Table 2. Sample Concepts in the Backbone Ontology.
| Concept Name | Created by ourselves? | Imported from | Properties Extended? | Relationships Extended? |
| miRNA | No | SO | Yes | Yes |
| chromoplast_gene | No | SO | No | No |
| gene_expression | No | GO | No | Yes |
| biological_process | No | GO | No | Yes |
| protein | No | PRO | Yes | Yes |
| amino_acid_chain | No | PRO | No | Yes |
| Tumor | No | HDO | Yes | Yes |
| Organ | No | FMA | Yes | Yes |
| object | No | BFO | No | Yes |
| material_entity | No | BFO | No | Yes |
| independent_continuant | No | BFO | No | Yes |
| continuant | No | BFO | No | Yes |
| entity | No | BFO | No | Yes |
| MiRNABinding | Yes | N/A | N/A | N/A |
| ExperimentalValidation | Yes | N/A | N/A | N/A |
| PharmaceuticalTreatment | Yes | N/A | N/A | N/A |
| AdvantageousRegulation | Yes | N/A | N/A | N/A |
| OncoGeneratingMiRNA | Yes | N/A | N/A | N/A |
| TumorSuppressingMiRNA | Yes | N/A | N/A | N/A |
| OtherMiRNA | Yes | N/A | N/A | N/A |