Domain Ontologies Domain ontologies used during the annotation process Domain Ontologies used during the annotation process Chemical entities of biological interest Gene Ontology Pathway ontology MGED Ontology Protein Ontology Master Drug Data Base National Drug Data File National Drug File MedlinePlus Health Topics SNOMED Clinical Terms Symptom Ontology MedDRA Medical Subject Headings Online Mendelian Inheritance in Man Foundational Model of Anatomy International Classification of Disease Ontology for Biomedical Investigations Plant Ontology NCI Thesaurus NCBI organismal classification Suicidology Ontology