move DefaultRDFTermFactoryTest to the api module as it doesn't rely on

also, jacoco/coveralls doesn't currently recognise the test coverage if
it is run in the simple module
1 file changed
tree: 3dd52b859397cbcdf10d0f29ad7a49e640a45c41
  1. .gitignore
  2. .travis.yml
  6. api/
  7. pom.xml
  9. simple/
  10. src/

Commons RDF

Working repository for experimenting with idea of providing a common library for RDF 1.1 that could be implemented by the upcoming versions of the main Java toolkits (Jena 3.0 and Sesame 4.0) as well as wrappers for other JVM languages (Banana RDF and so on).

The main motivation behind this simple library is revise an historical incompatibility issue. This library does not pretend to be a generic api wrapping those libraries, but a set of interfaces for the RDF 1.1 concepts that can be used to expose common RDF-1.1 concepts using common Java interfaces. In the initial phase commons-rdf is focused on a subset of the core concepts defined by RDF-1.1 (IRI, Blank Node, Literal, Triple, and Graph). In particular, commons RDF aims to provide a type-safe, non-general API that covers RDF 1.1. In a future phase we may define interfaces for Datasets and Quads.


Build Status

Coverage Status

This library is still work in progress.

A draft diagram of the interfaces which may be included in Commons RDF are:

commons-rdf class diagram


Building has been tested with Apache Maven 3.2 and Java JDK 8.

$ mvn clean install
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] Commons RDF
[INFO] Commons RDF: API
[INFO] Commons RDF: Simple impl
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO] ------------------------------------------------------------------------
[INFO] Building Commons RDF 0.0.3-SNAPSHOT
[INFO] Installing /home/johndoe/src/commons-rdf/commons-rdf-api/target/commons-rdf-api-0.0.3-SNAPSHOT-javadoc.jar to /home/johndoe/.m2/repository/com/github/commons-rdf/commons-rdf-api/0.0.3-SNAPSHOT/commons-rdf-api-0.0.3-SNAPSHOT-javadoc.jar
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] Commons RDF ....................................... SUCCESS [  1.792 s]
[INFO] Commons RDF: API .................................. SUCCESS [  2.676 s]
[INFO] Commons RDF: Simple impl .......................... SUCCESS [  3.142 s]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.718 s
[INFO] Finished at: 2015-01-26T02:09:10+00:00
[INFO] Final Memory: 22M/309M
[INFO] ------------------------------------------------------------------------

To then use from your project, add to Maven (update <version> to match the Maven output):


Simple implementation

The commons-rdf-simple module contains a simple (if not naive) implementation of the Commons RDF API using in-memory POJO objects.

Note that although this module fully implements the commons-rdf API, it should not be considered a reference implementation. It is not thread-safe nor scalable, but may be useful for testing and simple usage (e.g. output from an independent RDF parser).

Projects including Apache Jena and OpenRDF Sesame aim to provide complete and scalable implementations of the Commons RDF API.


The abstract classes AbstractGraphTest and AbstractRDFTermFactoryTest can be realised as JUnit tests by implementations in order to verify that they pass the minimal requirements of this API.

In order for this to work, your project will need to depend on the tests classifier for the commons-rdf-api module, for example (for Maven):


The extensions of each Test class need to provide a RDFTermFactory that can create the corresponding implementations of a Graph, IRI, etc.

For an example, see SimpleGraphTest.


See for details on how to contribute. In short - raise a Github pull request.


Apache License, Version 2.0