Table 1 |
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Six subclasses of part-whole relationships |
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| Part_of subtype |
Whole |
Properties of relationship |
Example |
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| component_part_of |
integral object |
Functional/heteromerous/separable |
A leg is a part_of a body. A regulatory_region is a part_of a gene. |
| portion_part_of |
mass |
Not functional/homomerous/separable |
A slice is a part_of a cake. A restriction_fragment is part_of a chromosome. |
| stuff_part_of |
object |
Not functional/heteromerous/not separable |
Carbon is a part_of a chromosome. |
| member_part_of |
collection |
Not functional/heteromerous/separable |
A sheep is a part_of a flock. A read is a part_of a contig. |
| place_part_of |
area |
Not functional/homomerous/not separable |
England is a part_of Britain. |
| feature_part_of |
activity |
Functional/heteromerous/not separable |
Inhaling is a part_of breathing. Translation is part_of protein synthesis. |
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Column 1 gives the name of the subclass; column 2, the class or 'whole' to which such parts belong; column 3, the essential properties that define that particular part-whole relationship; and column 4 provides examples. Of the six classes only two - component_part_of and member_part_of occur in SO. |
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Eilbeck et al. Genome Biology 2005 6:R44 doi:10.1186/gb-2005-6-5-r44 |
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