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Jelly-JVM – getting started with Jena/RDF4J plugins

This guide explains how to use Jelly-JVM with Apache Jena or RDF4J as a plugin, without writing a single line of code. We provide plugin JARs that you can simply drop in the appropriate directory to get Jelly format support in your application.

Installation

Apache Jena, Apache Jena Fuseki

You can use Apache Jena or Apacha Jena Fuseki with Jelly's plugin JAR.

  • Download the plugin JAR: latest development version, or you can go to the releases page on GitHub to download a different version of the jelly-jena-plugin.jar file.
    • The plugin must be compatible with your Apache Jena version. Consult the compatibility table.
  • Place the file in your classpath:
    • For Apache Jena Fuseki, place it in the $FUSEKI_BASE/extra/ directory. $FUSEKI_BASE is the directory usually called run where you have files such as config.ttl and shiro.ini. You will most likely need to create the extra directory yourself.
    • For Apache Jena, place the file in the lib/ directory of your Jena installation.
    • For other applications, consult the manual of the application.
  • You can now use the Jelly format for parsing, serialization, and streaming serialization in your application!

Content negotiation in Fuseki

Content negotiation using the application/x-jelly-rdf media type in the Accept header works in Fuseki since Apache Jena version 5.2.0. Previous versions of Fuseki did not support media type registration.

How to use Jelly with Jena's CLI tools?

Jelly-JVM fully supports Apache Jena's command-line interface (CLI) utilities. See the dedicated guide for more information.

Eclipse RDF4J

  • Download the plugin JAR: latest development version, or you can go the the releases page on GitHub to download a specific version of the jelly-rdf4j-plugin.jar file.
  • Place the file in your classpath:
    • For the RDF4J SDK distribution, place the file in the lib/ directory of your RDF4J installation.
    • For other applications, consult the manual of your application for the exact location.
  • You can now use the Jelly format for parsing and serialization in your application!

Supported features

  • Full support for parsing and serialization of RDF data (triples and quads) in the Jelly format.
    • The parser will automatically detect if the input data is delimited or not. Both delimited and non-delimited Jelly data can be parsed.
    • In Apache Jena also the stream serialization API is supported (StreamRDF).
  • Recognizing the .jelly file extension.
  • Recognizing the application/x-jelly-rdf media type.

The Jelly format is registered under the name jelly in the RDF libraries, so you can use it in the same way as other formats like Turtle, RDF/XML, or JSON-LD.

See also