Towards a Reference Plant Trait Ontology for Modeling Knowledge of Plant Traits and Phenotypes. - Elizabeth Arnaud; Laurel Cooper; Rosemary Shrestha; Naama Menda; Rex T. Nelson; Luca Matteis; Milko Skofic; Ruth Bastow; Pankaj Jaiswal; Lukas A. Mueller; Graham McLaren (KEOD, 2012)