Glossary

A description of terms you will stumble over and over in the docs

Web Ontology Language (OWL) #: A w3c recommended exchange format for ontologies. It is based on RDF and RDFSchema.
Ontology #: An ontology is the specification of a conceptualization of a given domain. That is it defines the entities (concepts) in the domain, e.g. "Plone", "content management", "web server"... Further it contains the relationships between the concepts, e.g. "Plone is a content management system".