Jena is Java toolkit for developing semantic Web applications. It includes an RDF API, an OWL API, SPARQL 1.1 implementation. jena support readign and writing RDF/XML, Turtle, N-triples, TriG and N-Quads as well as other formats. Storage options include in-memory, a high-performance native store as well as adapters for SQL databases.
The OWL API is a Java interface and implementation for the W3C Web Ontology Language OWL. The latest version of the API is focused towards OWL 2 which encompasses, OWL-Lite, OWL-DL and some elements of OWL-Full.
UnBBayes is a probabilistic network framework written in Java. It has both a GUI and an API with inference, sampling, learning and evaluation. It supports BN, ID, MSBN, OOBN, HBN, MEBN/PR-OWL, structure, parameter and incremental learning.
GNOWSYS, Gnowledge Networking and Organizing System, is a web based hybrid gnowledge base with a kernel for semantic computing. It is developed in Python and works as an installed product in ZOPE.
OpenCyc is the open source version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine. OpenCyc can be used as the basis for a wide variety of intelligent applications.
DL-Learner is a tool for learning concepts in Description Logics (DLs) from user-provided examples. Equivalently, it can be used to learn classes in OWL ontologies from selected objects.
The aim of the Powl - Semantic Web Development Plattform project is thus to deliver a PHP and web-based ontology edititing and management solution to the OpenSoure community.
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