Pellet: The Open Source OWL DL Reasoner
Pellet is an open source reasoner for OWL 2 DL in Java. It provides standard and cutting-edge reasoning services for OWL ontologies.
Technical Overview
For semantically-enabled applications that need to represent and reason about information using OWL, Pellet is the leading choice for systems where sound-and-complete OWL DL reasoning is essential. For example, OwlSight is a lightweight, ontology browser for OWL that uses GWT, and Pronto is a probabilistic DL reasoner integrated with Pellet.
Pellet also includes support for OWL 2 profiles including OWL 2 EL. (Very scalable OWL 2 QL reasoning is available in Owlgres.) It also incorporates various optimization techniques, including novel optimizations for nominals, conjunctive query answering, and incremental reasoning. There’s more detailed information about the architecture of the system and its features in the Pellet Help.
Pellet fully supports the original OWL DL specification. OWL 2 is a forthcoming revision of the international web standard produced by the W3C for web-friendly ontologies. Pellet currently supports most of the features proposed in OWL 2.
An OWL DL reasoner like Pellet is a core component of ontology-based data management applications; if you need expertise in the use of Pellet for advanced integration or analysis applications, Clark & Parsia LLC can help in a variety of roles: consulting, application development, and OEM licensing.
Dual License Availability
Pellet is available under dual licensing terms:
- For open source applications, Pellet may be used under the terms of the AGPL version 3 license.
- For proprietary or closed source applications, Pellet is available under alternative license terms; please direct inquires to Clark & Parsia.
For more information, visit Pellet’s dual license page.
Commercial Technical Support
We provide commercial support contracts for Pellet and other components of our semantic web infrastructure. If you need commercial support, get in touch via email or visit the Pellet commercial support site.