXT or somewhere such as
$STARDOG\server\dbmsthat is on your Stardog classpath - Restart your Stardog server
WordCountExtractorwill be available as an RDF extractor
See WordCountExtractorTest.java for an API usage example.