Crop-specific trait ontologies enhance the interoperability and effectiveness of data exchange between the data sources which adopt it, by providing standard concepts that are use to describe phenotypes stored in those sources. As one of them, the Cassava Ontology is actively used and shared in different databases such as the BMS (Breeding Management system) of the IBP or the CassavaBase. Cassava, a major staple crop, is the main source of calories for 500 million people across the globe. A perennial woody shrub native to Latin America, cassava is primarily grown as an annual crop in the humid tropics. A cash crop as well as a subsistence crop, cassava's large edible starchy roots are a source of low-cost carbohydrates for millions. Cassava end products range from fresh roots cooked, boiled, baked or fried at the household level, to highly processed starch as a food additive.