Figure 1From: Enhanced XAO: the ontology of Xenopus anatomy and development underpins more accurate annotation of gene expression and queries on XenbaseGrowth of the xenopus anatomy ontology. In the course of its major public releases since 2008, the number of terms in the ontology has grown by 87% and the number of part_of and develops_from relationships has substantially increased. The majority of terms in the initial release lacked definitions and is_a parents, while the latest release (October 9, 2013) is definition- and is_a-complete.Back to article page