Table 1.

Scope and index ranges for subclasses of crop ontology.

CO prefix	Subclasses of crop ontology
010–089	General Germplasm and Passport Ontology
90–099	Taxonomic Ontology
100–299	Plant Anatomy and Development Ontology
300–499	Phenotype and Trait Ontology
500–699	Structural and Functional Genomic Ontology
700–799	Location and Environment Ontology
800–899	General Science Ontology
900–999	Other