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Add logic for observations on parts of organisms
This is an issue for the PPO (but unfortunately not on github), which needs to make inferences about the presence or absence of structures on a whole plant based on an observation of a plant part, either from a herbarium specimen or from an image of a plant part. However, I think the logic is needed more broadly and should be included in BCO.
PPO has addressed this issue by creating a class called "portion of plant", which is a proper part of a plant or "derived" from a proper part of a plant (the actual relations are not yet specified, because they don't exist in RO yet). PPO logic infers that is a structure is present on a part of a plant, it must have been present on the whole plant. If a structure is absent from the plant part, you cannot make an inference about its presence on the whole plant.
I suggest that BCO create upper terms with a similar design pattern that could be used in PPO or for other organisms.