[DL] [ANN] ELK 0.1.0 reasoner for OWL EL

Markus Krötzsch markus.kroetzsch at cs.ox.ac.uk
Tue Aug 2 14:58:38 CEST 2011

We are happy to announce the first release of the new

	             ELK 0.1.0
	        Reasoner for OWL EL

ELK is a free and open source reasoner for the lightweight ontology 
language OWL 2 EL. It is based on Java and can be controlled using the 
OWL API [1], Protégé [2], the Snow Owl ontology editor [3], or a basic 
command line interface. ELK is available under the Apache License 2.0.

ELK is very fast. It can classify the SNOMED CT ontology with around 
300,000 classes in less than 4 seconds on a modern laptop [4]. This is 
achieved by highly optimized consequence-based reasoning algorithms that 
can also take advantage of multi-core CPUs.

ELK 0.1.0 is the very first release of ELK. It still has only limited 
support for OWL constructs and does not yet implement all reasoning 
tasks that the OWL API includes. Its main features are:

* Reasoning tasks: classification and consistency checking
* Supported OWL constructs: ELH fragment + transitivity 
(ObjectIntersectionOf, ObjectSomeValuesFrom, SubClassOf, 
EquivalentClasses, SubObjectPropertyOf, TransitiveObjectProperty)
* Optional OWL API bindings
* Protégé plugin (can also be used in Snow Owl)
* Command line interface
* Parser for input files in OWL 2 Functional Style Syntax

ELK can be run in all operating systems that support Java 1.5 or above. 
For further details, please see the online documentation [5].

We are continuing to develop ELK into a reasoner that covers all OWL EL 
features and common reasoning tasks. Use cases, practical application 
requirements and other feedback is welcome. The ELK reasoner discussion 
group [6] is available for further discussions. People who are 
interested in contributing can also contact the developers [7] directly.


P.S. Apologies if you received multiple copies of this email.

[1] http://owlapi.sourceforge.net/
[2] http://protege.stanford.edu/
[3] http://www.b2international.com/portal/snow-owl
[5] http://code.google.com/p/elk-reasoner/wiki/ELK_Documentation
[6] http://groups.google.com/group/elk-reasoner-discussion
[7] The current maintainers of ELK are: Yevegeny Kazakov,
Markus Krötzsch, František Simančík.

More information about the dl mailing list