Improvements to the Drosophila anatomy ontology

The Drosophila anatomy ontology (DAO) defines the broad anatomy of the fruitfly Drosophila melanogaster, a genetic model organism. It contains over 8700 classes, with close to half of these corresponding to neuroanatomical terms. We are systematically reviewing the DAO classes, improving the textual information and classification. This includes adding definitions, comments and synonyms, as well as formal definitions, which results in a full classification in some cases. Classes belonging to each of the defined organ systems are reviewed together to improve consistency of free text and formalisation. So far we have reviewed 7 of the 11 organs system classes, resulting in 83% of classes having a definition.