Biological Spatial Ontology

Homepage Link: https://obofoundry.org/ontology/bspo.html

Description: An ontology for representing spatial concepts, anatomical axes, gradients, regions, planes, sides, and surfaces. These concepts can be used at multiple biological scales and in a diversity of taxa, including plants, animals and fungi. The BSPO is used to provide a source of anatomical location descriptors for logically defining anatomical entity classes in anatomy ontologies.

Example edge:

Additional Link: https://github.com/obophenotype/biological-spatial-ontology