has role in modeling is model of The driving use case for this relation was to link a biological model system such as a cell line or model organism to a disease it is used to investigate, in virtue of the model system exhibiting features similar to that of the disease of interest. Matthew Brush A relation between a biological, experimental, or computational artifact and an entity it is used to study, in virtue of its replicating or approximating features of the studied entity. To Do: decide on scope of this relation - inclusive of computational models in domain, or only physical models? Restricted to linking biological systems and phenomena? Inclusive of only diseases in range, or broader? Relation between a research artifact and an entity it is used to study, in virtue of its replicating or approximating features of the studied entity. is used to study