This brief talk will outline the need for a global food ontology to flexibly represent food across human and natural ecosystems. From an anthropocentric point of view, the sustainability and resilience of the global food system - including the sustainability of ecosystems and human-made networks which support it - should be closely interlinked with entities which realise food roles and the global policy objectives to secure food supply for all. From a more "natural" point of view, a truly global food ontology should be flexible enough to link taxa (including humans) to their consumers via the simultaneous realisation of prey, detrital, and food roles. This feature would provide a semantic basis to model food webs and, in combination with compositional inventories, nutritional profiles for ecoinformatics. These anthropogenic and natural perspectives will inevitably converge as a biospheric representation of trophic patterns emerges, a process which a flexible food ontology can greatly accelerate. Vitally, these aims will require coordination across multiple established and emerging ontologies to be feasible in the long term and a number of potential synergies with the Environment Ontology, the Agronomy Ontology, and the Sustainable Development Goal Interface Ontology will be proposed.