Figure 1.

The parent and child term organization in the whole-plant GSO. The solid curved lines joining the terms represent IS_A relationship and the dotted curved lines suggest a PART_OF relationship between the child and the parent terms. A term may or may not have a child term. In this example, germination IS_A vegetative stage and flowering IS_A reproductive stage. Similarly vegetative stage, reproductive stage, senescence, and dormancy are subtypes (IS_A) of whole-plant growth stage. Root emergence and shoot emergence are PART_OF the seedling growth stage. The seedling growth stage and imbibition are PART_OF germination. In this image not all the children terms are shown for every parent term in the GSO.