The Mental Disease Ontology is developed to facilitate representation for all aspects of mental disease. It is an extension of the Ontology for General Medical Science (OGMS) and Mental Functioning Ontology (MF).
The Mental Disease Ontology was first described in the publication 'Foundations for a realist ontology of mental disease' (Barry Smith and Werner Ceusters) which is available at http://www.jbiomedsem.com/content/1/1/10 .