  Ontology development is a non-trivial task requiring expertise in the chosen
ontological language. We propose a method for making the content of ontologies
more transparent by presenting, through the use of natural language generation,
naturalistic descriptions of ontology classes as textual paragraphs. The method
has been implemented in a proof-of- concept system, OntoVerbal, that
automatically generates paragraph-sized textual descriptions of ontological
classes expressed in OWL. OntoVerbal has been applied to ontologies that can be
loaded into Prot\'eg\'e and been evaluated with SNOMED CT, showing that it
provides coherent, well-structured and accurate textual descriptions of
ontology classes.
