trait, qualities, characteristics

[wdduncan]

@deepakunni3 @hrshdhgd @cmungall @ @realmarcin

If we are going to interact with other OBO ontologies (e.g., ENVO, PATO, COB), I think it would be helpful if we were could provide some clarity as to how the use of trait differs from other OBO terms such as quality, and characteristic.

Getting clear on this may help us integrate better with OBO ontologies.