A concept is a JavaBean interface with an @rdf annotations describing the subject type of the interface and the predicates of each mapped Bean property. Elmo ships with a collection of popular ontologies defined as Elmo concepts. They can be found in this elmo-concepts module. By placing one or more of the concept jars into the class-path of the elmo-module the concepts can then be used with the elmo-manager. Concept jars can also be created from other ontologies using the ontology converter.