Reasoner for the description logic EL+.
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
docs
jcel-core
jcel-coreontology
jcel-distribution
jcel-library
jcel-ontology
jcel-owlapi
jcel-plugin
jcel-protege
jcel-reasoner
jcel-standalone
update-info/protege-5
.gitignore
.scrutinizer.yml
.travis.yml
COPYING-LESSER.txt
COPYING.txt
LICENSE.txt
README.md
RELEASE-NOTES.md
_config.yml
pom.xml

README.md

jcel

build maven central scrutinizer license license download follow

jcel is a reasoner for the description logic EL+. It uses the OWL API and can be used as a plug-in for Protege.

Download

<dependency>
  <groupId>de.tu-dresden.inf.lat.jcel</groupId>
  <artifactId>jcel-owlapi</artifactId>
  <version>0.24.1</version>
</dependency>

Author

Julian Mendez

Licenses

Apache 2.0, LGPL 3.0

Main features

Suggested technologies

Source code

The project is hosted on GitHub. To checkout and compile the project with Apache Maven:

$ git clone https://github.com/julianmendez/jcel.git
$ cd jcel
$ mvn clean install

The library, its sources and its Javadoc will be in jcel-library/target, the plug-in will be in jcel-plugin/target, the standalone will be in jcel-standalone/target, and the release ZIP file will be in target.

To compile the project offline, first download the dependencies:

$ mvn dependency:go-offline

and once offline, use:

$ mvn --offline clean install

The bundles uploaded to Sonatype are created with:

$ mvn clean install -DperformRelease=true

and then on each module:

$ cd target
$ jar -cf bundle.jar jcel-*

and on the main directory:

$ cd target
$ jar -cf bundle.jar jcel-parent-*

The version number is updated with:

$ mvn versions:set -DnewVersion=NEW_VERSION

where NEW_VERSION is the new version. The file VersionInfo.java is updated manually.

Architecture

Modules

The version under development has the following modules:

  • jcel-coreontology : set of normalized axioms
  • jcel-core : classification algorithms using only normalized axioms
  • jcel-ontology : set of all possible axioms and a procedure to normalize them
  • jcel-reasoner : reasoner that can classify an ontology and can compute entailment
  • jcel-owlapi : OWL API interface, performs the translation between the OWL API axioms and jcel axioms
  • jcel-protege : module to connect to Protégé

It also has the following module used to build the release:

  • jcel-library : module to create the library, its sources and its javadoc
  • jcel-plugin : module to create the jar for Protégé
  • jcel-standalone : module to create the standalone application
  • jcel-distribution : module to create the release, a single ZIP file

Algorithm

  • translate OWL API axioms into jcel axioms, which are composed by integer numbers
  • detect the expressivity used in the axioms
  • apply normalization rules to the set of axioms, producing a set of normalized axioms and auxiliary entities if necessary
  • saturate the set of normalized axioms with deduced object property axioms
  • create an extended ontonlogy based on the set of normalized axioms
  • apply the completion rules while there is some change in the affected sets
  • remove the auxiliary entities
  • build a graph containing direct subsumers (parents), direct subsumees (children) and equivalents
  • create OWL API data structures based on the jcel's integer representation

Package dependencies

If we consider each package as a node, and each dependency between two packages as a directed edge, the structure of package dependency should be a directed acyclic graph (DAG). The packages should only make public those classes that are or could be used by another package preserving the DAG structure.

Example

This file is an example of how to start jcel.

This file is an example ontology using ELHIfR+.

Ontologies:

Release notes

See release notes.

Older versions

More information

References

Support

Any bug or unexpected behavior can be directly reported by sending a message to the author. Questions and suggestions are also very welcome.

News

@jcelreasoner